/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:09:58,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:09:58,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:09:58,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:09:58,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:09:58,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:09:58,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:09:58,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:09:58,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:09:58,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:09:58,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:09:58,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:09:58,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:09:58,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:09:58,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:09:58,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:09:58,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:09:58,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 05:09:58,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 05:09:58,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 05:09:58,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 05:09:58,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 05:09:58,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 05:09:58,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 05:09:58,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 05:09:58,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:09:58,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:09:58,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:09:58,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:09:58,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:09:58,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:09:58,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:09:58,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:09:58,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:09:58,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:09:58,484 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:09:58,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:09:58,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:09:58,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:09:58,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:09:58,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:09:58,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:09:58,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:09:58,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:09:58,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:09:58,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:09:58,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:09:58,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:09:58,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:09:58,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:09:58,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:09:58,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:09:58,804 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:09:58,805 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:09:58,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl [2021-06-05 05:09:58,806 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl' [2021-06-05 05:09:59,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:09:59,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:09:59,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:09:59,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:09:59,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:09:59,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:09:59,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:09:59,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:09:59,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:09:59,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... [2021-06-05 05:09:59,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:09:59,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:09:59,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:09:59,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:09:59,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:09:59,210 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:09:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:09:59,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:09:59,210 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:09:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:09:59,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:09:59,211 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:09:59,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:09:59,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:09:59,211 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:09:59,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:09:59,212 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:09:59,212 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:09:59,212 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:09:59,212 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:09:59,213 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:09:59,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:09:59,452 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 05:09:59,452 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 05:09:59,453 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 05:09:59,453 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 05:09:59,453 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 05:09:59,454 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:09:59 BoogieIcfgContainer [2021-06-05 05:09:59,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:09:59,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:09:59,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:09:59,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:09:59,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:59" (1/2) ... [2021-06-05 05:09:59,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214aaaf6 and model type parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:09:59, skipping insertion in model container [2021-06-05 05:09:59,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:09:59" (2/2) ... [2021-06-05 05:09:59,460 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1.wvr.bpl [2021-06-05 05:09:59,480 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:09:59,480 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:09:59,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:09:59,481 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:09:59,582 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 05:09:59,602 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 05:09:59,619 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:09:59,619 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:09:59,619 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:09:59,619 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:09:59,619 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:09:59,619 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:09:59,619 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:09:59,619 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:09:59,627 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 29 transitions, 90 flow [2021-06-05 05:09:59,646 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:09:59,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:59,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:59,658 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2029517161, now seen corresponding path program 1 times [2021-06-05 05:09:59,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:59,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778650769] [2021-06-05 05:09:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:59,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778650769] [2021-06-05 05:09:59,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778650769] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:59,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:59,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:09:59,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329218731] [2021-06-05 05:09:59,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:09:59,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:09:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:09:59,831 INFO L87 Difference]: Start difference. First operand has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:59,902 INFO L93 Difference]: Finished difference Result 324 states and 1218 transitions. [2021-06-05 05:09:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:09:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:09:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:59,922 INFO L225 Difference]: With dead ends: 324 [2021-06-05 05:09:59,922 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 05:09:59,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:09:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 05:09:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 204. [2021-06-05 05:09:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.7339901477832513) internal successors, (758), 203 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 758 transitions. [2021-06-05 05:09:59,999 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 758 transitions. Word has length 15 [2021-06-05 05:10:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:00,001 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 758 transitions. [2021-06-05 05:10:00,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 758 transitions. [2021-06-05 05:10:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:10:00,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:00,008 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:00,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:10:00,008 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash -432769320, now seen corresponding path program 1 times [2021-06-05 05:10:00,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:00,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264713015] [2021-06-05 05:10:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:00,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264713015] [2021-06-05 05:10:00,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264713015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926988966] [2021-06-05 05:10:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:10:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926988966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:10:00,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:10:00,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-06-05 05:10:00,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973887767] [2021-06-05 05:10:00,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:10:00,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:10:00,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:10:00,292 INFO L87 Difference]: Start difference. First operand 204 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:00,330 INFO L93 Difference]: Finished difference Result 500 states and 1907 transitions. [2021-06-05 05:10:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:10:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:10:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:00,334 INFO L225 Difference]: With dead ends: 500 [2021-06-05 05:10:00,334 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 05:10:00,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:10:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 05:10:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 434. [2021-06-05 05:10:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.8960739030023093) internal successors, (1687), 433 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1687 transitions. [2021-06-05 05:10:00,367 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1687 transitions. Word has length 17 [2021-06-05 05:10:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:00,367 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1687 transitions. [2021-06-05 05:10:00,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1687 transitions. [2021-06-05 05:10:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:10:00,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:00,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:00,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:10:00,581 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash 243471090, now seen corresponding path program 1 times [2021-06-05 05:10:00,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:00,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722790983] [2021-06-05 05:10:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:00,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722790983] [2021-06-05 05:10:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722790983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930415414] [2021-06-05 05:10:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:10:00,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:00,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930415414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:10:00,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:10:00,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-06-05 05:10:00,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484340256] [2021-06-05 05:10:00,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:10:00,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:00,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:10:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:10:00,761 INFO L87 Difference]: Start difference. First operand 434 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:00,790 INFO L93 Difference]: Finished difference Result 734 states and 2844 transitions. [2021-06-05 05:10:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:10:00,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:10:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:00,797 INFO L225 Difference]: With dead ends: 734 [2021-06-05 05:10:00,797 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 05:10:00,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:10:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 05:10:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 681. [2021-06-05 05:10:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.9426470588235296) internal successors, (2681), 680 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2681 transitions. [2021-06-05 05:10:00,821 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2681 transitions. Word has length 17 [2021-06-05 05:10:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:00,821 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 2681 transitions. [2021-06-05 05:10:00,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2681 transitions. [2021-06-05 05:10:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:00,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:00,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:01,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:01,047 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash -322877901, now seen corresponding path program 1 times [2021-06-05 05:10:01,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:01,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549616067] [2021-06-05 05:10:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:01,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:01,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549616067] [2021-06-05 05:10:01,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549616067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:01,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408966353] [2021-06-05 05:10:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:01,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:01,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 05:10:01,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:01,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:01,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:01,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 05:10:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:01,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408966353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:01,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:01,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946665733] [2021-06-05 05:10:01,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:01,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:01,465 INFO L87 Difference]: Start difference. First operand 681 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:01,920 INFO L93 Difference]: Finished difference Result 1344 states and 5255 transitions. [2021-06-05 05:10:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:10:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:01,928 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 05:10:01,929 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 05:10:01,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 05:10:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 727. [2021-06-05 05:10:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.9958677685950414) internal successors, (2901), 726 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2901 transitions. [2021-06-05 05:10:01,954 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2901 transitions. Word has length 19 [2021-06-05 05:10:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:01,954 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2901 transitions. [2021-06-05 05:10:01,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2901 transitions. [2021-06-05 05:10:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:01,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:01,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:02,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:02,181 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash 262456051, now seen corresponding path program 2 times [2021-06-05 05:10:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646309826] [2021-06-05 05:10:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:02,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:02,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646309826] [2021-06-05 05:10:02,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646309826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:02,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221553798] [2021-06-05 05:10:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:02,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:02,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:02,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:10:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:02,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:02,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:02,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:02,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:02,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:02,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 05:10:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:02,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221553798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:02,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:02,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:02,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829000660] [2021-06-05 05:10:02,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:02,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:02,537 INFO L87 Difference]: Start difference. First operand 727 states and 2901 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:02,696 INFO L93 Difference]: Finished difference Result 918 states and 3625 transitions. [2021-06-05 05:10:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:02,702 INFO L225 Difference]: With dead ends: 918 [2021-06-05 05:10:02,702 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 05:10:02,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 05:10:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-06-05 05:10:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.9959349593495936) internal successors, (2949), 738 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2949 transitions. [2021-06-05 05:10:02,734 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2949 transitions. Word has length 19 [2021-06-05 05:10:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:02,734 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2949 transitions. [2021-06-05 05:10:02,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2949 transitions. [2021-06-05 05:10:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:02,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:02,737 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:02,953 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1876022785, now seen corresponding path program 3 times [2021-06-05 05:10:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720406193] [2021-06-05 05:10:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:03,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720406193] [2021-06-05 05:10:03,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720406193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464940870] [2021-06-05 05:10:03,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:03,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:10:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:03,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:03,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:03,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:03,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:03,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:03,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 05:10:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464940870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:03,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670548340] [2021-06-05 05:10:03,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:03,278 INFO L87 Difference]: Start difference. First operand 739 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:03,442 INFO L93 Difference]: Finished difference Result 914 states and 3616 transitions. [2021-06-05 05:10:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:03,471 INFO L225 Difference]: With dead ends: 914 [2021-06-05 05:10:03,471 INFO L226 Difference]: Without dead ends: 899 [2021-06-05 05:10:03,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-06-05 05:10:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 739. [2021-06-05 05:10:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.9959349593495936) internal successors, (2949), 738 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2949 transitions. [2021-06-05 05:10:03,503 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2949 transitions. Word has length 19 [2021-06-05 05:10:03,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:03,503 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2949 transitions. [2021-06-05 05:10:03,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2949 transitions. [2021-06-05 05:10:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:03,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:03,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:03,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 05:10:03,721 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 26619477, now seen corresponding path program 4 times [2021-06-05 05:10:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:03,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976663419] [2021-06-05 05:10:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976663419] [2021-06-05 05:10:03,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976663419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943343847] [2021-06-05 05:10:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:03,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:03,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:03,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:03,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:03,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:03,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 05:10:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943343847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:03,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:03,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715775746] [2021-06-05 05:10:03,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:03,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:03,985 INFO L87 Difference]: Start difference. First operand 739 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:04,262 INFO L93 Difference]: Finished difference Result 1178 states and 4636 transitions. [2021-06-05 05:10:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:04,271 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 05:10:04,271 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 05:10:04,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:10:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 05:10:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 799. [2021-06-05 05:10:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.006265664160401) internal successors, (3197), 798 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3197 transitions. [2021-06-05 05:10:04,311 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3197 transitions. Word has length 19 [2021-06-05 05:10:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:04,311 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3197 transitions. [2021-06-05 05:10:04,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3197 transitions. [2021-06-05 05:10:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:04,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:04,316 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:04,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:04,529 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 108018533, now seen corresponding path program 5 times [2021-06-05 05:10:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:04,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115283901] [2021-06-05 05:10:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:04,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:04,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115283901] [2021-06-05 05:10:04,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115283901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244496381] [2021-06-05 05:10:04,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:04,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:04,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:10:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:04,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:04,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:04,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:04,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:04,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:36 [2021-06-05 05:10:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244496381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:04,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737425024] [2021-06-05 05:10:04,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:04,872 INFO L87 Difference]: Start difference. First operand 799 states and 3197 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:05,526 INFO L93 Difference]: Finished difference Result 1115 states and 4405 transitions. [2021-06-05 05:10:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:10:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:05,534 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 05:10:05,534 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 05:10:05,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 05:10:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 803. [2021-06-05 05:10:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.006234413965087) internal successors, (3213), 802 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3213 transitions. [2021-06-05 05:10:05,565 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3213 transitions. Word has length 19 [2021-06-05 05:10:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:05,565 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3213 transitions. [2021-06-05 05:10:05,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3213 transitions. [2021-06-05 05:10:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:05,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:05,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:05,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:05,794 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:05,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1721585267, now seen corresponding path program 6 times [2021-06-05 05:10:05,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:05,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430415236] [2021-06-05 05:10:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:05,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:05,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430415236] [2021-06-05 05:10:05,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430415236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:05,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529392793] [2021-06-05 05:10:05,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:05,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:05,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:05,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:05,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:05,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:05,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:05,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:05,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:05,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 05:10:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:06,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529392793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:06,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:06,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:10:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892375371] [2021-06-05 05:10:06,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:10:06,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:10:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:06,039 INFO L87 Difference]: Start difference. First operand 803 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:06,191 INFO L93 Difference]: Finished difference Result 1049 states and 4169 transitions. [2021-06-05 05:10:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:10:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:06,198 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 05:10:06,198 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 05:10:06,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 05:10:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 809. [2021-06-05 05:10:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.006188118811881) internal successors, (3237), 808 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 3237 transitions. [2021-06-05 05:10:06,225 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 3237 transitions. Word has length 19 [2021-06-05 05:10:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:06,225 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 3237 transitions. [2021-06-05 05:10:06,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 3237 transitions. [2021-06-05 05:10:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:06,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:06,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:06,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:10:06,446 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:06,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash -479624143, now seen corresponding path program 1 times [2021-06-05 05:10:06,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:06,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447294994] [2021-06-05 05:10:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:06,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:06,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447294994] [2021-06-05 05:10:06,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447294994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:06,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788407355] [2021-06-05 05:10:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:06,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 05:10:06,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:06,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:14 [2021-06-05 05:10:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:06,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788407355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:06,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:06,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:10:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160397930] [2021-06-05 05:10:06,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:10:06,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:06,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:10:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:06,693 INFO L87 Difference]: Start difference. First operand 809 states and 3237 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:06,842 INFO L93 Difference]: Finished difference Result 1211 states and 4804 transitions. [2021-06-05 05:10:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:06,849 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 05:10:06,849 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 05:10:06,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:06,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 05:10:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 829. [2021-06-05 05:10:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 4.01207729468599) internal successors, (3322), 828 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 3322 transitions. [2021-06-05 05:10:06,877 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 3322 transitions. Word has length 19 [2021-06-05 05:10:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:06,877 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 3322 transitions. [2021-06-05 05:10:06,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 3322 transitions. [2021-06-05 05:10:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:06,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:06,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:07,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:07,103 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 33902709, now seen corresponding path program 2 times [2021-06-05 05:10:07,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:07,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671281055] [2021-06-05 05:10:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:07,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671281055] [2021-06-05 05:10:07,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671281055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827301690] [2021-06-05 05:10:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:07,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:07,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:10:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:07,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:07,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:07,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:07,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:07,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:07,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 05:10:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827301690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 05:10:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690997600] [2021-06-05 05:10:07,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:10:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:10:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:10:07,299 INFO L87 Difference]: Start difference. First operand 829 states and 3322 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:07,411 INFO L93 Difference]: Finished difference Result 1110 states and 4398 transitions. [2021-06-05 05:10:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:07,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:07,417 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 05:10:07,417 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 05:10:07,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:10:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 05:10:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 846. [2021-06-05 05:10:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 4.011834319526627) internal successors, (3390), 845 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3390 transitions. [2021-06-05 05:10:07,442 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3390 transitions. Word has length 19 [2021-06-05 05:10:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:07,442 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 3390 transitions. [2021-06-05 05:10:07,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3390 transitions. [2021-06-05 05:10:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:07,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:07,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:07,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:07,661 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1109613865, now seen corresponding path program 3 times [2021-06-05 05:10:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:07,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349326851] [2021-06-05 05:10:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:07,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349326851] [2021-06-05 05:10:07,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349326851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143736874] [2021-06-05 05:10:07,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:07,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:07,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:07,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:07,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:07,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:07,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:07,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:07,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 05:10:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143736874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:07,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:10:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993491237] [2021-06-05 05:10:07,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:10:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:10:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:07,890 INFO L87 Difference]: Start difference. First operand 846 states and 3390 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:08,022 INFO L93 Difference]: Finished difference Result 1105 states and 4384 transitions. [2021-06-05 05:10:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:08,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:08,029 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 05:10:08,029 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 05:10:08,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 05:10:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 846. [2021-06-05 05:10:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 4.011834319526627) internal successors, (3390), 845 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3390 transitions. [2021-06-05 05:10:08,056 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3390 transitions. Word has length 19 [2021-06-05 05:10:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:08,056 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 3390 transitions. [2021-06-05 05:10:08,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3390 transitions. [2021-06-05 05:10:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:08,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:08,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:08,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:10:08,273 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash -70116645, now seen corresponding path program 4 times [2021-06-05 05:10:08,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:08,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849491572] [2021-06-05 05:10:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849491572] [2021-06-05 05:10:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849491572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213446336] [2021-06-05 05:10:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:08,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:08,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:08,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 05:10:08,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:08,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:08,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:08,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 05:10:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213446336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:08,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:08,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962852995] [2021-06-05 05:10:08,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:08,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:08,490 INFO L87 Difference]: Start difference. First operand 846 states and 3390 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:08,739 INFO L93 Difference]: Finished difference Result 1294 states and 5123 transitions. [2021-06-05 05:10:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:08,762 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 05:10:08,762 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 05:10:08,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:10:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 05:10:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 872. [2021-06-05 05:10:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 4.013777267508611) internal successors, (3496), 871 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3496 transitions. [2021-06-05 05:10:08,796 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3496 transitions. Word has length 19 [2021-06-05 05:10:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:08,797 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 3496 transitions. [2021-06-05 05:10:08,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3496 transitions. [2021-06-05 05:10:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:08,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:08,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:09,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:10:09,017 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 517628677, now seen corresponding path program 5 times [2021-06-05 05:10:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553196745] [2021-06-05 05:10:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:09,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553196745] [2021-06-05 05:10:09,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553196745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465267200] [2021-06-05 05:10:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:09,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:09,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:09,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:10:09,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:09,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:09,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:09,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:10:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465267200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:09,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:09,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565291632] [2021-06-05 05:10:09,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:09,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:09,217 INFO L87 Difference]: Start difference. First operand 872 states and 3496 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:09,486 INFO L93 Difference]: Finished difference Result 1254 states and 4985 transitions. [2021-06-05 05:10:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:10:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:09,493 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 05:10:09,493 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 05:10:09,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:10:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 05:10:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 878. [2021-06-05 05:10:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 4.013683010262258) internal successors, (3520), 877 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 3520 transitions. [2021-06-05 05:10:09,521 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 3520 transitions. Word has length 19 [2021-06-05 05:10:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:09,521 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 3520 transitions. [2021-06-05 05:10:09,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 3520 transitions. [2021-06-05 05:10:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:09,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:09,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:09,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:10:09,741 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:09,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1593339833, now seen corresponding path program 6 times [2021-06-05 05:10:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:09,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004056762] [2021-06-05 05:10:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:09,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004056762] [2021-06-05 05:10:09,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004056762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515375536] [2021-06-05 05:10:09,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:09,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:09,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:09,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:09,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:09,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:09,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:09,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:09,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:09,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 05:10:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515375536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:09,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:10:09,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048184144] [2021-06-05 05:10:09,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:10:09,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:09,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:10:09,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:09,974 INFO L87 Difference]: Start difference. First operand 878 states and 3520 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:10,136 INFO L93 Difference]: Finished difference Result 1123 states and 4469 transitions. [2021-06-05 05:10:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:10:10,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:10,141 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 05:10:10,141 INFO L226 Difference]: Without dead ends: 1112 [2021-06-05 05:10:10,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-05 05:10:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 882. [2021-06-05 05:10:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 4.013620885357549) internal successors, (3536), 881 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 3536 transitions. [2021-06-05 05:10:10,166 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 3536 transitions. Word has length 19 [2021-06-05 05:10:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:10,166 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 3536 transitions. [2021-06-05 05:10:10,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 3536 transitions. [2021-06-05 05:10:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:10,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:10,168 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:10,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:10,391 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:10,392 INFO L82 PathProgramCache]: Analyzing trace with hash -297300711, now seen corresponding path program 1 times [2021-06-05 05:10:10,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:10,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482614414] [2021-06-05 05:10:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:10,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482614414] [2021-06-05 05:10:10,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482614414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954794489] [2021-06-05 05:10:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:10,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:10,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:10,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:10,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:10,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:10,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 05:10:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954794489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:10,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:10,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076621871] [2021-06-05 05:10:10,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:10,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:10,611 INFO L87 Difference]: Start difference. First operand 882 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:10,849 INFO L93 Difference]: Finished difference Result 1282 states and 5074 transitions. [2021-06-05 05:10:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:10,855 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 05:10:10,855 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 05:10:10,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:10:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 05:10:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 909. [2021-06-05 05:10:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.02863436123348) internal successors, (3658), 908 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3658 transitions. [2021-06-05 05:10:10,902 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3658 transitions. Word has length 19 [2021-06-05 05:10:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 3658 transitions. [2021-06-05 05:10:10,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3658 transitions. [2021-06-05 05:10:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:10,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:10,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:11,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:10:11,132 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1801002105, now seen corresponding path program 1 times [2021-06-05 05:10:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:11,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063270205] [2021-06-05 05:10:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:11,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:11,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063270205] [2021-06-05 05:10:11,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063270205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:11,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192268317] [2021-06-05 05:10:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:11,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 05:10:11,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:11,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:11,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:11,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 05:10:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:11,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192268317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:11,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:11,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:11,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818353929] [2021-06-05 05:10:11,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:11,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:11,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:11,368 INFO L87 Difference]: Start difference. First operand 909 states and 3658 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:11,673 INFO L93 Difference]: Finished difference Result 1460 states and 5766 transitions. [2021-06-05 05:10:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:10:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:11,678 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 05:10:11,678 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 05:10:11,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 05:10:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 897. [2021-06-05 05:10:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.011160714285714) internal successors, (3594), 896 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3594 transitions. [2021-06-05 05:10:11,705 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3594 transitions. Word has length 19 [2021-06-05 05:10:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:11,706 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3594 transitions. [2021-06-05 05:10:11,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3594 transitions. [2021-06-05 05:10:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:11,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:11,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:11,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:11,921 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1692671303, now seen corresponding path program 2 times [2021-06-05 05:10:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:11,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37131463] [2021-06-05 05:10:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:11,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:11,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37131463] [2021-06-05 05:10:11,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37131463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:11,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792353346] [2021-06-05 05:10:11,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:12,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:12,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:12,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:10:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:12,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:12,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:12,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:12,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 05:10:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792353346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:12,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:12,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145482772] [2021-06-05 05:10:12,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:12,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:12,140 INFO L87 Difference]: Start difference. First operand 897 states and 3594 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:12,484 INFO L93 Difference]: Finished difference Result 1101 states and 4371 transitions. [2021-06-05 05:10:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:10:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:12,491 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 05:10:12,491 INFO L226 Difference]: Without dead ends: 1092 [2021-06-05 05:10:12,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-05 05:10:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 903. [2021-06-05 05:10:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 4.011086474501108) internal successors, (3618), 902 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3618 transitions. [2021-06-05 05:10:12,540 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3618 transitions. Word has length 19 [2021-06-05 05:10:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:12,540 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3618 transitions. [2021-06-05 05:10:12,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3618 transitions. [2021-06-05 05:10:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:12,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:12,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:12,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:12,757 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 724489687, now seen corresponding path program 3 times [2021-06-05 05:10:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759203840] [2021-06-05 05:10:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:12,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759203840] [2021-06-05 05:10:12,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759203840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970185065] [2021-06-05 05:10:12,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:12,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:12,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:10:12,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:12,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:12,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:12,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:12,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 05:10:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:13,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970185065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:13,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:13,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:13,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901040441] [2021-06-05 05:10:13,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:13,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:13,008 INFO L87 Difference]: Start difference. First operand 903 states and 3618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:13,364 INFO L93 Difference]: Finished difference Result 1099 states and 4367 transitions. [2021-06-05 05:10:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:10:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:13,368 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 05:10:13,368 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 05:10:13,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:13,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 05:10:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 912. [2021-06-05 05:10:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 4.010976948408342) internal successors, (3654), 911 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3654 transitions. [2021-06-05 05:10:13,392 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3654 transitions. Word has length 19 [2021-06-05 05:10:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:13,392 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3654 transitions. [2021-06-05 05:10:13,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3654 transitions. [2021-06-05 05:10:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:13,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:13,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:13,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:10:13,609 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash -981852199, now seen corresponding path program 2 times [2021-06-05 05:10:13,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:13,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182776702] [2021-06-05 05:10:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:13,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182776702] [2021-06-05 05:10:13,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182776702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575431376] [2021-06-05 05:10:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:13,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:13,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:13,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:10:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:13,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:13,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:13,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:13,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:13,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:13,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 05:10:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:13,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575431376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:13,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:13,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397499092] [2021-06-05 05:10:13,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:13,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:13,849 INFO L87 Difference]: Start difference. First operand 912 states and 3654 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:14,248 INFO L93 Difference]: Finished difference Result 1135 states and 4511 transitions. [2021-06-05 05:10:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:10:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:14,252 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 05:10:14,252 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 05:10:14,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 05:10:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 920. [2021-06-05 05:10:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.0108813928182805) internal successors, (3686), 919 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3686 transitions. [2021-06-05 05:10:14,275 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3686 transitions. Word has length 19 [2021-06-05 05:10:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:14,275 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3686 transitions. [2021-06-05 05:10:14,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3686 transitions. [2021-06-05 05:10:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:14,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:14,278 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:14,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:14,506 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash 750463959, now seen corresponding path program 3 times [2021-06-05 05:10:14,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:14,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340994711] [2021-06-05 05:10:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:14,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340994711] [2021-06-05 05:10:14,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340994711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580407338] [2021-06-05 05:10:14,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:14,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:10:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:14,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:14,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:14,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 05:10:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580407338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:14,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971979945] [2021-06-05 05:10:14,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:14,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:14,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:14,730 INFO L87 Difference]: Start difference. First operand 920 states and 3686 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:15,078 INFO L93 Difference]: Finished difference Result 1134 states and 4509 transitions. [2021-06-05 05:10:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:10:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:15,082 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 05:10:15,082 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 05:10:15,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 05:10:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 924. [2021-06-05 05:10:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 4.010834236186349) internal successors, (3702), 923 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3702 transitions. [2021-06-05 05:10:15,103 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3702 transitions. Word has length 19 [2021-06-05 05:10:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:15,103 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 3702 transitions. [2021-06-05 05:10:15,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3702 transitions. [2021-06-05 05:10:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:15,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:15,106 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:15,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:10:15,326 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash -322425755, now seen corresponding path program 4 times [2021-06-05 05:10:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:15,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32970065] [2021-06-05 05:10:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:15,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32970065] [2021-06-05 05:10:15,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32970065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222465704] [2021-06-05 05:10:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:15,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:10:15,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:15,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:15,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:15,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:10:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222465704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:15,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:15,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456937491] [2021-06-05 05:10:15,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:15,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:15,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:15,523 INFO L87 Difference]: Start difference. First operand 924 states and 3702 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:15,867 INFO L93 Difference]: Finished difference Result 1347 states and 5299 transitions. [2021-06-05 05:10:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:15,871 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 05:10:15,871 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 05:10:15,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 05:10:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 958. [2021-06-05 05:10:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 4.020898641588297) internal successors, (3848), 957 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3848 transitions. [2021-06-05 05:10:15,898 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3848 transitions. Word has length 19 [2021-06-05 05:10:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:15,899 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3848 transitions. [2021-06-05 05:10:15,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3848 transitions. [2021-06-05 05:10:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:15,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:15,901 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:16,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:10:16,117 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2094735235, now seen corresponding path program 5 times [2021-06-05 05:10:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:16,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148073937] [2021-06-05 05:10:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:16,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:16,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148073937] [2021-06-05 05:10:16,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148073937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:16,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280773408] [2021-06-05 05:10:16,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:16,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:16,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:16,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:16,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:10:16,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:16,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:16,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:16,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:10:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:16,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280773408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:16,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:16,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481933083] [2021-06-05 05:10:16,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:16,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:16,324 INFO L87 Difference]: Start difference. First operand 958 states and 3848 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:16,659 INFO L93 Difference]: Finished difference Result 1389 states and 5495 transitions. [2021-06-05 05:10:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:16,662 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 05:10:16,662 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 05:10:16,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 05:10:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 991. [2021-06-05 05:10:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.042424242424242) internal successors, (4002), 990 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4002 transitions. [2021-06-05 05:10:16,686 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4002 transitions. Word has length 19 [2021-06-05 05:10:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:16,686 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4002 transitions. [2021-06-05 05:10:16,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4002 transitions. [2021-06-05 05:10:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:16,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:16,689 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:16,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:16,901 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash 486420053, now seen corresponding path program 6 times [2021-06-05 05:10:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:16,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142450390] [2021-06-05 05:10:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:16,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142450390] [2021-06-05 05:10:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142450390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017241474] [2021-06-05 05:10:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:17,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:17,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:17,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:17,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 05:10:17,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:17,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:17,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:17,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:14 [2021-06-05 05:10:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:17,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017241474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:17,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:17,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:10:17,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800922783] [2021-06-05 05:10:17,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:10:17,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:10:17,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:17,115 INFO L87 Difference]: Start difference. First operand 991 states and 4002 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:17,237 INFO L93 Difference]: Finished difference Result 1261 states and 5037 transitions. [2021-06-05 05:10:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:17,239 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 05:10:17,239 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 05:10:17,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 05:10:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1001. [2021-06-05 05:10:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 4.04) internal successors, (4040), 1000 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 4040 transitions. [2021-06-05 05:10:17,261 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 4040 transitions. Word has length 19 [2021-06-05 05:10:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:17,261 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 4040 transitions. [2021-06-05 05:10:17,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 4040 transitions. [2021-06-05 05:10:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:17,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:17,264 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:17,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:10:17,470 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -967847337, now seen corresponding path program 4 times [2021-06-05 05:10:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:17,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279501156] [2021-06-05 05:10:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:17,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279501156] [2021-06-05 05:10:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279501156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439356438] [2021-06-05 05:10:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:17,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:17,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:17,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:17,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:17,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:17,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:17,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:10:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:17,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439356438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:17,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:17,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 05:10:17,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755553075] [2021-06-05 05:10:17,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:10:17,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:10:17,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:10:17,688 INFO L87 Difference]: Start difference. First operand 1001 states and 4040 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:17,806 INFO L93 Difference]: Finished difference Result 1212 states and 4842 transitions. [2021-06-05 05:10:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:17,809 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 05:10:17,809 INFO L226 Difference]: Without dead ends: 1188 [2021-06-05 05:10:17,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-06-05 05:10:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1014. [2021-06-05 05:10:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 4.036525172754195) internal successors, (4089), 1013 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 4089 transitions. [2021-06-05 05:10:17,831 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 4089 transitions. Word has length 19 [2021-06-05 05:10:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:17,831 INFO L482 AbstractCegarLoop]: Abstraction has 1014 states and 4089 transitions. [2021-06-05 05:10:17,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 4089 transitions. [2021-06-05 05:10:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:17,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:17,834 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:18,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:18,049 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:18,049 INFO L82 PathProgramCache]: Analyzing trace with hash 764468821, now seen corresponding path program 5 times [2021-06-05 05:10:18,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:18,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49754515] [2021-06-05 05:10:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49754515] [2021-06-05 05:10:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49754515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324457583] [2021-06-05 05:10:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:18,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:18,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:18,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:10:18,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:18,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:10:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324457583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:18,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:10:18,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503419383] [2021-06-05 05:10:18,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:18,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:18,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:18,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:18,243 INFO L87 Difference]: Start difference. First operand 1014 states and 4089 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:18,528 INFO L93 Difference]: Finished difference Result 1376 states and 5493 transitions. [2021-06-05 05:10:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:18,531 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 05:10:18,531 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 05:10:18,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 05:10:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1018. [2021-06-05 05:10:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 4.03638151425762) internal successors, (4105), 1017 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 4105 transitions. [2021-06-05 05:10:18,558 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 4105 transitions. Word has length 19 [2021-06-05 05:10:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:18,558 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 4105 transitions. [2021-06-05 05:10:18,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 4105 transitions. [2021-06-05 05:10:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:10:18,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:18,561 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:18,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:10:18,785 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1342315299, now seen corresponding path program 6 times [2021-06-05 05:10:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:18,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238074583] [2021-06-05 05:10:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:18,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238074583] [2021-06-05 05:10:18,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238074583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735643801] [2021-06-05 05:10:18,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:18,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:10:18,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:18,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:18,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:18,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:18,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 05:10:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735643801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:18,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 05:10:18,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493694314] [2021-06-05 05:10:18,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:10:18,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:18,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:10:18,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:10:18,978 INFO L87 Difference]: Start difference. First operand 1018 states and 4105 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,096 INFO L93 Difference]: Finished difference Result 1318 states and 5270 transitions. [2021-06-05 05:10:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:10:19,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:10:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,099 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 05:10:19,099 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 05:10:19,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 05:10:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1022. [2021-06-05 05:10:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 4.040156709108717) internal successors, (4125), 1021 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 4125 transitions. [2021-06-05 05:10:19,127 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 4125 transitions. Word has length 19 [2021-06-05 05:10:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:19,127 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 4125 transitions. [2021-06-05 05:10:19,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 4125 transitions. [2021-06-05 05:10:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:10:19,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:19,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:19,354 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1382222734, now seen corresponding path program 7 times [2021-06-05 05:10:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:19,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092843731] [2021-06-05 05:10:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:19,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092843731] [2021-06-05 05:10:19,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092843731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:19,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869174361] [2021-06-05 05:10:19,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:10:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869174361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:19,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:19,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 05:10:19,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959546308] [2021-06-05 05:10:19,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:10:19,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:10:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:10:19,451 INFO L87 Difference]: Start difference. First operand 1022 states and 4125 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,505 INFO L93 Difference]: Finished difference Result 2014 states and 7938 transitions. [2021-06-05 05:10:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:10:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:10:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,510 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 05:10:19,510 INFO L226 Difference]: Without dead ends: 1951 [2021-06-05 05:10:19,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:10:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-06-05 05:10:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1571. [2021-06-05 05:10:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 4.067515923566879) internal successors, (6386), 1570 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6386 transitions. [2021-06-05 05:10:19,551 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6386 transitions. Word has length 21 [2021-06-05 05:10:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:19,551 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 6386 transitions. [2021-06-05 05:10:19,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6386 transitions. [2021-06-05 05:10:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:10:19,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:19,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 05:10:19,780 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:19,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1995857238, now seen corresponding path program 8 times [2021-06-05 05:10:19,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:19,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219752000] [2021-06-05 05:10:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:19,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219752000] [2021-06-05 05:10:19,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219752000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:19,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330869687] [2021-06-05 05:10:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:19,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:19,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:10:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330869687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:10:19,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:10:19,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-06-05 05:10:19,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35495020] [2021-06-05 05:10:19,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:10:19,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:19,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:10:19,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:10:19,954 INFO L87 Difference]: Start difference. First operand 1571 states and 6386 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,982 INFO L93 Difference]: Finished difference Result 2412 states and 9687 transitions. [2021-06-05 05:10:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:10:19,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:10:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,986 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 05:10:19,986 INFO L226 Difference]: Without dead ends: 2339 [2021-06-05 05:10:19,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:10:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-06-05 05:10:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1746. [2021-06-05 05:10:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 4.050429799426934) internal successors, (7068), 1745 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7068 transitions. [2021-06-05 05:10:20,025 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7068 transitions. Word has length 21 [2021-06-05 05:10:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:20,026 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 7068 transitions. [2021-06-05 05:10:20,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7068 transitions. [2021-06-05 05:10:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:10:20,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:20,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:20,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,245 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash -173194186, now seen corresponding path program 9 times [2021-06-05 05:10:20,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:20,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962452087] [2021-06-05 05:10:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:20,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:20,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962452087] [2021-06-05 05:10:20,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962452087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950656306] [2021-06-05 05:10:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:20,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:10:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950656306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:20,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 05:10:20,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146355032] [2021-06-05 05:10:20,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:10:20,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:10:20,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:10:20,380 INFO L87 Difference]: Start difference. First operand 1746 states and 7068 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:20,482 INFO L93 Difference]: Finished difference Result 2801 states and 11129 transitions. [2021-06-05 05:10:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:10:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:10:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:20,489 INFO L225 Difference]: With dead ends: 2801 [2021-06-05 05:10:20,489 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 05:10:20,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 05:10:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2373. [2021-06-05 05:10:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 4.099494097807757) internal successors, (9724), 2372 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 9724 transitions. [2021-06-05 05:10:20,544 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 9724 transitions. Word has length 21 [2021-06-05 05:10:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:20,544 INFO L482 AbstractCegarLoop]: Abstraction has 2373 states and 9724 transitions. [2021-06-05 05:10:20,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 9724 transitions. [2021-06-05 05:10:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:20,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:20,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:20,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:10:20,769 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 253599539, now seen corresponding path program 10 times [2021-06-05 05:10:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679088922] [2021-06-05 05:10:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:20,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679088922] [2021-06-05 05:10:20,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679088922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706080708] [2021-06-05 05:10:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:21,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:21,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:21,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:21,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:21,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:21,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:21,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706080708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:21,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:21,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793558793] [2021-06-05 05:10:21,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:21,245 INFO L87 Difference]: Start difference. First operand 2373 states and 9724 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:22,195 INFO L93 Difference]: Finished difference Result 2708 states and 11032 transitions. [2021-06-05 05:10:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:22,200 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 05:10:22,201 INFO L226 Difference]: Without dead ends: 2703 [2021-06-05 05:10:22,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 704.7ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-05 05:10:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2417. [2021-06-05 05:10:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 4.112996688741722) internal successors, (9937), 2416 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 9937 transitions. [2021-06-05 05:10:22,245 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 9937 transitions. Word has length 23 [2021-06-05 05:10:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:22,246 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 9937 transitions. [2021-06-05 05:10:22,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 9937 transitions. [2021-06-05 05:10:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:22,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:22,252 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:22,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:22,465 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:22,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1782556683, now seen corresponding path program 11 times [2021-06-05 05:10:22,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:22,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370716316] [2021-06-05 05:10:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:22,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:22,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370716316] [2021-06-05 05:10:22,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370716316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:22,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008781224] [2021-06-05 05:10:22,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:22,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:22,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:10:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:22,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008781224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:22,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:22,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:10:22,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840064919] [2021-06-05 05:10:22,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:10:22,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:10:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:10:22,603 INFO L87 Difference]: Start difference. First operand 2417 states and 9937 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:22,710 INFO L93 Difference]: Finished difference Result 4616 states and 18575 transitions. [2021-06-05 05:10:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:10:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:22,719 INFO L225 Difference]: With dead ends: 4616 [2021-06-05 05:10:22,719 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 05:10:22,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 05:10:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 2839. [2021-06-05 05:10:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 4.137420718816068) internal successors, (11742), 2838 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 11742 transitions. [2021-06-05 05:10:22,784 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 11742 transitions. Word has length 23 [2021-06-05 05:10:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:22,784 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 11742 transitions. [2021-06-05 05:10:22,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 11742 transitions. [2021-06-05 05:10:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:22,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:22,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:23,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:10:23,016 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash 118811635, now seen corresponding path program 12 times [2021-06-05 05:10:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:23,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513355578] [2021-06-05 05:10:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:23,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513355578] [2021-06-05 05:10:23,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513355578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602348377] [2021-06-05 05:10:23,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:23,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:23,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:23,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:23,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:23,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:23,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602348377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:23,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064200026] [2021-06-05 05:10:23,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:23,534 INFO L87 Difference]: Start difference. First operand 2839 states and 11742 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:24,686 INFO L93 Difference]: Finished difference Result 3383 states and 13890 transitions. [2021-06-05 05:10:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:24,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:24,693 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 05:10:24,693 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 05:10:24,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 05:10:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2851. [2021-06-05 05:10:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 4.1375438596491225) internal successors, (11792), 2850 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 11792 transitions. [2021-06-05 05:10:24,755 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 11792 transitions. Word has length 23 [2021-06-05 05:10:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:24,755 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 11792 transitions. [2021-06-05 05:10:24,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 11792 transitions. [2021-06-05 05:10:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:24,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:24,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:24,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:10:24,977 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 704145587, now seen corresponding path program 13 times [2021-06-05 05:10:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:24,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309385544] [2021-06-05 05:10:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:25,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:25,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309385544] [2021-06-05 05:10:25,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309385544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:25,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981487445] [2021-06-05 05:10:25,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:25,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:25,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:25,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:25,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:25,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:25,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:25,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981487445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:25,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:25,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633645783] [2021-06-05 05:10:25,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:25,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:25,465 INFO L87 Difference]: Start difference. First operand 2851 states and 11792 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:26,455 INFO L93 Difference]: Finished difference Result 3278 states and 13451 transitions. [2021-06-05 05:10:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:26,464 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 05:10:26,464 INFO L226 Difference]: Without dead ends: 3252 [2021-06-05 05:10:26,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-06-05 05:10:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2867. [2021-06-05 05:10:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2866 states have (on average 4.136775994417306) internal successors, (11856), 2866 states have internal predecessors, (11856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 11856 transitions. [2021-06-05 05:10:26,526 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 11856 transitions. Word has length 23 [2021-06-05 05:10:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:26,526 INFO L482 AbstractCegarLoop]: Abstraction has 2867 states and 11856 transitions. [2021-06-05 05:10:26,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 11856 transitions. [2021-06-05 05:10:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:26,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:26,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:26,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:10:26,749 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1977254975, now seen corresponding path program 14 times [2021-06-05 05:10:26,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:26,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292191999] [2021-06-05 05:10:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:26,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:26,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292191999] [2021-06-05 05:10:26,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292191999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:26,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440969812] [2021-06-05 05:10:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:26,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:26,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:27,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:27,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:27,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:27,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:27,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:27,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:27,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440969812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:27,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:27,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:27,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946306205] [2021-06-05 05:10:27,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:27,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:27,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:27,200 INFO L87 Difference]: Start difference. First operand 2867 states and 11856 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:28,285 INFO L93 Difference]: Finished difference Result 3257 states and 13379 transitions. [2021-06-05 05:10:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:10:28,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:28,291 INFO L225 Difference]: With dead ends: 3257 [2021-06-05 05:10:28,291 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 05:10:28,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 918.8ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 05:10:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2863. [2021-06-05 05:10:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.13696715583508) internal successors, (11840), 2862 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 11840 transitions. [2021-06-05 05:10:28,351 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 11840 transitions. Word has length 23 [2021-06-05 05:10:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:28,352 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 11840 transitions. [2021-06-05 05:10:28,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 11840 transitions. [2021-06-05 05:10:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:28,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:28,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:28,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 05:10:28,573 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash 273249153, now seen corresponding path program 15 times [2021-06-05 05:10:28,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:28,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438156842] [2021-06-05 05:10:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:28,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:28,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438156842] [2021-06-05 05:10:28,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438156842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:28,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198624553] [2021-06-05 05:10:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:28,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:28,971 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:10:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 05:10:28,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:28,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:28,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:28,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 05:10:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198624553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:29,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:10:29,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411045794] [2021-06-05 05:10:29,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:29,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:29,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:29,049 INFO L87 Difference]: Start difference. First operand 2863 states and 11840 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:29,778 INFO L93 Difference]: Finished difference Result 3196 states and 13139 transitions. [2021-06-05 05:10:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:29,787 INFO L225 Difference]: With dead ends: 3196 [2021-06-05 05:10:29,787 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 05:10:29,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:10:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 05:10:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2863. [2021-06-05 05:10:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.13696715583508) internal successors, (11840), 2862 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 11840 transitions. [2021-06-05 05:10:29,886 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 11840 transitions. Word has length 23 [2021-06-05 05:10:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:29,886 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 11840 transitions. [2021-06-05 05:10:29,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 11840 transitions. [2021-06-05 05:10:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:29,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:29,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:30,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:30,117 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:30,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1462628087, now seen corresponding path program 16 times [2021-06-05 05:10:30,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:30,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906665481] [2021-06-05 05:10:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:30,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:30,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906665481] [2021-06-05 05:10:30,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906665481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:30,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968275893] [2021-06-05 05:10:30,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:30,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:30,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:30,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:30,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:30,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:30,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:30,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:30,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:30,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968275893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:30,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:30,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578936074] [2021-06-05 05:10:30,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:30,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:30,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:30,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:30,521 INFO L87 Difference]: Start difference. First operand 2863 states and 11840 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:31,446 INFO L93 Difference]: Finished difference Result 3681 states and 15040 transitions. [2021-06-05 05:10:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:31,454 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 05:10:31,454 INFO L226 Difference]: Without dead ends: 3651 [2021-06-05 05:10:31,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:10:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-06-05 05:10:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 2898. [2021-06-05 05:10:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 4.137038315498792) internal successors, (11985), 2897 states have internal predecessors, (11985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 11985 transitions. [2021-06-05 05:10:31,540 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 11985 transitions. Word has length 23 [2021-06-05 05:10:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:31,540 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 11985 transitions. [2021-06-05 05:10:31,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 11985 transitions. [2021-06-05 05:10:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:31,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:31,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:31,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:10:31,745 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1544027143, now seen corresponding path program 17 times [2021-06-05 05:10:31,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:31,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488512138] [2021-06-05 05:10:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:31,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:31,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488512138] [2021-06-05 05:10:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488512138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:31,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090486556] [2021-06-05 05:10:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:31,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:31,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:10:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:31,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:31,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:10:32,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:32,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:32,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:32,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 05:10:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090486556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:32,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:32,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:32,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434034343] [2021-06-05 05:10:32,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:32,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:32,122 INFO L87 Difference]: Start difference. First operand 2898 states and 11985 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:32,870 INFO L93 Difference]: Finished difference Result 3457 states and 14154 transitions. [2021-06-05 05:10:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:32,877 INFO L225 Difference]: With dead ends: 3457 [2021-06-05 05:10:32,878 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 05:10:32,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 05:10:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2902. [2021-06-05 05:10:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 4.136849362288866) internal successors, (12001), 2901 states have internal predecessors, (12001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 12001 transitions. [2021-06-05 05:10:32,924 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 12001 transitions. Word has length 23 [2021-06-05 05:10:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:32,924 INFO L482 AbstractCegarLoop]: Abstraction has 2902 states and 12001 transitions. [2021-06-05 05:10:32,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 12001 transitions. [2021-06-05 05:10:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:32,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:32,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:33,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:10:33,138 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:33,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:33,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1137373419, now seen corresponding path program 18 times [2021-06-05 05:10:33,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:33,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244121404] [2021-06-05 05:10:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244121404] [2021-06-05 05:10:33,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244121404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390380278] [2021-06-05 05:10:33,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:33,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:33,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:33,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:33,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:33,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:33,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:33,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390380278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:33,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59406203] [2021-06-05 05:10:33,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:33,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:33,526 INFO L87 Difference]: Start difference. First operand 2902 states and 12001 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:34,356 INFO L93 Difference]: Finished difference Result 3466 states and 14203 transitions. [2021-06-05 05:10:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:10:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:34,364 INFO L225 Difference]: With dead ends: 3466 [2021-06-05 05:10:34,364 INFO L226 Difference]: Without dead ends: 3445 [2021-06-05 05:10:34,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 727.8ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2021-06-05 05:10:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 2908. [2021-06-05 05:10:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 4.13656690746474) internal successors, (12025), 2907 states have internal predecessors, (12025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 12025 transitions. [2021-06-05 05:10:34,410 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 12025 transitions. Word has length 23 [2021-06-05 05:10:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:34,410 INFO L482 AbstractCegarLoop]: Abstraction has 2908 states and 12025 transitions. [2021-06-05 05:10:34,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 12025 transitions. [2021-06-05 05:10:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:34,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:34,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:34,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:34,616 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2112317581, now seen corresponding path program 19 times [2021-06-05 05:10:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:34,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494723875] [2021-06-05 05:10:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:34,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494723875] [2021-06-05 05:10:34,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494723875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:34,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795050925] [2021-06-05 05:10:34,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:34,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:34,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:34,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:34,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:34,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:34,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795050925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:35,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:35,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598651217] [2021-06-05 05:10:35,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:35,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:35,071 INFO L87 Difference]: Start difference. First operand 2908 states and 12025 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:35,849 INFO L93 Difference]: Finished difference Result 3319 states and 13629 transitions. [2021-06-05 05:10:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:10:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:35,856 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 05:10:35,857 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 05:10:35,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 637.1ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:10:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 05:10:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2915. [2021-06-05 05:10:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2915 states, 2914 states have (on average 4.136238846945779) internal successors, (12053), 2914 states have internal predecessors, (12053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 12053 transitions. [2021-06-05 05:10:35,900 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 12053 transitions. Word has length 23 [2021-06-05 05:10:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:35,900 INFO L482 AbstractCegarLoop]: Abstraction has 2915 states and 12053 transitions. [2021-06-05 05:10:35,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 12053 transitions. [2021-06-05 05:10:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:35,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:35,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:36,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:36,106 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash 71296115, now seen corresponding path program 20 times [2021-06-05 05:10:36,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:36,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434342104] [2021-06-05 05:10:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:36,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434342104] [2021-06-05 05:10:36,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434342104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190633076] [2021-06-05 05:10:36,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:36,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:36,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:36,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:36,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:36,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:36,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:36,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190633076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:36,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:36,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572324095] [2021-06-05 05:10:36,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:36,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:36,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:36,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:36,588 INFO L87 Difference]: Start difference. First operand 2915 states and 12053 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:37,506 INFO L93 Difference]: Finished difference Result 3498 states and 14351 transitions. [2021-06-05 05:10:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:37,513 INFO L225 Difference]: With dead ends: 3498 [2021-06-05 05:10:37,513 INFO L226 Difference]: Without dead ends: 3476 [2021-06-05 05:10:37,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-06-05 05:10:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2931. [2021-06-05 05:10:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 4.138225255972697) internal successors, (12125), 2930 states have internal predecessors, (12125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 12125 transitions. [2021-06-05 05:10:37,560 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 12125 transitions. Word has length 23 [2021-06-05 05:10:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:37,560 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 12125 transitions. [2021-06-05 05:10:37,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 12125 transitions. [2021-06-05 05:10:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:37,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:37,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:37,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:37,782 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash 656630067, now seen corresponding path program 21 times [2021-06-05 05:10:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:37,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969688964] [2021-06-05 05:10:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:37,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:37,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969688964] [2021-06-05 05:10:37,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969688964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:37,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146055551] [2021-06-05 05:10:37,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:38,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:38,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:38,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:38,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:38,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:38,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:38,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:38,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146055551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:38,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:38,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596965791] [2021-06-05 05:10:38,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:38,231 INFO L87 Difference]: Start difference. First operand 2931 states and 12125 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:39,126 INFO L93 Difference]: Finished difference Result 3353 states and 13762 transitions. [2021-06-05 05:10:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:10:39,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:39,132 INFO L225 Difference]: With dead ends: 3353 [2021-06-05 05:10:39,133 INFO L226 Difference]: Without dead ends: 3327 [2021-06-05 05:10:39,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-06-05 05:10:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2935. [2021-06-05 05:10:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 4.138036809815951) internal successors, (12141), 2934 states have internal predecessors, (12141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 12141 transitions. [2021-06-05 05:10:39,175 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 12141 transitions. Word has length 23 [2021-06-05 05:10:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:39,175 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 12141 transitions. [2021-06-05 05:10:39,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 12141 transitions. [2021-06-05 05:10:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:39,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:39,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:39,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:10:39,381 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770495, now seen corresponding path program 22 times [2021-06-05 05:10:39,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:39,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268530368] [2021-06-05 05:10:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268530368] [2021-06-05 05:10:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268530368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221109154] [2021-06-05 05:10:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:39,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:39,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:39,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:39,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:39,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:39,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:39,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:39,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:39,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221109154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:39,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:39,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133200655] [2021-06-05 05:10:39,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:39,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:39,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:39,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:39,843 INFO L87 Difference]: Start difference. First operand 2935 states and 12141 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:40,710 INFO L93 Difference]: Finished difference Result 3378 states and 13868 transitions. [2021-06-05 05:10:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:40,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:40,717 INFO L225 Difference]: With dead ends: 3378 [2021-06-05 05:10:40,717 INFO L226 Difference]: Without dead ends: 3357 [2021-06-05 05:10:40,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 837.5ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:10:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-06-05 05:10:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2927. [2021-06-05 05:10:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 4.137730690362269) internal successors, (12107), 2926 states have internal predecessors, (12107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 12107 transitions. [2021-06-05 05:10:40,791 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 12107 transitions. Word has length 23 [2021-06-05 05:10:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:40,791 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 12107 transitions. [2021-06-05 05:10:40,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 12107 transitions. [2021-06-05 05:10:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:40,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:40,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:41,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:41,018 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash 420793493, now seen corresponding path program 23 times [2021-06-05 05:10:41,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:41,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7602846] [2021-06-05 05:10:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:41,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:41,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7602846] [2021-06-05 05:10:41,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7602846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:41,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951174207] [2021-06-05 05:10:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:41,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:41,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:41,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:41,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:41,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:41,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:41,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:41,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951174207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:41,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:41,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324071031] [2021-06-05 05:10:41,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:41,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:41,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:41,411 INFO L87 Difference]: Start difference. First operand 2927 states and 12107 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:42,303 INFO L93 Difference]: Finished difference Result 3749 states and 15336 transitions. [2021-06-05 05:10:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:42,310 INFO L225 Difference]: With dead ends: 3749 [2021-06-05 05:10:42,311 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 05:10:42,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:10:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 05:10:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 2931. [2021-06-05 05:10:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 4.138225255972697) internal successors, (12125), 2930 states have internal predecessors, (12125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 12125 transitions. [2021-06-05 05:10:42,375 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 12125 transitions. Word has length 23 [2021-06-05 05:10:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:42,375 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 12125 transitions. [2021-06-05 05:10:42,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 12125 transitions. [2021-06-05 05:10:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:42,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:42,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:42,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,600 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash 502192549, now seen corresponding path program 24 times [2021-06-05 05:10:42,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:42,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411188099] [2021-06-05 05:10:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411188099] [2021-06-05 05:10:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411188099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900973196] [2021-06-05 05:10:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:42,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:42,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:42,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:42,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:42,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:42,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900973196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:42,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:42,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344483750] [2021-06-05 05:10:42,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:42,997 INFO L87 Difference]: Start difference. First operand 2931 states and 12125 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:43,938 INFO L93 Difference]: Finished difference Result 3507 states and 14375 transitions. [2021-06-05 05:10:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:10:43,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:43,946 INFO L225 Difference]: With dead ends: 3507 [2021-06-05 05:10:43,946 INFO L226 Difference]: Without dead ends: 3481 [2021-06-05 05:10:43,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 834.8ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:10:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-06-05 05:10:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2935. [2021-06-05 05:10:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 4.138036809815951) internal successors, (12141), 2934 states have internal predecessors, (12141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 12141 transitions. [2021-06-05 05:10:43,994 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 12141 transitions. Word has length 23 [2021-06-05 05:10:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:43,994 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 12141 transitions. [2021-06-05 05:10:43,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 12141 transitions. [2021-06-05 05:10:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:43,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:43,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:44,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 05:10:44,199 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2115759283, now seen corresponding path program 25 times [2021-06-05 05:10:44,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:44,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634705566] [2021-06-05 05:10:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:44,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:44,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634705566] [2021-06-05 05:10:44,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634705566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:44,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378461025] [2021-06-05 05:10:44,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:44,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:44,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:44,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:44,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:44,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:44,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378461025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:44,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:44,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:44,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133127303] [2021-06-05 05:10:44,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:44,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:44,572 INFO L87 Difference]: Start difference. First operand 2935 states and 12141 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:45,411 INFO L93 Difference]: Finished difference Result 3535 states and 14493 transitions. [2021-06-05 05:10:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:10:45,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:45,418 INFO L225 Difference]: With dead ends: 3535 [2021-06-05 05:10:45,418 INFO L226 Difference]: Without dead ends: 3514 [2021-06-05 05:10:45,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-06-05 05:10:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2923. [2021-06-05 05:10:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 4.136550308008213) internal successors, (12087), 2922 states have internal predecessors, (12087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 12087 transitions. [2021-06-05 05:10:45,467 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 12087 transitions. Word has length 23 [2021-06-05 05:10:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:45,467 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 12087 transitions. [2021-06-05 05:10:45,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 12087 transitions. [2021-06-05 05:10:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:45,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:45,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:45,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:45,673 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 196245939, now seen corresponding path program 26 times [2021-06-05 05:10:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:45,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669287269] [2021-06-05 05:10:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:45,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:45,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669287269] [2021-06-05 05:10:45,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669287269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:45,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235804725] [2021-06-05 05:10:45,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:45,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:45,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:45,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:45,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:45,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:45,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:45,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:45,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:46,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235804725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:46,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:46,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877056353] [2021-06-05 05:10:46,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:46,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:46,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:46,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:46,040 INFO L87 Difference]: Start difference. First operand 2923 states and 12087 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:46,576 INFO L93 Difference]: Finished difference Result 3352 states and 13763 transitions. [2021-06-05 05:10:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:10:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:46,583 INFO L225 Difference]: With dead ends: 3352 [2021-06-05 05:10:46,583 INFO L226 Difference]: Without dead ends: 3318 [2021-06-05 05:10:46,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:10:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-06-05 05:10:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2938. [2021-06-05 05:10:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 4.135512427647259) internal successors, (12146), 2937 states have internal predecessors, (12146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 12146 transitions. [2021-06-05 05:10:46,639 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 12146 transitions. Word has length 23 [2021-06-05 05:10:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:46,639 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 12146 transitions. [2021-06-05 05:10:46,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 12146 transitions. [2021-06-05 05:10:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:46,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:46,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:46,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:10:46,882 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash 350683457, now seen corresponding path program 27 times [2021-06-05 05:10:46,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:46,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002412326] [2021-06-05 05:10:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:47,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:47,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002412326] [2021-06-05 05:10:47,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002412326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720809925] [2021-06-05 05:10:47,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:47,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:47,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:47,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:47,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:47,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:47,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:47,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720809925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:47,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:47,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415339664] [2021-06-05 05:10:47,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:47,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:47,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:47,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:47,259 INFO L87 Difference]: Start difference. First operand 2938 states and 12146 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:47,925 INFO L93 Difference]: Finished difference Result 3551 states and 14551 transitions. [2021-06-05 05:10:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:47,932 INFO L225 Difference]: With dead ends: 3551 [2021-06-05 05:10:47,932 INFO L226 Difference]: Without dead ends: 3521 [2021-06-05 05:10:47,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 582.9ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2021-06-05 05:10:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2942. [2021-06-05 05:10:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 4.136008160489629) internal successors, (12164), 2941 states have internal predecessors, (12164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 12164 transitions. [2021-06-05 05:10:47,980 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 12164 transitions. Word has length 23 [2021-06-05 05:10:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:47,980 INFO L482 AbstractCegarLoop]: Abstraction has 2942 states and 12164 transitions. [2021-06-05 05:10:47,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 12164 transitions. [2021-06-05 05:10:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:47,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:47,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:48,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:48,186 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 432082513, now seen corresponding path program 28 times [2021-06-05 05:10:48,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:48,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417974279] [2021-06-05 05:10:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:48,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417974279] [2021-06-05 05:10:48,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417974279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:48,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809651374] [2021-06-05 05:10:48,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:48,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:48,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:48,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:48,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:48,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:48,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809651374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:48,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:48,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:48,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843275080] [2021-06-05 05:10:48,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:48,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:48,612 INFO L87 Difference]: Start difference. First operand 2942 states and 12164 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:49,634 INFO L93 Difference]: Finished difference Result 3393 states and 13921 transitions. [2021-06-05 05:10:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:10:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:49,642 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 05:10:49,642 INFO L226 Difference]: Without dead ends: 3367 [2021-06-05 05:10:49,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:10:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-06-05 05:10:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2946. [2021-06-05 05:10:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 4.135823429541596) internal successors, (12180), 2945 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 12180 transitions. [2021-06-05 05:10:49,700 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 12180 transitions. Word has length 23 [2021-06-05 05:10:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:49,700 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 12180 transitions. [2021-06-05 05:10:49,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 12180 transitions. [2021-06-05 05:10:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:49,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:49,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:49,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:49,921 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649247, now seen corresponding path program 29 times [2021-06-05 05:10:49,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:49,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894378339] [2021-06-05 05:10:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:50,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:50,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894378339] [2021-06-05 05:10:50,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894378339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:50,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075563416] [2021-06-05 05:10:50,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:50,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:50,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:50,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:50,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:50,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:50,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075563416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:50,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:50,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:50,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981932351] [2021-06-05 05:10:50,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:50,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:50,280 INFO L87 Difference]: Start difference. First operand 2946 states and 12180 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:51,140 INFO L93 Difference]: Finished difference Result 3441 states and 14118 transitions. [2021-06-05 05:10:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:51,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:51,148 INFO L225 Difference]: With dead ends: 3441 [2021-06-05 05:10:51,148 INFO L226 Difference]: Without dead ends: 3420 [2021-06-05 05:10:51,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 755.4ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-06-05 05:10:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2938. [2021-06-05 05:10:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 4.135512427647259) internal successors, (12146), 2937 states have internal predecessors, (12146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 12146 transitions. [2021-06-05 05:10:51,197 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 12146 transitions. Word has length 23 [2021-06-05 05:10:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:51,197 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 12146 transitions. [2021-06-05 05:10:51,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 12146 transitions. [2021-06-05 05:10:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:51,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:51,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:51,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:51,403 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1838104447, now seen corresponding path program 30 times [2021-06-05 05:10:51,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:51,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264733632] [2021-06-05 05:10:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264733632] [2021-06-05 05:10:51,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264733632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105578353] [2021-06-05 05:10:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:51,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:51,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:10:51,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:51,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:10:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105578353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:51,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294164431] [2021-06-05 05:10:51,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:51,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:51,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:51,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:51,880 INFO L87 Difference]: Start difference. First operand 2938 states and 12146 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:52,654 INFO L93 Difference]: Finished difference Result 3491 states and 14324 transitions. [2021-06-05 05:10:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:52,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:52,661 INFO L225 Difference]: With dead ends: 3491 [2021-06-05 05:10:52,661 INFO L226 Difference]: Without dead ends: 3469 [2021-06-05 05:10:52,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 719.9ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-06-05 05:10:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2950. [2021-06-05 05:10:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 4.137673787724652) internal successors, (12202), 2949 states have internal predecessors, (12202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 12202 transitions. [2021-06-05 05:10:52,704 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 12202 transitions. Word has length 23 [2021-06-05 05:10:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:52,704 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 12202 transitions. [2021-06-05 05:10:52,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 12202 transitions. [2021-06-05 05:10:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:52,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:52,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:52,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:52,909 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:52,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1252770495, now seen corresponding path program 31 times [2021-06-05 05:10:52,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:52,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449686419] [2021-06-05 05:10:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449686419] [2021-06-05 05:10:53,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449686419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89096590] [2021-06-05 05:10:53,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:53,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:53,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:53,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:53,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:53,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89096590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:53,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:53,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718290053] [2021-06-05 05:10:53,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:53,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:53,328 INFO L87 Difference]: Start difference. First operand 2950 states and 12202 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:54,367 INFO L93 Difference]: Finished difference Result 3443 states and 14121 transitions. [2021-06-05 05:10:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:54,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:54,373 INFO L225 Difference]: With dead ends: 3443 [2021-06-05 05:10:54,374 INFO L226 Difference]: Without dead ends: 3417 [2021-06-05 05:10:54,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:10:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-06-05 05:10:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 2954. [2021-06-05 05:10:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 4.13748730104978) internal successors, (12218), 2953 states have internal predecessors, (12218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 12218 transitions. [2021-06-05 05:10:54,415 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 12218 transitions. Word has length 23 [2021-06-05 05:10:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:54,415 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 12218 transitions. [2021-06-05 05:10:54,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 12218 transitions. [2021-06-05 05:10:54,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:54,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:54,419 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:54,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 05:10:54,620 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash 360796239, now seen corresponding path program 32 times [2021-06-05 05:10:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:54,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028139401] [2021-06-05 05:10:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:54,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028139401] [2021-06-05 05:10:54,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028139401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856923171] [2021-06-05 05:10:54,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:54,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:54,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:54,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:54,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:54,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:54,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856923171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:55,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:55,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363355330] [2021-06-05 05:10:55,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:55,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:55,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:55,034 INFO L87 Difference]: Start difference. First operand 2954 states and 12218 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:55,958 INFO L93 Difference]: Finished difference Result 3363 states and 13809 transitions. [2021-06-05 05:10:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:55,965 INFO L225 Difference]: With dead ends: 3363 [2021-06-05 05:10:55,965 INFO L226 Difference]: Without dead ends: 3342 [2021-06-05 05:10:55,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 798.6ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-06-05 05:10:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2946. [2021-06-05 05:10:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 4.137181663837012) internal successors, (12184), 2945 states have internal predecessors, (12184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 12184 transitions. [2021-06-05 05:10:56,039 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 12184 transitions. Word has length 23 [2021-06-05 05:10:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:56,039 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 12184 transitions. [2021-06-05 05:10:56,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 12184 transitions. [2021-06-05 05:10:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:56,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:56,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:56,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 05:10:56,245 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1488607069, now seen corresponding path program 33 times [2021-06-05 05:10:56,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:56,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488210221] [2021-06-05 05:10:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:56,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488210221] [2021-06-05 05:10:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488210221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093365192] [2021-06-05 05:10:56,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:56,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:56,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:56,543 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:10:56,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:10:56,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:56,569 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 05:10:56,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:56,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:10:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:56,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093365192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:56,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:56,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:10:56,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194985206] [2021-06-05 05:10:56,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:56,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:56,616 INFO L87 Difference]: Start difference. First operand 2946 states and 12184 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:57,490 INFO L93 Difference]: Finished difference Result 3873 states and 15835 transitions. [2021-06-05 05:10:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:10:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:57,497 INFO L225 Difference]: With dead ends: 3873 [2021-06-05 05:10:57,497 INFO L226 Difference]: Without dead ends: 3832 [2021-06-05 05:10:57,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:10:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-06-05 05:10:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2966. [2021-06-05 05:10:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 4.143338954468803) internal successors, (12285), 2965 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 12285 transitions. [2021-06-05 05:10:57,543 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 12285 transitions. Word has length 23 [2021-06-05 05:10:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:57,543 INFO L482 AbstractCegarLoop]: Abstraction has 2966 states and 12285 transitions. [2021-06-05 05:10:57,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 12285 transitions. [2021-06-05 05:10:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:57,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:57,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:57,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:57,748 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1407208013, now seen corresponding path program 34 times [2021-06-05 05:10:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:57,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715540350] [2021-06-05 05:10:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:57,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715540350] [2021-06-05 05:10:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715540350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377216043] [2021-06-05 05:10:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:57,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:58,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:58,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:58,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:58,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377216043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:58,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:58,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54953933] [2021-06-05 05:10:58,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:58,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:58,119 INFO L87 Difference]: Start difference. First operand 2966 states and 12285 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:59,128 INFO L93 Difference]: Finished difference Result 3569 states and 14643 transitions. [2021-06-05 05:10:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:10:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:10:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:59,136 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 05:10:59,136 INFO L226 Difference]: Without dead ends: 3543 [2021-06-05 05:10:59,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:10:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-06-05 05:10:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2970. [2021-06-05 05:10:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.143145840350286) internal successors, (12301), 2969 states have internal predecessors, (12301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12301 transitions. [2021-06-05 05:10:59,191 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12301 transitions. Word has length 23 [2021-06-05 05:10:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:59,191 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 12301 transitions. [2021-06-05 05:10:59,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12301 transitions. [2021-06-05 05:10:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:10:59,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:59,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:59,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:59,396 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash 206358721, now seen corresponding path program 35 times [2021-06-05 05:10:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:59,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099367281] [2021-06-05 05:10:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:59,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:59,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099367281] [2021-06-05 05:10:59,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099367281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:59,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748538673] [2021-06-05 05:10:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:59,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:59,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:59,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:59,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:10:59,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:59,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:59,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:59,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:10:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:59,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748538673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:59,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:59,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:10:59,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120438614] [2021-06-05 05:10:59,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:59,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:59,740 INFO L87 Difference]: Start difference. First operand 2970 states and 12301 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:00,552 INFO L93 Difference]: Finished difference Result 3478 states and 14281 transitions. [2021-06-05 05:11:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:00,559 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 05:11:00,559 INFO L226 Difference]: Without dead ends: 3457 [2021-06-05 05:11:00,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-06-05 05:11:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2958. [2021-06-05 05:11:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 4.14169766655394) internal successors, (12247), 2957 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 12247 transitions. [2021-06-05 05:11:00,607 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 12247 transitions. Word has length 23 [2021-06-05 05:11:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:00,607 INFO L482 AbstractCegarLoop]: Abstraction has 2958 states and 12247 transitions. [2021-06-05 05:11:00,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 12247 transitions. [2021-06-05 05:11:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:00,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:00,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:00,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:00,829 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash -923022959, now seen corresponding path program 36 times [2021-06-05 05:11:00,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:00,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037011755] [2021-06-05 05:11:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:00,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037011755] [2021-06-05 05:11:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037011755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072601005] [2021-06-05 05:11:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:01,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:01,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:01,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:01,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:01,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:01,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:01,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:01,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:01,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:01,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072601005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:01,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612941839] [2021-06-05 05:11:01,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:01,270 INFO L87 Difference]: Start difference. First operand 2958 states and 12247 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:02,003 INFO L93 Difference]: Finished difference Result 3433 states and 14112 transitions. [2021-06-05 05:11:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:02,010 INFO L225 Difference]: With dead ends: 3433 [2021-06-05 05:11:02,010 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 05:11:02,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 05:11:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2966. [2021-06-05 05:11:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 4.141989881956155) internal successors, (12281), 2965 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 12281 transitions. [2021-06-05 05:11:02,049 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 12281 transitions. Word has length 23 [2021-06-05 05:11:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:02,049 INFO L482 AbstractCegarLoop]: Abstraction has 2966 states and 12281 transitions. [2021-06-05 05:11:02,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 12281 transitions. [2021-06-05 05:11:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:02,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:02,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:02,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 05:11:02,254 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -337689007, now seen corresponding path program 37 times [2021-06-05 05:11:02,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:02,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954447277] [2021-06-05 05:11:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:02,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:02,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954447277] [2021-06-05 05:11:02,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954447277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:02,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771836463] [2021-06-05 05:11:02,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:02,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:02,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:02,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:02,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:02,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:02,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:02,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771836463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:02,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:02,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:02,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993375633] [2021-06-05 05:11:02,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:02,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:02,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:02,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:02,708 INFO L87 Difference]: Start difference. First operand 2966 states and 12281 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:03,472 INFO L93 Difference]: Finished difference Result 3412 states and 14013 transitions. [2021-06-05 05:11:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:03,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:03,479 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 05:11:03,479 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 05:11:03,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 795.5ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 05:11:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2970. [2021-06-05 05:11:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.141798585382284) internal successors, (12297), 2969 states have internal predecessors, (12297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12297 transitions. [2021-06-05 05:11:03,526 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12297 transitions. Word has length 23 [2021-06-05 05:11:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:03,527 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 12297 transitions. [2021-06-05 05:11:03,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12297 transitions. [2021-06-05 05:11:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:03,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:03,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:03,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:03,751 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:03,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1275877727, now seen corresponding path program 38 times [2021-06-05 05:11:03,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:03,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120966368] [2021-06-05 05:11:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:03,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:03,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120966368] [2021-06-05 05:11:03,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120966368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:03,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690941573] [2021-06-05 05:11:03,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:03,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:03,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:04,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:04,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:04,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:04,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:04,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:04,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690941573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:04,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:04,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:04,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846577485] [2021-06-05 05:11:04,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:04,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:04,237 INFO L87 Difference]: Start difference. First operand 2970 states and 12297 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:04,955 INFO L93 Difference]: Finished difference Result 3324 states and 13674 transitions. [2021-06-05 05:11:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:04,962 INFO L225 Difference]: With dead ends: 3324 [2021-06-05 05:11:04,962 INFO L226 Difference]: Without dead ends: 3303 [2021-06-05 05:11:04,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-06-05 05:11:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2962. [2021-06-05 05:11:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 4.141506247889227) internal successors, (12263), 2961 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 12263 transitions. [2021-06-05 05:11:05,009 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 12263 transitions. Word has length 23 [2021-06-05 05:11:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:05,009 INFO L482 AbstractCegarLoop]: Abstraction has 2962 states and 12263 transitions. [2021-06-05 05:11:05,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 12263 transitions. [2021-06-05 05:11:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:05,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:05,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:05,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 05:11:05,214 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash -768585441, now seen corresponding path program 39 times [2021-06-05 05:11:05,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:05,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208650587] [2021-06-05 05:11:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:05,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:05,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208650587] [2021-06-05 05:11:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208650587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698416952] [2021-06-05 05:11:05,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:05,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:05,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:11:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:05,665 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:11:05,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 05:11:05,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:05,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:05,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:05,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 05:11:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:05,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698416952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:05,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:05,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180783570] [2021-06-05 05:11:05,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:05,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:05,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:05,728 INFO L87 Difference]: Start difference. First operand 2962 states and 12263 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:06,622 INFO L93 Difference]: Finished difference Result 3338 states and 13726 transitions. [2021-06-05 05:11:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:11:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:06,629 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 05:11:06,630 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 05:11:06,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 744.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 05:11:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 2954. [2021-06-05 05:11:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 4.14121232644768) internal successors, (12229), 2953 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 12229 transitions. [2021-06-05 05:11:06,678 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 12229 transitions. Word has length 23 [2021-06-05 05:11:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:06,678 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 12229 transitions. [2021-06-05 05:11:06,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 12229 transitions. [2021-06-05 05:11:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:06,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:06,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:06,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:06,884 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:06,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2129186517, now seen corresponding path program 40 times [2021-06-05 05:11:06,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:06,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677594659] [2021-06-05 05:11:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:07,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677594659] [2021-06-05 05:11:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677594659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617160583] [2021-06-05 05:11:07,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:07,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:07,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:07,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:07,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:07,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:07,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:07,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:07,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617160583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:07,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:07,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823145916] [2021-06-05 05:11:07,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:07,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:07,349 INFO L87 Difference]: Start difference. First operand 2954 states and 12229 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:08,326 INFO L93 Difference]: Finished difference Result 3650 states and 14966 transitions. [2021-06-05 05:11:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:08,334 INFO L225 Difference]: With dead ends: 3650 [2021-06-05 05:11:08,334 INFO L226 Difference]: Without dead ends: 3628 [2021-06-05 05:11:08,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 852.0ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2021-06-05 05:11:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 2982. [2021-06-05 05:11:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 05:11:08,381 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 05:11:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:08,381 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 05:11:08,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 05:11:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:08,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:08,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:08,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 05:11:08,586 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1580446827, now seen corresponding path program 41 times [2021-06-05 05:11:08,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:08,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466957575] [2021-06-05 05:11:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:08,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466957575] [2021-06-05 05:11:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466957575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:08,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948210320] [2021-06-05 05:11:08,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:08,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:08,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:08,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:08,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:08,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:08,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 05:11:08,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:08,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:08,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:08,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:73 [2021-06-05 05:11:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:09,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948210320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:09,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:09,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649264820] [2021-06-05 05:11:09,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:09,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:09,107 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:10,380 INFO L93 Difference]: Finished difference Result 3408 states and 13968 transitions. [2021-06-05 05:11:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:10,389 INFO L225 Difference]: With dead ends: 3408 [2021-06-05 05:11:10,389 INFO L226 Difference]: Without dead ends: 3382 [2021-06-05 05:11:10,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1185.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:11:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-06-05 05:11:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2986. [2021-06-05 05:11:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.1457286432160805) internal successors, (12375), 2985 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 12375 transitions. [2021-06-05 05:11:10,454 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 12375 transitions. Word has length 23 [2021-06-05 05:11:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:10,454 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 12375 transitions. [2021-06-05 05:11:10,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 12375 transitions. [2021-06-05 05:11:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:10,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:10,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:10,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:10,658 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash 33119907, now seen corresponding path program 42 times [2021-06-05 05:11:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:10,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391469720] [2021-06-05 05:11:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:10,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:10,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391469720] [2021-06-05 05:11:10,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391469720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:10,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069401878] [2021-06-05 05:11:10,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:10,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:10,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:11,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 05:11:11,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:11,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:11,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:11,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 05:11:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:11,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069401878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:11,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:11,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:11,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472246520] [2021-06-05 05:11:11,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:11,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:11,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:11,142 INFO L87 Difference]: Start difference. First operand 2986 states and 12375 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:11,841 INFO L93 Difference]: Finished difference Result 3571 states and 14632 transitions. [2021-06-05 05:11:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:11,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:11,849 INFO L225 Difference]: With dead ends: 3571 [2021-06-05 05:11:11,849 INFO L226 Difference]: Without dead ends: 3550 [2021-06-05 05:11:11,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-05 05:11:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2982. [2021-06-05 05:11:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 05:11:11,893 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 05:11:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:11,893 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 05:11:11,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 05:11:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:11,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:12,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:11:12,099 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1816283401, now seen corresponding path program 43 times [2021-06-05 05:11:12,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:12,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480604249] [2021-06-05 05:11:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:12,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:12,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480604249] [2021-06-05 05:11:12,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480604249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383643042] [2021-06-05 05:11:12,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:12,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:12,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:12,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:12,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:12,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:12,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383643042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:12,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:12,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839786525] [2021-06-05 05:11:12,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:12,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:12,494 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:13,287 INFO L93 Difference]: Finished difference Result 3819 states and 15624 transitions. [2021-06-05 05:11:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:13,295 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 05:11:13,295 INFO L226 Difference]: Without dead ends: 3789 [2021-06-05 05:11:13,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-06-05 05:11:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 2982. [2021-06-05 05:11:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 05:11:13,340 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 05:11:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:13,341 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 05:11:13,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 05:11:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:13,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:13,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:13,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:13,546 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1734884345, now seen corresponding path program 44 times [2021-06-05 05:11:13,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:13,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893509829] [2021-06-05 05:11:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:13,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:13,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893509829] [2021-06-05 05:11:13,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893509829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278900743] [2021-06-05 05:11:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:13,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:13,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:13,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:13,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:13,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:13,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:13,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:13,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:13,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278900743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:14,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678642849] [2021-06-05 05:11:14,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:14,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:14,001 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:14,741 INFO L93 Difference]: Finished difference Result 3585 states and 14706 transitions. [2021-06-05 05:11:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:14,748 INFO L225 Difference]: With dead ends: 3585 [2021-06-05 05:11:14,748 INFO L226 Difference]: Without dead ends: 3559 [2021-06-05 05:11:14,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 738.1ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-06-05 05:11:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2990. [2021-06-05 05:11:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 4.146202743392439) internal successors, (12393), 2989 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 12393 transitions. [2021-06-05 05:11:14,792 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 12393 transitions. Word has length 23 [2021-06-05 05:11:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:14,792 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 12393 transitions. [2021-06-05 05:11:14,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 12393 transitions. [2021-06-05 05:11:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:14,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:14,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:14,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 05:11:14,998 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:14,998 INFO L82 PathProgramCache]: Analyzing trace with hash -121317611, now seen corresponding path program 45 times [2021-06-05 05:11:14,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:14,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45285893] [2021-06-05 05:11:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:15,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:15,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45285893] [2021-06-05 05:11:15,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45285893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:15,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106600557] [2021-06-05 05:11:15,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:15,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:15,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:15,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:15,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:15,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:15,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:15,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:15,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106600557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:15,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:15,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:15,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566663151] [2021-06-05 05:11:15,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:15,372 INFO L87 Difference]: Start difference. First operand 2990 states and 12393 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:16,236 INFO L93 Difference]: Finished difference Result 3586 states and 14697 transitions. [2021-06-05 05:11:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:16,243 INFO L225 Difference]: With dead ends: 3586 [2021-06-05 05:11:16,243 INFO L226 Difference]: Without dead ends: 3565 [2021-06-05 05:11:16,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-06-05 05:11:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2990. [2021-06-05 05:11:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 4.146202743392439) internal successors, (12393), 2989 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 12393 transitions. [2021-06-05 05:11:16,317 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 12393 transitions. Word has length 23 [2021-06-05 05:11:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:16,317 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 12393 transitions. [2021-06-05 05:11:16,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 12393 transitions. [2021-06-05 05:11:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:16,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:16,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:16,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:11:16,523 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2040830955, now seen corresponding path program 46 times [2021-06-05 05:11:16,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:16,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365174930] [2021-06-05 05:11:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:16,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:16,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365174930] [2021-06-05 05:11:16,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365174930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387995005] [2021-06-05 05:11:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:16,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:16,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:16,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:16,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:16,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:16,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:16,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387995005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:16,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014422999] [2021-06-05 05:11:16,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:16,958 INFO L87 Difference]: Start difference. First operand 2990 states and 12393 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:17,674 INFO L93 Difference]: Finished difference Result 3478 states and 14275 transitions. [2021-06-05 05:11:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:17,681 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 05:11:17,682 INFO L226 Difference]: Without dead ends: 3444 [2021-06-05 05:11:17,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-05 05:11:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3002. [2021-06-05 05:11:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 05:11:17,727 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 05:11:17,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:17,728 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 05:11:17,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 05:11:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:17,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:17,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:17,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 05:11:17,933 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1886393437, now seen corresponding path program 47 times [2021-06-05 05:11:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:17,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155637595] [2021-06-05 05:11:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:18,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:18,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155637595] [2021-06-05 05:11:18,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155637595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:18,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726466155] [2021-06-05 05:11:18,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:18,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:18,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:18,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:18,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:18,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:18,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:18,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:18,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:18,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:18,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726466155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:18,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:18,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:18,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489533344] [2021-06-05 05:11:18,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:18,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:18,265 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:18,881 INFO L93 Difference]: Finished difference Result 3510 states and 14401 transitions. [2021-06-05 05:11:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:18,889 INFO L225 Difference]: With dead ends: 3510 [2021-06-05 05:11:18,889 INFO L226 Difference]: Without dead ends: 3480 [2021-06-05 05:11:18,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:18,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-06-05 05:11:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3002. [2021-06-05 05:11:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 05:11:18,938 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 05:11:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:18,938 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 05:11:18,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 05:11:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:18,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:18,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:19,144 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1804994381, now seen corresponding path program 48 times [2021-06-05 05:11:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134286526] [2021-06-05 05:11:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:19,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134286526] [2021-06-05 05:11:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134286526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767409505] [2021-06-05 05:11:19,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:19,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:11:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:19,458 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:11:19,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:11:19,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:19,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:19,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:19,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:11:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:19,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767409505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:19,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:19,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687172713] [2021-06-05 05:11:19,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:19,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:19,596 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:20,195 INFO L93 Difference]: Finished difference Result 3360 states and 13811 transitions. [2021-06-05 05:11:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:20,202 INFO L225 Difference]: With dead ends: 3360 [2021-06-05 05:11:20,202 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 05:11:20,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 575.8ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 05:11:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3010. [2021-06-05 05:11:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 4.146892655367232) internal successors, (12478), 3009 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 12478 transitions. [2021-06-05 05:11:20,243 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 12478 transitions. Word has length 23 [2021-06-05 05:11:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:20,243 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 12478 transitions. [2021-06-05 05:11:20,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 12478 transitions. [2021-06-05 05:11:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:20,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:20,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:20,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,448 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash -191427647, now seen corresponding path program 49 times [2021-06-05 05:11:20,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:20,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501696813] [2021-06-05 05:11:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:20,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:20,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501696813] [2021-06-05 05:11:20,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501696813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935903084] [2021-06-05 05:11:20,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:20,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:20,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:20,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:20,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:20,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:20,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:20,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:20,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935903084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:20,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:20,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641827022] [2021-06-05 05:11:20,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:20,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:20,814 INFO L87 Difference]: Start difference. First operand 3010 states and 12478 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:21,729 INFO L93 Difference]: Finished difference Result 3475 states and 14253 transitions. [2021-06-05 05:11:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:21,736 INFO L225 Difference]: With dead ends: 3475 [2021-06-05 05:11:21,736 INFO L226 Difference]: Without dead ends: 3454 [2021-06-05 05:11:21,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-06-05 05:11:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3002. [2021-06-05 05:11:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 05:11:21,780 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 05:11:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:21,780 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 05:11:21,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 05:11:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:21,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:21,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:21,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:11:21,985 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1046511881, now seen corresponding path program 50 times [2021-06-05 05:11:21,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:21,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229205019] [2021-06-05 05:11:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:22,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:22,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229205019] [2021-06-05 05:11:22,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229205019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:22,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856801111] [2021-06-05 05:11:22,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:22,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:22,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:22,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:22,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:22,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:22,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:22,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:22,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:22,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:22,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856801111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:22,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:22,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:22,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647819905] [2021-06-05 05:11:22,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:22,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:22,382 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:23,575 INFO L93 Difference]: Finished difference Result 3503 states and 14345 transitions. [2021-06-05 05:11:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:11:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:23,582 INFO L225 Difference]: With dead ends: 3503 [2021-06-05 05:11:23,582 INFO L226 Difference]: Without dead ends: 3494 [2021-06-05 05:11:23,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1015.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:11:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2021-06-05 05:11:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3084. [2021-06-05 05:11:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 4.150827116445021) internal successors, (12797), 3083 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 12797 transitions. [2021-06-05 05:11:23,629 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 12797 transitions. Word has length 23 [2021-06-05 05:11:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:23,629 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 12797 transitions. [2021-06-05 05:11:23,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 12797 transitions. [2021-06-05 05:11:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:23,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:23,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:23,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:11:23,837 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -131430393, now seen corresponding path program 51 times [2021-06-05 05:11:23,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:23,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813482201] [2021-06-05 05:11:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:23,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813482201] [2021-06-05 05:11:23,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813482201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59030528] [2021-06-05 05:11:23,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:24,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:11:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:24,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:24,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 05:11:24,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:24,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:24,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:24,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2021-06-05 05:11:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:24,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59030528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:24,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:24,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:24,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271748341] [2021-06-05 05:11:24,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:24,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:24,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:24,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:24,159 INFO L87 Difference]: Start difference. First operand 3084 states and 12797 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:24,736 INFO L93 Difference]: Finished difference Result 3799 states and 15493 transitions. [2021-06-05 05:11:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:11:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:24,744 INFO L225 Difference]: With dead ends: 3799 [2021-06-05 05:11:24,744 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 05:11:24,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 05:11:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3222. [2021-06-05 05:11:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 4.163924247128221) internal successors, (13412), 3221 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 13412 transitions. [2021-06-05 05:11:24,790 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 13412 transitions. Word has length 23 [2021-06-05 05:11:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:24,790 INFO L482 AbstractCegarLoop]: Abstraction has 3222 states and 13412 transitions. [2021-06-05 05:11:24,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 13412 transitions. [2021-06-05 05:11:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:24,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:24,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:24,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 05:11:24,996 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash 23007125, now seen corresponding path program 52 times [2021-06-05 05:11:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:24,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031858857] [2021-06-05 05:11:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031858857] [2021-06-05 05:11:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031858857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663807811] [2021-06-05 05:11:25,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:25,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:25,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:25,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:25,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:25,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:25,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:25,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:25,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:25,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663807811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:25,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:25,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217151058] [2021-06-05 05:11:25,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:25,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:25,380 INFO L87 Difference]: Start difference. First operand 3222 states and 13412 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:26,817 INFO L93 Difference]: Finished difference Result 4809 states and 19560 transitions. [2021-06-05 05:11:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:11:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:26,827 INFO L225 Difference]: With dead ends: 4809 [2021-06-05 05:11:26,827 INFO L226 Difference]: Without dead ends: 4770 [2021-06-05 05:11:26,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1226.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:11:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2021-06-05 05:11:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3254. [2021-06-05 05:11:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 4.171841377190286) internal successors, (13571), 3253 states have internal predecessors, (13571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 13571 transitions. [2021-06-05 05:11:26,881 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 13571 transitions. Word has length 23 [2021-06-05 05:11:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:26,881 INFO L482 AbstractCegarLoop]: Abstraction has 3254 states and 13571 transitions. [2021-06-05 05:11:26,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 13571 transitions. [2021-06-05 05:11:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:26,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:26,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:27,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:11:27,086 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:27,086 INFO L82 PathProgramCache]: Analyzing trace with hash 104406181, now seen corresponding path program 53 times [2021-06-05 05:11:27,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:27,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009376287] [2021-06-05 05:11:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:27,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009376287] [2021-06-05 05:11:27,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009376287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063420653] [2021-06-05 05:11:27,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:27,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:27,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:27,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:27,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:27,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:27,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:27,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:27,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063420653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:27,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:27,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131498418] [2021-06-05 05:11:27,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:27,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:27,433 INFO L87 Difference]: Start difference. First operand 3254 states and 13571 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:29,057 INFO L93 Difference]: Finished difference Result 4296 states and 17603 transitions. [2021-06-05 05:11:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:11:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:29,066 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 05:11:29,066 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 05:11:29,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1403.7ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:11:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 05:11:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3290. [2021-06-05 05:11:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 4.176649437519003) internal successors, (13737), 3289 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 13737 transitions. [2021-06-05 05:11:29,141 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 13737 transitions. Word has length 23 [2021-06-05 05:11:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:29,141 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 13737 transitions. [2021-06-05 05:11:29,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 13737 transitions. [2021-06-05 05:11:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:29,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:29,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:29,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:29,347 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1717972915, now seen corresponding path program 54 times [2021-06-05 05:11:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995528549] [2021-06-05 05:11:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995528549] [2021-06-05 05:11:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995528549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355836612] [2021-06-05 05:11:29,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:29,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:11:29,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:29,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:29,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:29,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:11:29,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:29,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:29,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:29,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:11:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355836612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:29,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:29,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869937492] [2021-06-05 05:11:29,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:29,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:29,669 INFO L87 Difference]: Start difference. First operand 3290 states and 13737 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,504 INFO L93 Difference]: Finished difference Result 4047 states and 16638 transitions. [2021-06-05 05:11:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,512 INFO L225 Difference]: With dead ends: 4047 [2021-06-05 05:11:30,512 INFO L226 Difference]: Without dead ends: 4015 [2021-06-05 05:11:30,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-06-05 05:11:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3328. [2021-06-05 05:11:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 4.179440937781785) internal successors, (13905), 3327 states have internal predecessors, (13905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 13905 transitions. [2021-06-05 05:11:30,557 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 13905 transitions. Word has length 23 [2021-06-05 05:11:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:30,557 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 13905 transitions. [2021-06-05 05:11:30,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 13905 transitions. [2021-06-05 05:11:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:30,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:30,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:30,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,762 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1054200805, now seen corresponding path program 55 times [2021-06-05 05:11:30,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:30,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83026654] [2021-06-05 05:11:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:30,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83026654] [2021-06-05 05:11:30,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83026654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682098339] [2021-06-05 05:11:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:30,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:31,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:31,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:31,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:31,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:31,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:31,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682098339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:31,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:31,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333284805] [2021-06-05 05:11:31,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:31,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:31,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:31,183 INFO L87 Difference]: Start difference. First operand 3328 states and 13905 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:32,255 INFO L93 Difference]: Finished difference Result 3976 states and 16457 transitions. [2021-06-05 05:11:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:32,263 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 05:11:32,263 INFO L226 Difference]: Without dead ends: 3954 [2021-06-05 05:11:32,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 942.3ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-06-05 05:11:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3340. [2021-06-05 05:11:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 05:11:32,310 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 05:11:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:32,310 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 05:11:32,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 05:11:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:32,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:32,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:32,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:32,543 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1639534757, now seen corresponding path program 56 times [2021-06-05 05:11:32,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:32,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586180909] [2021-06-05 05:11:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:32,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586180909] [2021-06-05 05:11:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586180909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365009796] [2021-06-05 05:11:32,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:32,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:32,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:32,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:32,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:32,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:32,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:32,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365009796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:32,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:32,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097719884] [2021-06-05 05:11:32,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:32,937 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:33,768 INFO L93 Difference]: Finished difference Result 3805 states and 15756 transitions. [2021-06-05 05:11:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:33,776 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 05:11:33,776 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 05:11:33,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 745.2ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 05:11:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3344. [2021-06-05 05:11:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.1809751720011965) internal successors, (13977), 3343 states have internal predecessors, (13977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13977 transitions. [2021-06-05 05:11:33,825 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13977 transitions. Word has length 23 [2021-06-05 05:11:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:33,826 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 13977 transitions. [2021-06-05 05:11:33,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13977 transitions. [2021-06-05 05:11:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:33,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:33,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:34,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:11:34,032 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:34,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1041865805, now seen corresponding path program 57 times [2021-06-05 05:11:34,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:34,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242144378] [2021-06-05 05:11:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:34,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242144378] [2021-06-05 05:11:34,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242144378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202871639] [2021-06-05 05:11:34,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:34,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:11:34,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:34,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:34,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:34,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:34,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:34,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:34,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:34,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202871639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:34,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:34,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497665175] [2021-06-05 05:11:34,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:34,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:34,513 INFO L87 Difference]: Start difference. First operand 3344 states and 13977 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,932 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 05:11:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:35,678 INFO L93 Difference]: Finished difference Result 3845 states and 15919 transitions. [2021-06-05 05:11:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:35,684 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 05:11:35,685 INFO L226 Difference]: Without dead ends: 3824 [2021-06-05 05:11:35,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1098.0ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-06-05 05:11:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3336. [2021-06-05 05:11:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 4.1808095952023985) internal successors, (13943), 3335 states have internal predecessors, (13943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 13943 transitions. [2021-06-05 05:11:35,754 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 13943 transitions. Word has length 23 [2021-06-05 05:11:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:35,754 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 13943 transitions. [2021-06-05 05:11:35,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 13943 transitions. [2021-06-05 05:11:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:35,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:35,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 05:11:35,959 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1403698183, now seen corresponding path program 58 times [2021-06-05 05:11:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:35,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882248906] [2021-06-05 05:11:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:36,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882248906] [2021-06-05 05:11:36,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882248906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578930875] [2021-06-05 05:11:36,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:36,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:36,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:36,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:36,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:36,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:36,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:36,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578930875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:36,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:36,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077674348] [2021-06-05 05:11:36,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:36,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:36,325 INFO L87 Difference]: Start difference. First operand 3336 states and 13943 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:36,925 INFO L93 Difference]: Finished difference Result 4068 states and 16800 transitions. [2021-06-05 05:11:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:36,934 INFO L225 Difference]: With dead ends: 4068 [2021-06-05 05:11:36,934 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 05:11:36,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 05:11:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3340. [2021-06-05 05:11:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 05:11:36,984 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 05:11:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:36,984 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 05:11:36,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 05:11:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:36,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:36,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:37,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 05:11:37,190 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1196303323, now seen corresponding path program 59 times [2021-06-05 05:11:37,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:37,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618843850] [2021-06-05 05:11:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:37,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618843850] [2021-06-05 05:11:37,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618843850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189343973] [2021-06-05 05:11:37,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:37,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:11:37,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:37,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:37,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:37,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:37,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:37,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:37,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189343973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:37,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:37,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266213802] [2021-06-05 05:11:37,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:37,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:37,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:37,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:37,536 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:38,406 INFO L93 Difference]: Finished difference Result 3865 states and 16001 transitions. [2021-06-05 05:11:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:38,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:38,414 INFO L225 Difference]: With dead ends: 3865 [2021-06-05 05:11:38,414 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 05:11:38,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 05:11:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3340. [2021-06-05 05:11:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 05:11:38,461 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 05:11:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:38,461 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 05:11:38,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 05:11:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:38,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:38,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:38,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:38,668 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1179150629, now seen corresponding path program 60 times [2021-06-05 05:11:38,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:38,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004238910] [2021-06-05 05:11:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:38,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:38,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004238910] [2021-06-05 05:11:38,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004238910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534062974] [2021-06-05 05:11:38,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:38,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:38,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:38,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:11:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:38,979 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:11:38,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:11:38,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:39,007 INFO L628 ElimStorePlain]: treesize reduction 55, result has 23.6 percent of original size [2021-06-05 05:11:39,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:39,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 05:11:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:39,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534062974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:39,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:39,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586697316] [2021-06-05 05:11:39,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:39,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:39,064 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:39,966 INFO L93 Difference]: Finished difference Result 3828 states and 15851 transitions. [2021-06-05 05:11:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:11:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:39,974 INFO L225 Difference]: With dead ends: 3828 [2021-06-05 05:11:39,974 INFO L226 Difference]: Without dead ends: 3794 [2021-06-05 05:11:39,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:11:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-06-05 05:11:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3344. [2021-06-05 05:11:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.1809751720011965) internal successors, (13977), 3343 states have internal predecessors, (13977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13977 transitions. [2021-06-05 05:11:40,018 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13977 transitions. Word has length 23 [2021-06-05 05:11:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:40,018 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 13977 transitions. [2021-06-05 05:11:40,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13977 transitions. [2021-06-05 05:11:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:40,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:40,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:40,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:40,223 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:40,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1333588147, now seen corresponding path program 61 times [2021-06-05 05:11:40,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:40,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258731112] [2021-06-05 05:11:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:40,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:40,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258731112] [2021-06-05 05:11:40,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258731112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990490525] [2021-06-05 05:11:40,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:40,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:40,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:40,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:40,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990490525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:40,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:40,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534071584] [2021-06-05 05:11:40,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:40,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:40,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:40,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:40,570 INFO L87 Difference]: Start difference. First operand 3344 states and 13977 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:41,156 INFO L93 Difference]: Finished difference Result 3857 states and 15959 transitions. [2021-06-05 05:11:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:41,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:41,164 INFO L225 Difference]: With dead ends: 3857 [2021-06-05 05:11:41,164 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 05:11:41,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 05:11:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3348. [2021-06-05 05:11:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3348 states, 3347 states have (on average 4.181356438601733) internal successors, (13995), 3347 states have internal predecessors, (13995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3348 states to 3348 states and 13995 transitions. [2021-06-05 05:11:41,212 INFO L78 Accepts]: Start accepts. Automaton has 3348 states and 13995 transitions. Word has length 23 [2021-06-05 05:11:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:41,212 INFO L482 AbstractCegarLoop]: Abstraction has 3348 states and 13995 transitions. [2021-06-05 05:11:41,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3348 states and 13995 transitions. [2021-06-05 05:11:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:41,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:41,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:41,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:11:41,439 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1414987203, now seen corresponding path program 62 times [2021-06-05 05:11:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:41,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202241257] [2021-06-05 05:11:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:41,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:41,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202241257] [2021-06-05 05:11:41,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202241257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:41,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48232224] [2021-06-05 05:11:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:41,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:41,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:41,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:41,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:41,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:41,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:41,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48232224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:41,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:41,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699887289] [2021-06-05 05:11:41,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:41,776 INFO L87 Difference]: Start difference. First operand 3348 states and 13995 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:42,454 INFO L93 Difference]: Finished difference Result 3716 states and 15408 transitions. [2021-06-05 05:11:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:42,462 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 05:11:42,462 INFO L226 Difference]: Without dead ends: 3690 [2021-06-05 05:11:42,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2021-06-05 05:11:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3352. [2021-06-05 05:11:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 05:11:42,537 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 05:11:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:42,537 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 05:11:42,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 05:11:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:42,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:42,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:42,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 05:11:42,743 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1266413359, now seen corresponding path program 63 times [2021-06-05 05:11:42,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:42,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560477159] [2021-06-05 05:11:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:42,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560477159] [2021-06-05 05:11:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560477159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165057627] [2021-06-05 05:11:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:42,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:11:42,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:42,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:42,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:42,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:42,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:42,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:42,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:43,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165057627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:43,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:43,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:43,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786643669] [2021-06-05 05:11:43,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:43,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:43,084 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:44,027 INFO L93 Difference]: Finished difference Result 3760 states and 15583 transitions. [2021-06-05 05:11:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:44,036 INFO L225 Difference]: With dead ends: 3760 [2021-06-05 05:11:44,036 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 05:11:44,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 786.0ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 05:11:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3352. [2021-06-05 05:11:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 05:11:44,091 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 05:11:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:44,091 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 05:11:44,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 05:11:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:44,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:44,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:44,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:44,297 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -855199757, now seen corresponding path program 64 times [2021-06-05 05:11:44,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:44,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439800859] [2021-06-05 05:11:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:44,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:44,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439800859] [2021-06-05 05:11:44,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439800859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878389016] [2021-06-05 05:11:44,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:44,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:44,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:44,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:44,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:44,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:44,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:44,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:44,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:44,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878389016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:44,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631212174] [2021-06-05 05:11:44,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:44,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:44,713 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:45,632 INFO L93 Difference]: Finished difference Result 3955 states and 16375 transitions. [2021-06-05 05:11:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:45,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:45,641 INFO L225 Difference]: With dead ends: 3955 [2021-06-05 05:11:45,641 INFO L226 Difference]: Without dead ends: 3933 [2021-06-05 05:11:45,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2021-06-05 05:11:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3356. [2021-06-05 05:11:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 4.181520119225037) internal successors, (14029), 3355 states have internal predecessors, (14029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 14029 transitions. [2021-06-05 05:11:45,698 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 14029 transitions. Word has length 23 [2021-06-05 05:11:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:45,698 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 14029 transitions. [2021-06-05 05:11:45,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 14029 transitions. [2021-06-05 05:11:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:45,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:45,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:45,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 05:11:45,904 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash -269865805, now seen corresponding path program 65 times [2021-06-05 05:11:45,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:45,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665983965] [2021-06-05 05:11:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:46,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665983965] [2021-06-05 05:11:46,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665983965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114881370] [2021-06-05 05:11:46,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:46,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:11:46,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:46,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:46,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:46,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:46,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:46,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114881370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:46,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:46,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345581531] [2021-06-05 05:11:46,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:46,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:46,375 INFO L87 Difference]: Start difference. First operand 3356 states and 14029 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:47,259 INFO L93 Difference]: Finished difference Result 3899 states and 16126 transitions. [2021-06-05 05:11:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:47,267 INFO L225 Difference]: With dead ends: 3899 [2021-06-05 05:11:47,268 INFO L226 Difference]: Without dead ends: 3873 [2021-06-05 05:11:47,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 831.2ms TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2021-06-05 05:11:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3360. [2021-06-05 05:11:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 4.18130395951176) internal successors, (14045), 3359 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 14045 transitions. [2021-06-05 05:11:47,321 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 14045 transitions. Word has length 23 [2021-06-05 05:11:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:47,321 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 14045 transitions. [2021-06-05 05:11:47,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 14045 transitions. [2021-06-05 05:11:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:47,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:47,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:47,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:11:47,528 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1343700929, now seen corresponding path program 66 times [2021-06-05 05:11:47,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:47,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437705859] [2021-06-05 05:11:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:47,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:47,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437705859] [2021-06-05 05:11:47,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437705859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:47,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587653093] [2021-06-05 05:11:47,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:47,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:47,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:47,862 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:11:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 05:11:47,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:47,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:47,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:47,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 05:11:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:47,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587653093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:47,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:47,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:47,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706727600] [2021-06-05 05:11:47,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:47,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:47,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:47,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:47,956 INFO L87 Difference]: Start difference. First operand 3360 states and 14045 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:49,087 INFO L93 Difference]: Finished difference Result 3778 states and 15654 transitions. [2021-06-05 05:11:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:11:49,088 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:49,095 INFO L225 Difference]: With dead ends: 3778 [2021-06-05 05:11:49,095 INFO L226 Difference]: Without dead ends: 3757 [2021-06-05 05:11:49,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 950.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:11:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-06-05 05:11:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3352. [2021-06-05 05:11:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 05:11:49,143 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 05:11:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:49,143 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 05:11:49,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 05:11:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:49,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:49,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:49,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:11:49,375 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:49,375 INFO L82 PathProgramCache]: Analyzing trace with hash -424303323, now seen corresponding path program 67 times [2021-06-05 05:11:49,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:49,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177663971] [2021-06-05 05:11:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:49,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177663971] [2021-06-05 05:11:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177663971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983736652] [2021-06-05 05:11:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:49,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:49,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:49,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:49,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:49,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:49,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983736652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:49,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:49,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:49,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835914417] [2021-06-05 05:11:49,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:49,735 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:50,533 INFO L93 Difference]: Finished difference Result 3875 states and 16039 transitions. [2021-06-05 05:11:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:50,541 INFO L225 Difference]: With dead ends: 3875 [2021-06-05 05:11:50,541 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 05:11:50,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 05:11:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3356. [2021-06-05 05:11:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 4.180923994038748) internal successors, (14027), 3355 states have internal predecessors, (14027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 14027 transitions. [2021-06-05 05:11:50,592 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 14027 transitions. Word has length 23 [2021-06-05 05:11:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:50,592 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 14027 transitions. [2021-06-05 05:11:50,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 14027 transitions. [2021-06-05 05:11:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:50,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:50,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:50,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 05:11:50,798 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 59881731, now seen corresponding path program 68 times [2021-06-05 05:11:50,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:50,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931114688] [2021-06-05 05:11:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:50,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:50,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931114688] [2021-06-05 05:11:50,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931114688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751907345] [2021-06-05 05:11:50,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:51,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:51,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:51,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:51,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:51,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:51,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:51,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:51,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751907345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:51,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:51,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:51,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732211512] [2021-06-05 05:11:51,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:51,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:51,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:51,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:51,277 INFO L87 Difference]: Start difference. First operand 3356 states and 14027 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:52,059 INFO L93 Difference]: Finished difference Result 3877 states and 16068 transitions. [2021-06-05 05:11:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:52,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:52,067 INFO L225 Difference]: With dead ends: 3877 [2021-06-05 05:11:52,067 INFO L226 Difference]: Without dead ends: 3855 [2021-06-05 05:11:52,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 764.1ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-05 05:11:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3364. [2021-06-05 05:11:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 4.181088314005352) internal successors, (14061), 3363 states have internal predecessors, (14061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 14061 transitions. [2021-06-05 05:11:52,119 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 14061 transitions. Word has length 23 [2021-06-05 05:11:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:52,119 INFO L482 AbstractCegarLoop]: Abstraction has 3364 states and 14061 transitions. [2021-06-05 05:11:52,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 14061 transitions. [2021-06-05 05:11:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:52,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:52,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:52,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:52,329 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash 645215683, now seen corresponding path program 69 times [2021-06-05 05:11:52,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:52,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442712499] [2021-06-05 05:11:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:52,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442712499] [2021-06-05 05:11:52,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442712499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598819290] [2021-06-05 05:11:52,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:52,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:11:52,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:11:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:52,687 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:11:52,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 05:11:52,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:52,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:52,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:52,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 05:11:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:52,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598819290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:52,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:11:52,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023380340] [2021-06-05 05:11:52,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:52,845 INFO L87 Difference]: Start difference. First operand 3364 states and 14061 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:53,746 INFO L93 Difference]: Finished difference Result 3711 states and 15368 transitions. [2021-06-05 05:11:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:11:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:53,753 INFO L225 Difference]: With dead ends: 3711 [2021-06-05 05:11:53,753 INFO L226 Difference]: Without dead ends: 3685 [2021-06-05 05:11:53,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 790.5ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2021-06-05 05:11:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3368. [2021-06-05 05:11:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 4.1808731808731805) internal successors, (14077), 3367 states have internal predecessors, (14077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 14077 transitions. [2021-06-05 05:11:53,797 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 14077 transitions. Word has length 23 [2021-06-05 05:11:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:53,797 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 14077 transitions. [2021-06-05 05:11:53,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 14077 transitions. [2021-06-05 05:11:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:53,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:53,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:54,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:54,005 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:54,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2036184879, now seen corresponding path program 70 times [2021-06-05 05:11:54,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:54,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216831929] [2021-06-05 05:11:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:54,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216831929] [2021-06-05 05:11:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216831929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196349722] [2021-06-05 05:11:54,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:54,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:54,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:54,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:54,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:11:54,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:54,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:54,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:54,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:11:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:54,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196349722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:54,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:54,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:54,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928739910] [2021-06-05 05:11:54,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:54,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:54,391 INFO L87 Difference]: Start difference. First operand 3368 states and 14077 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-05 05:11:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:55,302 INFO L93 Difference]: Finished difference Result 3766 states and 15611 transitions. [2021-06-05 05:11:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:55,311 INFO L225 Difference]: With dead ends: 3766 [2021-06-05 05:11:55,311 INFO L226 Difference]: Without dead ends: 3745 [2021-06-05 05:11:55,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-06-05 05:11:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3360. [2021-06-05 05:11:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 4.180708544209586) internal successors, (14043), 3359 states have internal predecessors, (14043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 14043 transitions. [2021-06-05 05:11:55,363 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 14043 transitions. Word has length 23 [2021-06-05 05:11:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:55,363 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 14043 transitions. [2021-06-05 05:11:55,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 14043 transitions. [2021-06-05 05:11:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:55,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:55,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:55,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 05:11:55,569 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash 214319249, now seen corresponding path program 71 times [2021-06-05 05:11:55,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:55,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697568445] [2021-06-05 05:11:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:55,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:55,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697568445] [2021-06-05 05:11:55,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697568445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:55,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256498723] [2021-06-05 05:11:55,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:55,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:55,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:55,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:55,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:55,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:55,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:55,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:55,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:55,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:56,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256498723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:56,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:56,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371575685] [2021-06-05 05:11:56,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:56,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:56,005 INFO L87 Difference]: Start difference. First operand 3360 states and 14043 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:56,605 INFO L93 Difference]: Finished difference Result 3765 states and 15626 transitions. [2021-06-05 05:11:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:11:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:56,613 INFO L225 Difference]: With dead ends: 3765 [2021-06-05 05:11:56,613 INFO L226 Difference]: Without dead ends: 3742 [2021-06-05 05:11:56,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:11:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-06-05 05:11:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3366. [2021-06-05 05:11:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 4.180980683506687) internal successors, (14069), 3365 states have internal predecessors, (14069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 14069 transitions. [2021-06-05 05:11:56,662 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 14069 transitions. Word has length 23 [2021-06-05 05:11:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:56,662 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 14069 transitions. [2021-06-05 05:11:56,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 14069 transitions. [2021-06-05 05:11:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:56,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:56,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:56,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 05:11:56,868 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -614814159, now seen corresponding path program 1 times [2021-06-05 05:11:56,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:56,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932176746] [2021-06-05 05:11:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:56,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:56,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932176746] [2021-06-05 05:11:56,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932176746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112330279] [2021-06-05 05:11:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:57,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:11:57,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:57,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:57,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:57,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:11:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:57,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112330279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:57,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:57,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637023841] [2021-06-05 05:11:57,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:57,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:57,220 INFO L87 Difference]: Start difference. First operand 3366 states and 14069 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:57,946 INFO L93 Difference]: Finished difference Result 3716 states and 15432 transitions. [2021-06-05 05:11:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:57,954 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 05:11:57,954 INFO L226 Difference]: Without dead ends: 3701 [2021-06-05 05:11:57,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-06-05 05:11:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 3372. [2021-06-05 05:11:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 4.1809552061702755) internal successors, (14094), 3371 states have internal predecessors, (14094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 14094 transitions. [2021-06-05 05:11:58,005 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 14094 transitions. Word has length 23 [2021-06-05 05:11:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:58,005 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 14094 transitions. [2021-06-05 05:11:58,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 14094 transitions. [2021-06-05 05:11:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:58,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:58,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:58,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:58,210 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -749602063, now seen corresponding path program 2 times [2021-06-05 05:11:58,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:58,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094222683] [2021-06-05 05:11:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:58,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:58,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094222683] [2021-06-05 05:11:58,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094222683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:58,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298819299] [2021-06-05 05:11:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:58,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:58,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:58,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:58,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 05:11:58,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:58,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:58,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:11:58,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-06-05 05:11:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:58,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298819299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:58,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:58,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:11:58,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212445231] [2021-06-05 05:11:58,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:11:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:11:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:58,579 INFO L87 Difference]: Start difference. First operand 3372 states and 14094 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:59,194 INFO L93 Difference]: Finished difference Result 3718 states and 15442 transitions. [2021-06-05 05:11:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:11:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:59,201 INFO L225 Difference]: With dead ends: 3718 [2021-06-05 05:11:59,202 INFO L226 Difference]: Without dead ends: 3703 [2021-06-05 05:11:59,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3703 states. [2021-06-05 05:11:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3703 to 3386. [2021-06-05 05:11:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 4.181683899556869) internal successors, (14155), 3385 states have internal predecessors, (14155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 14155 transitions. [2021-06-05 05:11:59,247 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 14155 transitions. Word has length 23 [2021-06-05 05:11:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:59,247 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 14155 transitions. [2021-06-05 05:11:59,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 14155 transitions. [2021-06-05 05:11:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:11:59,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:59,252 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:59,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:59,452 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -164268111, now seen corresponding path program 3 times [2021-06-05 05:11:59,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:59,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584267565] [2021-06-05 05:11:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:59,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584267565] [2021-06-05 05:11:59,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584267565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315973758] [2021-06-05 05:11:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:59,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:59,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:59,861 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:11:59,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 05:11:59,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:59,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:59,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:59,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-06-05 05:12:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:00,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315973758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:00,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:00,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:12:00,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987910487] [2021-06-05 05:12:00,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:12:00,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:00,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:12:00,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:00,038 INFO L87 Difference]: Start difference. First operand 3386 states and 14155 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:00,984 INFO L93 Difference]: Finished difference Result 3761 states and 15604 transitions. [2021-06-05 05:12:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:12:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:00,991 INFO L225 Difference]: With dead ends: 3761 [2021-06-05 05:12:00,991 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 05:12:00,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 05:12:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3398. [2021-06-05 05:12:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 4.181630850750662) internal successors, (14205), 3397 states have internal predecessors, (14205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 14205 transitions. [2021-06-05 05:12:01,038 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 14205 transitions. Word has length 23 [2021-06-05 05:12:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:01,038 INFO L482 AbstractCegarLoop]: Abstraction has 3398 states and 14205 transitions. [2021-06-05 05:12:01,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 14205 transitions. [2021-06-05 05:12:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:01,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:01,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:01,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:12:01,243 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1449298623, now seen corresponding path program 4 times [2021-06-05 05:12:01,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:01,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609366719] [2021-06-05 05:12:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:01,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609366719] [2021-06-05 05:12:01,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609366719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448777811] [2021-06-05 05:12:01,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:01,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:01,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:01,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:01,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:01,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:01,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:01,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:01,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:01,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448777811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:01,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:01,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:01,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203500537] [2021-06-05 05:12:01,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:01,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:01,609 INFO L87 Difference]: Start difference. First operand 3398 states and 14205 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:02,678 INFO L93 Difference]: Finished difference Result 3671 states and 15256 transitions. [2021-06-05 05:12:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:02,687 INFO L225 Difference]: With dead ends: 3671 [2021-06-05 05:12:02,688 INFO L226 Difference]: Without dead ends: 3656 [2021-06-05 05:12:02,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 932.1ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:12:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-05 05:12:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3394. [2021-06-05 05:12:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 3393 states have (on average 4.181255526083112) internal successors, (14187), 3393 states have internal predecessors, (14187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 14187 transitions. [2021-06-05 05:12:02,742 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 14187 transitions. Word has length 23 [2021-06-05 05:12:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:02,742 INFO L482 AbstractCegarLoop]: Abstraction has 3394 states and 14187 transitions. [2021-06-05 05:12:02,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 14187 transitions. [2021-06-05 05:12:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:02,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:02,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:02,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:02,948 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash -595164545, now seen corresponding path program 5 times [2021-06-05 05:12:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:02,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608788433] [2021-06-05 05:12:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:03,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608788433] [2021-06-05 05:12:03,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608788433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222173674] [2021-06-05 05:12:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:03,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:03,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:03,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:03,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:03,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:03,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:03,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:03,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222173674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:03,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:03,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:03,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655043901] [2021-06-05 05:12:03,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:03,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:03,347 INFO L87 Difference]: Start difference. First operand 3394 states and 14187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,042 INFO L93 Difference]: Finished difference Result 3711 states and 15412 transitions. [2021-06-05 05:12:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,049 INFO L225 Difference]: With dead ends: 3711 [2021-06-05 05:12:04,050 INFO L226 Difference]: Without dead ends: 3696 [2021-06-05 05:12:04,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-06-05 05:12:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3386. [2021-06-05 05:12:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 4.18109305760709) internal successors, (14153), 3385 states have internal predecessors, (14153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 14153 transitions. [2021-06-05 05:12:04,102 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 14153 transitions. Word has length 23 [2021-06-05 05:12:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,102 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 14153 transitions. [2021-06-05 05:12:04,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 14153 transitions. [2021-06-05 05:12:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:04,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:04,316 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,316 INFO L82 PathProgramCache]: Analyzing trace with hash 244717011, now seen corresponding path program 6 times [2021-06-05 05:12:04,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085470291] [2021-06-05 05:12:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085470291] [2021-06-05 05:12:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085470291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223747619] [2021-06-05 05:12:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:04,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:12:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:04,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:04,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:04,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:04,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:04,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:04,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223747619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:04,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:04,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314479420] [2021-06-05 05:12:04,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:04,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:04,690 INFO L87 Difference]: Start difference. First operand 3386 states and 14153 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,544 INFO L93 Difference]: Finished difference Result 4088 states and 16918 transitions. [2021-06-05 05:12:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,553 INFO L225 Difference]: With dead ends: 4088 [2021-06-05 05:12:05,553 INFO L226 Difference]: Without dead ends: 4066 [2021-06-05 05:12:05,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 738.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2021-06-05 05:12:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3406. [2021-06-05 05:12:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 4.182966226138032) internal successors, (14243), 3405 states have internal predecessors, (14243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 14243 transitions. [2021-06-05 05:12:05,605 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 14243 transitions. Word has length 23 [2021-06-05 05:12:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,605 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 14243 transitions. [2021-06-05 05:12:05,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 14243 transitions. [2021-06-05 05:12:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:05,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,811 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,811 INFO L82 PathProgramCache]: Analyzing trace with hash 830050963, now seen corresponding path program 7 times [2021-06-05 05:12:05,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693804036] [2021-06-05 05:12:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693804036] [2021-06-05 05:12:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693804036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442830405] [2021-06-05 05:12:05,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:06,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:06,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:06,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:06,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:06,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:06,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:06,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442830405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:06,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:06,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:06,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473048103] [2021-06-05 05:12:06,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:06,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:06,258 INFO L87 Difference]: Start difference. First operand 3406 states and 14243 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:07,357 INFO L93 Difference]: Finished difference Result 3955 states and 16374 transitions. [2021-06-05 05:12:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:07,367 INFO L225 Difference]: With dead ends: 3955 [2021-06-05 05:12:07,367 INFO L226 Difference]: Without dead ends: 3929 [2021-06-05 05:12:07,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 978.2ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:12:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-06-05 05:12:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3410. [2021-06-05 05:12:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 4.1827515400410675) internal successors, (14259), 3409 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 14259 transitions. [2021-06-05 05:12:07,424 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 14259 transitions. Word has length 23 [2021-06-05 05:12:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:07,424 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 14259 transitions. [2021-06-05 05:12:07,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 14259 transitions. [2021-06-05 05:12:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:07,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:07,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:07,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:07,630 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1851349599, now seen corresponding path program 8 times [2021-06-05 05:12:07,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:07,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803526172] [2021-06-05 05:12:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:07,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803526172] [2021-06-05 05:12:07,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803526172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339170999] [2021-06-05 05:12:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:07,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:07,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:07,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:07,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:07,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:07,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:07,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:08,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339170999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:08,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:08,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447766980] [2021-06-05 05:12:08,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:08,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:08,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:08,003 INFO L87 Difference]: Start difference. First operand 3410 states and 14259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,304 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-05 05:12:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:09,185 INFO L93 Difference]: Finished difference Result 3935 states and 16300 transitions. [2021-06-05 05:12:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:12:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:09,193 INFO L225 Difference]: With dead ends: 3935 [2021-06-05 05:12:09,193 INFO L226 Difference]: Without dead ends: 3914 [2021-06-05 05:12:09,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 954.9ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:12:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2021-06-05 05:12:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3402. [2021-06-05 05:12:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 4.182593354895619) internal successors, (14225), 3401 states have internal predecessors, (14225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 14225 transitions. [2021-06-05 05:12:09,247 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 14225 transitions. Word has length 23 [2021-06-05 05:12:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:09,247 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 14225 transitions. [2021-06-05 05:12:09,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 14225 transitions. [2021-06-05 05:12:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:09,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:09,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:09,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 05:12:09,453 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 594214389, now seen corresponding path program 9 times [2021-06-05 05:12:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:09,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255965796] [2021-06-05 05:12:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:09,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:09,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255965796] [2021-06-05 05:12:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255965796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851525995] [2021-06-05 05:12:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:09,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:09,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:12:09,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:09,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 05:12:09,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:09,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:09,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:09,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 05:12:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:09,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851525995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:09,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:09,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825736815] [2021-06-05 05:12:09,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:09,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:09,819 INFO L87 Difference]: Start difference. First operand 3402 states and 14225 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:10,456 INFO L93 Difference]: Finished difference Result 4084 states and 16893 transitions. [2021-06-05 05:12:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:10,464 INFO L225 Difference]: With dead ends: 4084 [2021-06-05 05:12:10,464 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 05:12:10,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:12:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 05:12:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3417. [2021-06-05 05:12:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 4.182377049180328) internal successors, (14287), 3416 states have internal predecessors, (14287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 14287 transitions. [2021-06-05 05:12:10,511 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 14287 transitions. Word has length 23 [2021-06-05 05:12:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:10,511 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 14287 transitions. [2021-06-05 05:12:10,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 14287 transitions. [2021-06-05 05:12:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:10,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:10,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:10,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:10,716 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash 675613445, now seen corresponding path program 10 times [2021-06-05 05:12:10,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:10,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820466768] [2021-06-05 05:12:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:10,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:10,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820466768] [2021-06-05 05:12:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820466768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270702522] [2021-06-05 05:12:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:10,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:10,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:10,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:10,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:10,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:11,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270702522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:11,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:11,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962708700] [2021-06-05 05:12:11,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:11,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:11,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:11,091 INFO L87 Difference]: Start difference. First operand 3417 states and 14287 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:12,116 INFO L93 Difference]: Finished difference Result 3968 states and 16422 transitions. [2021-06-05 05:12:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:12,124 INFO L225 Difference]: With dead ends: 3968 [2021-06-05 05:12:12,124 INFO L226 Difference]: Without dead ends: 3942 [2021-06-05 05:12:12,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 977.6ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2021-06-05 05:12:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3421. [2021-06-05 05:12:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 4.182163742690059) internal successors, (14303), 3420 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 14303 transitions. [2021-06-05 05:12:12,172 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 14303 transitions. Word has length 23 [2021-06-05 05:12:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:12,172 INFO L482 AbstractCegarLoop]: Abstraction has 3421 states and 14303 transitions. [2021-06-05 05:12:12,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 14303 transitions. [2021-06-05 05:12:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:12,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:12,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:12,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 05:12:12,378 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2005787117, now seen corresponding path program 11 times [2021-06-05 05:12:12,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:12,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966813297] [2021-06-05 05:12:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:12,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966813297] [2021-06-05 05:12:12,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966813297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500911611] [2021-06-05 05:12:12,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:12,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:12,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:12,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 05:12:12,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 05:12:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500911611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:12,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060668920] [2021-06-05 05:12:12,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:12,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:12,798 INFO L87 Difference]: Start difference. First operand 3421 states and 14303 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:13,488 INFO L93 Difference]: Finished difference Result 3940 states and 16315 transitions. [2021-06-05 05:12:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:13,496 INFO L225 Difference]: With dead ends: 3940 [2021-06-05 05:12:13,496 INFO L226 Difference]: Without dead ends: 3919 [2021-06-05 05:12:13,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:12:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2021-06-05 05:12:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3409. [2021-06-05 05:12:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3408 states have (on average 4.181044600938967) internal successors, (14249), 3408 states have internal predecessors, (14249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 14249 transitions. [2021-06-05 05:12:13,546 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 14249 transitions. Word has length 23 [2021-06-05 05:12:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:13,546 INFO L482 AbstractCegarLoop]: Abstraction has 3409 states and 14249 transitions. [2021-06-05 05:12:13,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 14249 transitions. [2021-06-05 05:12:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:13,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:13,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:13,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:13,752 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:13,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1159798499, now seen corresponding path program 12 times [2021-06-05 05:12:13,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:13,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580900827] [2021-06-05 05:12:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:13,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:13,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580900827] [2021-06-05 05:12:13,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580900827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669217328] [2021-06-05 05:12:13,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:13,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:13,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:14,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:14,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:14,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:14,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:14,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669217328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:14,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:14,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344697598] [2021-06-05 05:12:14,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:14,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:14,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:14,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:14,108 INFO L87 Difference]: Start difference. First operand 3409 states and 14249 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:14,816 INFO L93 Difference]: Finished difference Result 3908 states and 16196 transitions. [2021-06-05 05:12:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:14,824 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 05:12:14,824 INFO L226 Difference]: Without dead ends: 3886 [2021-06-05 05:12:14,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2021-06-05 05:12:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3417. [2021-06-05 05:12:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 4.181206088992974) internal successors, (14283), 3416 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 14283 transitions. [2021-06-05 05:12:14,876 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 14283 transitions. Word has length 23 [2021-06-05 05:12:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:14,876 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 14283 transitions. [2021-06-05 05:12:14,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 14283 transitions. [2021-06-05 05:12:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:14,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:14,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:15,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,082 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1745132451, now seen corresponding path program 13 times [2021-06-05 05:12:15,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:15,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454153313] [2021-06-05 05:12:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:15,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454153313] [2021-06-05 05:12:15,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454153313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768444423] [2021-06-05 05:12:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:15,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:15,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:15,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:15,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:15,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:15,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:15,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768444423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:15,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:15,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276832477] [2021-06-05 05:12:15,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:15,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:15,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:15,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:15,484 INFO L87 Difference]: Start difference. First operand 3417 states and 14283 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:16,372 INFO L93 Difference]: Finished difference Result 3820 states and 15834 transitions. [2021-06-05 05:12:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:16,379 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 05:12:16,379 INFO L226 Difference]: Without dead ends: 3794 [2021-06-05 05:12:16,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 856.5ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:12:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-06-05 05:12:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3421. [2021-06-05 05:12:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 4.180994152046783) internal successors, (14299), 3420 states have internal predecessors, (14299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 14299 transitions. [2021-06-05 05:12:16,425 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 14299 transitions. Word has length 23 [2021-06-05 05:12:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:16,425 INFO L482 AbstractCegarLoop]: Abstraction has 3421 states and 14299 transitions. [2021-06-05 05:12:16,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 14299 transitions. [2021-06-05 05:12:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:16,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:16,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:16,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 05:12:16,631 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash -936268111, now seen corresponding path program 14 times [2021-06-05 05:12:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:16,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745256808] [2021-06-05 05:12:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:16,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:16,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745256808] [2021-06-05 05:12:16,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745256808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529951867] [2021-06-05 05:12:16,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:16,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:17,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:17,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:17,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:17,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:17,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529951867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:17,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:17,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128557998] [2021-06-05 05:12:17,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:17,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:17,117 INFO L87 Difference]: Start difference. First operand 3421 states and 14299 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:18,081 INFO L93 Difference]: Finished difference Result 3796 states and 15744 transitions. [2021-06-05 05:12:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:18,089 INFO L225 Difference]: With dead ends: 3796 [2021-06-05 05:12:18,089 INFO L226 Difference]: Without dead ends: 3775 [2021-06-05 05:12:18,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:12:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-05 05:12:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3413. [2021-06-05 05:12:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 4.180832356389215) internal successors, (14265), 3412 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 14265 transitions. [2021-06-05 05:12:18,139 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 14265 transitions. Word has length 23 [2021-06-05 05:12:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:18,139 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 14265 transitions. [2021-06-05 05:12:18,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 14265 transitions. [2021-06-05 05:12:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:18,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:18,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:18,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 05:12:18,345 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:18,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1314236017, now seen corresponding path program 15 times [2021-06-05 05:12:18,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:18,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903966617] [2021-06-05 05:12:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:18,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903966617] [2021-06-05 05:12:18,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903966617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568473160] [2021-06-05 05:12:18,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:18,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:18,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:12:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:18,669 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:12:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 05:12:18,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,697 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 05:12:18,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 05:12:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568473160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:18,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:12:18,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785535403] [2021-06-05 05:12:18,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:12:18,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:12:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:18,744 INFO L87 Difference]: Start difference. First operand 3413 states and 14265 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:19,288 INFO L93 Difference]: Finished difference Result 3707 states and 15400 transitions. [2021-06-05 05:12:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:19,296 INFO L225 Difference]: With dead ends: 3707 [2021-06-05 05:12:19,296 INFO L226 Difference]: Without dead ends: 3684 [2021-06-05 05:12:19,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-05 05:12:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3401. [2021-06-05 05:12:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 4.179705882352941) internal successors, (14211), 3400 states have internal predecessors, (14211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 14211 transitions. [2021-06-05 05:12:19,341 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 14211 transitions. Word has length 23 [2021-06-05 05:12:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:19,341 INFO L482 AbstractCegarLoop]: Abstraction has 3401 states and 14211 transitions. [2021-06-05 05:12:19,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 14211 transitions. [2021-06-05 05:12:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:19,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:19,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:19,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,547 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -924097361, now seen corresponding path program 7 times [2021-06-05 05:12:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:19,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216246884] [2021-06-05 05:12:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:19,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:19,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216246884] [2021-06-05 05:12:19,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216246884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233685567] [2021-06-05 05:12:19,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:19,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:19,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:19,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:19,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:20,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233685567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:20,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:20,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707147394] [2021-06-05 05:12:20,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:20,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:20,004 INFO L87 Difference]: Start difference. First operand 3401 states and 14211 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:20,662 INFO L93 Difference]: Finished difference Result 3778 states and 15679 transitions. [2021-06-05 05:12:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:20,670 INFO L225 Difference]: With dead ends: 3778 [2021-06-05 05:12:20,670 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 05:12:20,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 05:12:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3433. [2021-06-05 05:12:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 4.181235431235431) internal successors, (14350), 3432 states have internal predecessors, (14350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 14350 transitions. [2021-06-05 05:12:20,717 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 14350 transitions. Word has length 23 [2021-06-05 05:12:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:20,717 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 14350 transitions. [2021-06-05 05:12:20,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 14350 transitions. [2021-06-05 05:12:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:20,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:20,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:20,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:20,924 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1346031629, now seen corresponding path program 8 times [2021-06-05 05:12:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:20,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891248264] [2021-06-05 05:12:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:21,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891248264] [2021-06-05 05:12:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891248264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297791995] [2021-06-05 05:12:21,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:21,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:21,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:21,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:12:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:21,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:21,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:21,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:21,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 33 [2021-06-05 05:12:21,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:21,254 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.5 percent of original size [2021-06-05 05:12:21,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:21,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:42 [2021-06-05 05:12:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:21,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297791995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:21,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:21,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:21,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494199246] [2021-06-05 05:12:21,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:21,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:21,363 INFO L87 Difference]: Start difference. First operand 3433 states and 14350 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:21,901 INFO L93 Difference]: Finished difference Result 3990 states and 16510 transitions. [2021-06-05 05:12:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:21,909 INFO L225 Difference]: With dead ends: 3990 [2021-06-05 05:12:21,909 INFO L226 Difference]: Without dead ends: 3949 [2021-06-05 05:12:21,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:12:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-06-05 05:12:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3469. [2021-06-05 05:12:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 4.1833910034602075) internal successors, (14508), 3468 states have internal predecessors, (14508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 14508 transitions. [2021-06-05 05:12:21,957 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 14508 transitions. Word has length 23 [2021-06-05 05:12:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:21,957 INFO L482 AbstractCegarLoop]: Abstraction has 3469 states and 14508 transitions. [2021-06-05 05:12:21,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 14508 transitions. [2021-06-05 05:12:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:21,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:21,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:22,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,163 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:22,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2042774707, now seen corresponding path program 9 times [2021-06-05 05:12:22,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:22,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900567355] [2021-06-05 05:12:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900567355] [2021-06-05 05:12:22,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900567355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865771728] [2021-06-05 05:12:22,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:12:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,488 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:12:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:12:22,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 05:12:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865771728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:12:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11414927] [2021-06-05 05:12:22,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:12:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:12:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:22,623 INFO L87 Difference]: Start difference. First operand 3469 states and 14508 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:23,764 INFO L93 Difference]: Finished difference Result 4269 states and 17622 transitions. [2021-06-05 05:12:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:12:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:23,773 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 05:12:23,773 INFO L226 Difference]: Without dead ends: 4213 [2021-06-05 05:12:23,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:12:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-06-05 05:12:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3492. [2021-06-05 05:12:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 4.182182755657405) internal successors, (14600), 3491 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 14600 transitions. [2021-06-05 05:12:23,823 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 14600 transitions. Word has length 23 [2021-06-05 05:12:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:23,823 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 14600 transitions. [2021-06-05 05:12:23,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 14600 transitions. [2021-06-05 05:12:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:23,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:23,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:24,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:12:24,030 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1176481433, now seen corresponding path program 10 times [2021-06-05 05:12:24,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:24,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775202514] [2021-06-05 05:12:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:24,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775202514] [2021-06-05 05:12:24,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775202514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371133101] [2021-06-05 05:12:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:24,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:24,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:24,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371133101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:24,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:24,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188019545] [2021-06-05 05:12:24,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:24,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:24,395 INFO L87 Difference]: Start difference. First operand 3492 states and 14600 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:25,309 INFO L93 Difference]: Finished difference Result 3951 states and 16393 transitions. [2021-06-05 05:12:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:25,318 INFO L225 Difference]: With dead ends: 3951 [2021-06-05 05:12:25,318 INFO L226 Difference]: Without dead ends: 3928 [2021-06-05 05:12:25,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:12:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-06-05 05:12:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3486. [2021-06-05 05:12:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 4.182496413199426) internal successors, (14576), 3485 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 14576 transitions. [2021-06-05 05:12:25,375 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 14576 transitions. Word has length 23 [2021-06-05 05:12:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:25,375 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 14576 transitions. [2021-06-05 05:12:25,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 14576 transitions. [2021-06-05 05:12:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:25,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:25,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:25,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 05:12:25,582 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1620238247, now seen corresponding path program 11 times [2021-06-05 05:12:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73480809] [2021-06-05 05:12:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:25,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73480809] [2021-06-05 05:12:25,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73480809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107565953] [2021-06-05 05:12:25,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:25,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:25,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:25,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:25,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:25,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:25,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:25,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:25,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107565953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:25,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:25,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054615104] [2021-06-05 05:12:25,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:25,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:25,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:25,997 INFO L87 Difference]: Start difference. First operand 3486 states and 14576 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:26,693 INFO L93 Difference]: Finished difference Result 4019 states and 16669 transitions. [2021-06-05 05:12:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:26,700 INFO L225 Difference]: With dead ends: 4019 [2021-06-05 05:12:26,700 INFO L226 Difference]: Without dead ends: 3994 [2021-06-05 05:12:26,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-06-05 05:12:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3490. [2021-06-05 05:12:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3489 states have (on average 4.182287188306105) internal successors, (14592), 3489 states have internal predecessors, (14592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 14592 transitions. [2021-06-05 05:12:26,743 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 14592 transitions. Word has length 23 [2021-06-05 05:12:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:26,743 INFO L482 AbstractCegarLoop]: Abstraction has 3490 states and 14592 transitions. [2021-06-05 05:12:26,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 14592 transitions. [2021-06-05 05:12:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:26,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:26,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:26,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 05:12:26,948 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1605375419, now seen corresponding path program 12 times [2021-06-05 05:12:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:26,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228545015] [2021-06-05 05:12:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:27,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:27,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228545015] [2021-06-05 05:12:27,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228545015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551348380] [2021-06-05 05:12:27,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:27,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:12:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:27,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:27,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:27,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:27,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551348380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902442711] [2021-06-05 05:12:27,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:27,337 INFO L87 Difference]: Start difference. First operand 3490 states and 14592 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:28,151 INFO L93 Difference]: Finished difference Result 4384 states and 18075 transitions. [2021-06-05 05:12:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:28,161 INFO L225 Difference]: With dead ends: 4384 [2021-06-05 05:12:28,161 INFO L226 Difference]: Without dead ends: 4349 [2021-06-05 05:12:28,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 642.7ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-06-05 05:12:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3518. [2021-06-05 05:12:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 4.182541939152687) internal successors, (14710), 3517 states have internal predecessors, (14710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 14710 transitions. [2021-06-05 05:12:28,218 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 14710 transitions. Word has length 23 [2021-06-05 05:12:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:28,218 INFO L482 AbstractCegarLoop]: Abstraction has 3518 states and 14710 transitions. [2021-06-05 05:12:28,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 14710 transitions. [2021-06-05 05:12:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:28,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:28,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:28,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:12:28,424 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2101846555, now seen corresponding path program 13 times [2021-06-05 05:12:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:28,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427792408] [2021-06-05 05:12:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:28,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:28,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427792408] [2021-06-05 05:12:28,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427792408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527658361] [2021-06-05 05:12:28,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:28,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:28,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:28,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:28,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527658361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:28,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:28,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737035275] [2021-06-05 05:12:28,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:28,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:28,811 INFO L87 Difference]: Start difference. First operand 3518 states and 14710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:29,630 INFO L93 Difference]: Finished difference Result 4183 states and 17298 transitions. [2021-06-05 05:12:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:29,638 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 05:12:29,638 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 05:12:29,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 05:12:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3524. [2021-06-05 05:12:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 4.182231053079762) internal successors, (14734), 3523 states have internal predecessors, (14734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 14734 transitions. [2021-06-05 05:12:29,688 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 14734 transitions. Word has length 23 [2021-06-05 05:12:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:29,688 INFO L482 AbstractCegarLoop]: Abstraction has 3524 states and 14734 transitions. [2021-06-05 05:12:29,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 14734 transitions. [2021-06-05 05:12:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:29,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:29,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:29,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 05:12:29,894 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1026135399, now seen corresponding path program 14 times [2021-06-05 05:12:29,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:29,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863844403] [2021-06-05 05:12:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863844403] [2021-06-05 05:12:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863844403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905310181] [2021-06-05 05:12:30,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:30,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:30,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:30,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:30,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:30,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:30,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:30,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905310181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:30,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:30,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661151861] [2021-06-05 05:12:30,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:30,260 INFO L87 Difference]: Start difference. First operand 3524 states and 14734 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:31,233 INFO L93 Difference]: Finished difference Result 4150 states and 17172 transitions. [2021-06-05 05:12:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:31,241 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:12:31,241 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 05:12:31,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 704.6ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 05:12:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3528. [2021-06-05 05:12:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 4.182024383328608) internal successors, (14750), 3527 states have internal predecessors, (14750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 14750 transitions. [2021-06-05 05:12:31,289 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 14750 transitions. Word has length 23 [2021-06-05 05:12:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:31,289 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 14750 transitions. [2021-06-05 05:12:31,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 14750 transitions. [2021-06-05 05:12:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:31,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:31,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:31,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:31,495 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash -181439147, now seen corresponding path program 15 times [2021-06-05 05:12:31,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:31,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901564483] [2021-06-05 05:12:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901564483] [2021-06-05 05:12:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901564483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687965587] [2021-06-05 05:12:31,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:31,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:31,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:12:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:31,802 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 05:12:31,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 66 [2021-06-05 05:12:31,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:31,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:31,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:31,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 05:12:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:31,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687965587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:31,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:31,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:12:31,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211901034] [2021-06-05 05:12:31,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:12:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:12:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:31,855 INFO L87 Difference]: Start difference. First operand 3528 states and 14750 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:32,592 INFO L93 Difference]: Finished difference Result 4348 states and 17995 transitions. [2021-06-05 05:12:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:12:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:32,604 INFO L225 Difference]: With dead ends: 4348 [2021-06-05 05:12:32,604 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 05:12:32,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:12:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 05:12:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3552. [2021-06-05 05:12:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 4.18445508307519) internal successors, (14859), 3551 states have internal predecessors, (14859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 14859 transitions. [2021-06-05 05:12:32,664 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 14859 transitions. Word has length 23 [2021-06-05 05:12:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:32,665 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 14859 transitions. [2021-06-05 05:12:32,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 14859 transitions. [2021-06-05 05:12:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:32,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:32,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:32,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 05:12:32,870 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1087600107, now seen corresponding path program 16 times [2021-06-05 05:12:32,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135531117] [2021-06-05 05:12:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:33,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:33,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135531117] [2021-06-05 05:12:33,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135531117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767036172] [2021-06-05 05:12:33,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:33,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:33,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:33,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:33,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:33,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:33,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:33,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767036172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:33,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:33,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324628065] [2021-06-05 05:12:33,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:33,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:33,245 INFO L87 Difference]: Start difference. First operand 3552 states and 14859 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:34,079 INFO L93 Difference]: Finished difference Result 4096 states and 16971 transitions. [2021-06-05 05:12:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:34,088 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 05:12:34,088 INFO L226 Difference]: Without dead ends: 4068 [2021-06-05 05:12:34,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:12:34,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-06-05 05:12:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 3558. [2021-06-05 05:12:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3557 states have (on average 4.184143941523756) internal successors, (14883), 3557 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 14883 transitions. [2021-06-05 05:12:34,142 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 14883 transitions. Word has length 23 [2021-06-05 05:12:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:34,142 INFO L482 AbstractCegarLoop]: Abstraction has 3558 states and 14883 transitions. [2021-06-05 05:12:34,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 14883 transitions. [2021-06-05 05:12:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:34,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:34,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:34,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:34,349 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash -11888951, now seen corresponding path program 17 times [2021-06-05 05:12:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:34,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676813493] [2021-06-05 05:12:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:34,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676813493] [2021-06-05 05:12:34,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676813493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948178561] [2021-06-05 05:12:34,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:34,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:34,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:34,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:34,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948178561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:34,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:34,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211889216] [2021-06-05 05:12:34,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:34,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:34,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:34,715 INFO L87 Difference]: Start difference. First operand 3558 states and 14883 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:35,542 INFO L93 Difference]: Finished difference Result 4117 states and 17059 transitions. [2021-06-05 05:12:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:35,550 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 05:12:35,550 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 05:12:35,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 681.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 05:12:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3546. [2021-06-05 05:12:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 4.18392101551481) internal successors, (14832), 3545 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 14832 transitions. [2021-06-05 05:12:35,604 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 14832 transitions. Word has length 23 [2021-06-05 05:12:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:35,605 INFO L482 AbstractCegarLoop]: Abstraction has 3546 states and 14832 transitions. [2021-06-05 05:12:35,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 14832 transitions. [2021-06-05 05:12:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:35,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:35,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:35,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 05:12:35,811 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash -346648009, now seen corresponding path program 18 times [2021-06-05 05:12:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:35,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900893946] [2021-06-05 05:12:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:35,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:35,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900893946] [2021-06-05 05:12:35,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900893946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:35,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110750640] [2021-06-05 05:12:35,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:35,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:35,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:36,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:36,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:36,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110750640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:36,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292667066] [2021-06-05 05:12:36,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:36,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:36,163 INFO L87 Difference]: Start difference. First operand 3546 states and 14832 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:37,046 INFO L93 Difference]: Finished difference Result 4439 states and 18330 transitions. [2021-06-05 05:12:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:37,055 INFO L225 Difference]: With dead ends: 4439 [2021-06-05 05:12:37,055 INFO L226 Difference]: Without dead ends: 4408 [2021-06-05 05:12:37,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:12:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-06-05 05:12:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3563. [2021-06-05 05:12:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 4.1869736103312745) internal successors, (14914), 3562 states have internal predecessors, (14914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 14914 transitions. [2021-06-05 05:12:37,115 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 14914 transitions. Word has length 23 [2021-06-05 05:12:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:37,115 INFO L482 AbstractCegarLoop]: Abstraction has 3563 states and 14914 transitions. [2021-06-05 05:12:37,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 14914 transitions. [2021-06-05 05:12:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:37,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:37,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:37,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 05:12:37,321 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash 241097313, now seen corresponding path program 19 times [2021-06-05 05:12:37,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:37,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176479233] [2021-06-05 05:12:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176479233] [2021-06-05 05:12:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176479233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990463832] [2021-06-05 05:12:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:37,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:37,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:37,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:37,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:37,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990463832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:37,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793054348] [2021-06-05 05:12:37,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:37,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:37,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:37,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:37,693 INFO L87 Difference]: Start difference. First operand 3563 states and 14914 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:38,574 INFO L93 Difference]: Finished difference Result 4196 states and 17379 transitions. [2021-06-05 05:12:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:12:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:38,581 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 05:12:38,581 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 05:12:38,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 786.2ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 05:12:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3569. [2021-06-05 05:12:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3568 states have (on average 4.186659192825112) internal successors, (14938), 3568 states have internal predecessors, (14938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 14938 transitions. [2021-06-05 05:12:38,625 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 14938 transitions. Word has length 23 [2021-06-05 05:12:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:38,626 INFO L482 AbstractCegarLoop]: Abstraction has 3569 states and 14938 transitions. [2021-06-05 05:12:38,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 14938 transitions. [2021-06-05 05:12:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:38,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:38,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:38,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,833 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1316808469, now seen corresponding path program 20 times [2021-06-05 05:12:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:38,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756427985] [2021-06-05 05:12:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:38,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756427985] [2021-06-05 05:12:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756427985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144469310] [2021-06-05 05:12:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:39,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:39,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:39,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:39,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:39,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144469310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:39,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772641637] [2021-06-05 05:12:39,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:39,222 INFO L87 Difference]: Start difference. First operand 3569 states and 14938 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:40,010 INFO L93 Difference]: Finished difference Result 4238 states and 17551 transitions. [2021-06-05 05:12:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:40,018 INFO L225 Difference]: With dead ends: 4238 [2021-06-05 05:12:40,018 INFO L226 Difference]: Without dead ends: 4215 [2021-06-05 05:12:40,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-06-05 05:12:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3559. [2021-06-05 05:12:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 4.188026981450253) internal successors, (14901), 3558 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 14901 transitions. [2021-06-05 05:12:40,104 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 14901 transitions. Word has length 23 [2021-06-05 05:12:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:40,104 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 14901 transitions. [2021-06-05 05:12:40,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 14901 transitions. [2021-06-05 05:12:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:40,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:40,109 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:40,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,310 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:40,310 INFO L82 PathProgramCache]: Analyzing trace with hash -355517803, now seen corresponding path program 21 times [2021-06-05 05:12:40,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:40,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547127943] [2021-06-05 05:12:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:40,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547127943] [2021-06-05 05:12:40,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547127943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153671197] [2021-06-05 05:12:40,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:40,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:40,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:40,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:40,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:40,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:40,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153671197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:40,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:40,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990528664] [2021-06-05 05:12:40,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:40,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:40,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:40,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:40,664 INFO L87 Difference]: Start difference. First operand 3559 states and 14901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:41,231 INFO L93 Difference]: Finished difference Result 4037 states and 16762 transitions. [2021-06-05 05:12:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,239 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 05:12:41,239 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 05:12:41,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:12:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 05:12:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3580. [2021-06-05 05:12:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 4.186644314054205) internal successors, (14984), 3579 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 14984 transitions. [2021-06-05 05:12:41,294 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 14984 transitions. Word has length 23 [2021-06-05 05:12:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:41,294 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 14984 transitions. [2021-06-05 05:12:41,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 14984 transitions. [2021-06-05 05:12:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:41,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:41,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:41,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,500 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1684215223, now seen corresponding path program 22 times [2021-06-05 05:12:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:41,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957495064] [2021-06-05 05:12:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:41,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957495064] [2021-06-05 05:12:41,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957495064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548942006] [2021-06-05 05:12:41,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:41,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:41,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:41,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:41,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:41,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:41,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548942006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:41,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971989774] [2021-06-05 05:12:41,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:41,858 INFO L87 Difference]: Start difference. First operand 3580 states and 14984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:42,565 INFO L93 Difference]: Finished difference Result 4267 states and 17666 transitions. [2021-06-05 05:12:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:42,575 INFO L225 Difference]: With dead ends: 4267 [2021-06-05 05:12:42,575 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 05:12:42,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 553.5ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:12:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 05:12:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3586. [2021-06-05 05:12:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 4.18744769874477) internal successors, (15012), 3585 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 15012 transitions. [2021-06-05 05:12:42,628 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 15012 transitions. Word has length 23 [2021-06-05 05:12:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,628 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 15012 transitions. [2021-06-05 05:12:42,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 15012 transitions. [2021-06-05 05:12:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:42,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:42,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,834 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1096469901, now seen corresponding path program 23 times [2021-06-05 05:12:42,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:42,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239694740] [2021-06-05 05:12:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:42,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:42,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239694740] [2021-06-05 05:12:42,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239694740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031977608] [2021-06-05 05:12:42,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:12:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:43,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:43,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:12:43,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:43,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:43,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:43,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:12:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031977608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:43,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:43,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062160535] [2021-06-05 05:12:43,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:43,175 INFO L87 Difference]: Start difference. First operand 3586 states and 15012 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:43,672 INFO L93 Difference]: Finished difference Result 4118 states and 17067 transitions. [2021-06-05 05:12:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:43,680 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 05:12:43,680 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 05:12:43,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:12:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 05:12:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3592. [2021-06-05 05:12:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.187134502923977) internal successors, (15036), 3591 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15036 transitions. [2021-06-05 05:12:43,728 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15036 transitions. Word has length 23 [2021-06-05 05:12:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:43,728 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15036 transitions. [2021-06-05 05:12:43,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15036 transitions. [2021-06-05 05:12:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:43,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:43,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:43,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:12:43,934 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash -20758745, now seen corresponding path program 24 times [2021-06-05 05:12:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:43,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899450807] [2021-06-05 05:12:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899450807] [2021-06-05 05:12:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899450807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033619228] [2021-06-05 05:12:44,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:44,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:44,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:44,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:44,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:44,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:44,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:44,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:44,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033619228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:44,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:44,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588514147] [2021-06-05 05:12:44,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:44,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:44,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:44,350 INFO L87 Difference]: Start difference. First operand 3592 states and 15036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:45,121 INFO L93 Difference]: Finished difference Result 4150 states and 17202 transitions. [2021-06-05 05:12:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:45,129 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:12:45,129 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 05:12:45,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:12:45,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 05:12:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3580. [2021-06-05 05:12:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 4.186644314054205) internal successors, (14984), 3579 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 14984 transitions. [2021-06-05 05:12:45,181 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 14984 transitions. Word has length 23 [2021-06-05 05:12:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:45,181 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 14984 transitions. [2021-06-05 05:12:45,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 14984 transitions. [2021-06-05 05:12:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:45,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:45,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:45,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:12:45,411 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1454372855, now seen corresponding path program 25 times [2021-06-05 05:12:45,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:45,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297000408] [2021-06-05 05:12:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297000408] [2021-06-05 05:12:45,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297000408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732395835] [2021-06-05 05:12:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:45,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:45,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:45,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:45,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:45,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732395835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:45,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390188065] [2021-06-05 05:12:45,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:45,755 INFO L87 Difference]: Start difference. First operand 3580 states and 14984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:46,414 INFO L93 Difference]: Finished difference Result 4354 states and 18034 transitions. [2021-06-05 05:12:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:46,423 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 05:12:46,423 INFO L226 Difference]: Without dead ends: 4330 [2021-06-05 05:12:46,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2021-06-05 05:12:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 3598. [2021-06-05 05:12:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.18960244648318) internal successors, (15070), 3597 states have internal predecessors, (15070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15070 transitions. [2021-06-05 05:12:46,479 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15070 transitions. Word has length 23 [2021-06-05 05:12:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:46,479 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15070 transitions. [2021-06-05 05:12:46,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15070 transitions. [2021-06-05 05:12:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:46,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:46,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:46,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 05:12:46,685 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1934433481, now seen corresponding path program 26 times [2021-06-05 05:12:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:46,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999234750] [2021-06-05 05:12:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:46,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999234750] [2021-06-05 05:12:46,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999234750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077922273] [2021-06-05 05:12:46,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:46,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:46,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:46,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:46,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:46,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:46,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:47,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:47,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077922273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:47,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:47,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598276554] [2021-06-05 05:12:47,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:47,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:47,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:47,090 INFO L87 Difference]: Start difference. First operand 3598 states and 15070 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:47,944 INFO L93 Difference]: Finished difference Result 4209 states and 17438 transitions. [2021-06-05 05:12:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:47,953 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 05:12:47,953 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 05:12:47,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:12:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 05:12:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3604. [2021-06-05 05:12:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.189286705523175) internal successors, (15094), 3603 states have internal predecessors, (15094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15094 transitions. [2021-06-05 05:12:48,010 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15094 transitions. Word has length 23 [2021-06-05 05:12:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:48,010 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15094 transitions. [2021-06-05 05:12:48,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15094 transitions. [2021-06-05 05:12:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:48,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:48,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:48,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:48,220 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:48,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1284822659, now seen corresponding path program 27 times [2021-06-05 05:12:48,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:48,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100309161] [2021-06-05 05:12:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:48,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100309161] [2021-06-05 05:12:48,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100309161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163470975] [2021-06-05 05:12:48,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:48,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:48,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:48,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:48,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:48,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:48,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:48,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163470975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:48,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:48,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913439253] [2021-06-05 05:12:48,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:48,662 INFO L87 Difference]: Start difference. First operand 3604 states and 15094 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:49,341 INFO L93 Difference]: Finished difference Result 4143 states and 17189 transitions. [2021-06-05 05:12:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:49,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:49,351 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 05:12:49,351 INFO L226 Difference]: Without dead ends: 4120 [2021-06-05 05:12:49,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-06-05 05:12:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3592. [2021-06-05 05:12:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.189083820662768) internal successors, (15043), 3591 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15043 transitions. [2021-06-05 05:12:49,410 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15043 transitions. Word has length 23 [2021-06-05 05:12:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:49,411 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15043 transitions. [2021-06-05 05:12:49,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15043 transitions. [2021-06-05 05:12:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:49,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:49,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:49,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:49,621 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1619581717, now seen corresponding path program 28 times [2021-06-05 05:12:49,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:49,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868690785] [2021-06-05 05:12:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:49,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:49,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868690785] [2021-06-05 05:12:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868690785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454473478] [2021-06-05 05:12:49,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:49,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:49,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:49,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:49,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:49,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:49,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:49,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:49,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:50,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454473478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:50,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:50,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329229611] [2021-06-05 05:12:50,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:50,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:50,058 INFO L87 Difference]: Start difference. First operand 3592 states and 15043 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:50,963 INFO L93 Difference]: Finished difference Result 4535 states and 18740 transitions. [2021-06-05 05:12:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:12:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:50,972 INFO L225 Difference]: With dead ends: 4535 [2021-06-05 05:12:50,972 INFO L226 Difference]: Without dead ends: 4504 [2021-06-05 05:12:50,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 805.9ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-06-05 05:12:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3598. [2021-06-05 05:12:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.189880455935501) internal successors, (15071), 3597 states have internal predecessors, (15071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15071 transitions. [2021-06-05 05:12:51,026 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15071 transitions. Word has length 23 [2021-06-05 05:12:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:51,026 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15071 transitions. [2021-06-05 05:12:51,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15071 transitions. [2021-06-05 05:12:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:51,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:51,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:51,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 05:12:51,232 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1031836395, now seen corresponding path program 29 times [2021-06-05 05:12:51,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:51,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958136037] [2021-06-05 05:12:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:51,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:51,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958136037] [2021-06-05 05:12:51,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958136037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:51,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68227848] [2021-06-05 05:12:51,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:51,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:51,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:51,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:51,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:51,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:51,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:51,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:51,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68227848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:51,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:51,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385748743] [2021-06-05 05:12:51,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:51,611 INFO L87 Difference]: Start difference. First operand 3598 states and 15071 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:52,572 INFO L93 Difference]: Finished difference Result 4267 states and 17671 transitions. [2021-06-05 05:12:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:12:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:52,580 INFO L225 Difference]: With dead ends: 4267 [2021-06-05 05:12:52,580 INFO L226 Difference]: Without dead ends: 4239 [2021-06-05 05:12:52,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 852.5ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-06-05 05:12:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3604. [2021-06-05 05:12:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.189564252012212) internal successors, (15095), 3603 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15095 transitions. [2021-06-05 05:12:52,634 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15095 transitions. Word has length 23 [2021-06-05 05:12:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:52,634 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15095 transitions. [2021-06-05 05:12:52,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15095 transitions. [2021-06-05 05:12:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:52,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:52,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:52,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 05:12:52,840 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 43874761, now seen corresponding path program 30 times [2021-06-05 05:12:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:52,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415288680] [2021-06-05 05:12:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:52,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415288680] [2021-06-05 05:12:52,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415288680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587487131] [2021-06-05 05:12:52,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:53,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:53,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:53,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:53,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:53,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:53,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:53,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:53,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587487131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:53,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:53,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220423969] [2021-06-05 05:12:53,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:53,207 INFO L87 Difference]: Start difference. First operand 3604 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:54,007 INFO L93 Difference]: Finished difference Result 4173 states and 17310 transitions. [2021-06-05 05:12:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:54,017 INFO L225 Difference]: With dead ends: 4173 [2021-06-05 05:12:54,017 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 05:12:54,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 727.5ms TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 05:12:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3586. [2021-06-05 05:12:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 4.18744769874477) internal successors, (15012), 3585 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 15012 transitions. [2021-06-05 05:12:54,073 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 15012 transitions. Word has length 23 [2021-06-05 05:12:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:54,073 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 15012 transitions. [2021-06-05 05:12:54,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 15012 transitions. [2021-06-05 05:12:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:54,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:54,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:54,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:54,281 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 728165811, now seen corresponding path program 31 times [2021-06-05 05:12:54,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:54,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284311475] [2021-06-05 05:12:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:54,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:54,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284311475] [2021-06-05 05:12:54,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284311475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198719574] [2021-06-05 05:12:54,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:54,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:54,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:54,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:54,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:54,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:54,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:54,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:54,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:54,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198719574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:54,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030029378] [2021-06-05 05:12:54,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:54,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:54,647 INFO L87 Difference]: Start difference. First operand 3586 states and 15012 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:55,240 INFO L93 Difference]: Finished difference Result 4168 states and 17295 transitions. [2021-06-05 05:12:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:55,248 INFO L225 Difference]: With dead ends: 4168 [2021-06-05 05:12:55,248 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 05:12:55,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:12:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 05:12:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3598. [2021-06-05 05:12:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.18765638031693) internal successors, (15063), 3597 states have internal predecessors, (15063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15063 transitions. [2021-06-05 05:12:55,298 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15063 transitions. Word has length 23 [2021-06-05 05:12:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:55,298 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15063 transitions. [2021-06-05 05:12:55,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15063 transitions. [2021-06-05 05:12:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:55,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:55,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:55,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:55,513 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -177995149, now seen corresponding path program 32 times [2021-06-05 05:12:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:55,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067233068] [2021-06-05 05:12:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:55,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:55,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067233068] [2021-06-05 05:12:55,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067233068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248435482] [2021-06-05 05:12:55,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:55,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:55,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:55,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:55,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:55,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248435482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:55,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145777304] [2021-06-05 05:12:55,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:55,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:55,865 INFO L87 Difference]: Start difference. First operand 3598 states and 15063 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:56,606 INFO L93 Difference]: Finished difference Result 4118 states and 17070 transitions. [2021-06-05 05:12:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:12:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:56,614 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 05:12:56,614 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 05:12:56,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:12:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 05:12:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3604. [2021-06-05 05:12:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.187343880099917) internal successors, (15087), 3603 states have internal predecessors, (15087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15087 transitions. [2021-06-05 05:12:56,692 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15087 transitions. Word has length 23 [2021-06-05 05:12:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:56,692 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15087 transitions. [2021-06-05 05:12:56,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15087 transitions. [2021-06-05 05:12:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:56,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:56,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:56,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:56,898 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash 897716007, now seen corresponding path program 33 times [2021-06-05 05:12:56,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:56,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679889999] [2021-06-05 05:12:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:57,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679889999] [2021-06-05 05:12:57,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679889999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249125413] [2021-06-05 05:12:57,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:57,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:12:57,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:12:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249125413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:57,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:57,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939121818] [2021-06-05 05:12:57,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:57,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:57,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:57,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:57,267 INFO L87 Difference]: Start difference. First operand 3604 states and 15087 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:58,008 INFO L93 Difference]: Finished difference Result 4016 states and 16685 transitions. [2021-06-05 05:12:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:58,017 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 05:12:58,017 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 05:12:58,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 05:12:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3592. [2021-06-05 05:12:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.187134502923977) internal successors, (15036), 3591 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15036 transitions. [2021-06-05 05:12:58,068 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15036 transitions. Word has length 23 [2021-06-05 05:12:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:58,068 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15036 transitions. [2021-06-05 05:12:58,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15036 transitions. [2021-06-05 05:12:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:58,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:58,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:58,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:58,274 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash -600531609, now seen corresponding path program 34 times [2021-06-05 05:12:58,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:58,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037925864] [2021-06-05 05:12:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:58,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:58,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037925864] [2021-06-05 05:12:58,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037925864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:58,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588595626] [2021-06-05 05:12:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:58,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:58,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:58,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:58,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:58,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:58,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:58,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:58,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588595626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:58,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:58,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:58,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561328722] [2021-06-05 05:12:58,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:58,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:58,631 INFO L87 Difference]: Start difference. First operand 3592 states and 15036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:59,130 INFO L93 Difference]: Finished difference Result 4019 states and 16700 transitions. [2021-06-05 05:12:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:59,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:12:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:59,139 INFO L225 Difference]: With dead ends: 4019 [2021-06-05 05:12:59,139 INFO L226 Difference]: Without dead ends: 3994 [2021-06-05 05:12:59,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-06-05 05:12:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3584. [2021-06-05 05:12:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 4.188110521909015) internal successors, (15006), 3583 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 15006 transitions. [2021-06-05 05:12:59,191 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 15006 transitions. Word has length 23 [2021-06-05 05:12:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:59,191 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 15006 transitions. [2021-06-05 05:12:59,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 15006 transitions. [2021-06-05 05:12:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:12:59,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:59,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:59,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 05:12:59,397 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash -893511691, now seen corresponding path program 16 times [2021-06-05 05:12:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:59,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887293516] [2021-06-05 05:12:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:59,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:59,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887293516] [2021-06-05 05:12:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887293516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302253770] [2021-06-05 05:12:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:59,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:59,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:59,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:12:59,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:59,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:59,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:59,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:12:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:59,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302253770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:59,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:59,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071382551] [2021-06-05 05:12:59,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:59,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:59,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:59,750 INFO L87 Difference]: Start difference. First operand 3584 states and 15006 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:00,434 INFO L93 Difference]: Finished difference Result 3769 states and 15694 transitions. [2021-06-05 05:13:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:00,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:00,442 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 05:13:00,442 INFO L226 Difference]: Without dead ends: 3754 [2021-06-05 05:13:00,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:13:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-06-05 05:13:00,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3584. [2021-06-05 05:13:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 4.188110521909015) internal successors, (15006), 3583 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 15006 transitions. [2021-06-05 05:13:00,491 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 15006 transitions. Word has length 23 [2021-06-05 05:13:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:00,491 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 15006 transitions. [2021-06-05 05:13:00,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 15006 transitions. [2021-06-05 05:13:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:00,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:00,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:00,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 05:13:00,697 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash -442965643, now seen corresponding path program 17 times [2021-06-05 05:13:00,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:00,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072604306] [2021-06-05 05:13:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:00,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:00,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072604306] [2021-06-05 05:13:00,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072604306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:00,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313554615] [2021-06-05 05:13:00,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:00,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:00,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:00,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:00,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:00,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:01,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313554615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:01,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:01,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802629152] [2021-06-05 05:13:01,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:01,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:01,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:01,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:01,048 INFO L87 Difference]: Start difference. First operand 3584 states and 15006 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:01,872 INFO L93 Difference]: Finished difference Result 3754 states and 15638 transitions. [2021-06-05 05:13:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:01,878 INFO L225 Difference]: With dead ends: 3754 [2021-06-05 05:13:01,879 INFO L226 Difference]: Without dead ends: 3732 [2021-06-05 05:13:01,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-06-05 05:13:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3576. [2021-06-05 05:13:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 4.187972027972028) internal successors, (14972), 3575 states have internal predecessors, (14972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 14972 transitions. [2021-06-05 05:13:01,920 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 14972 transitions. Word has length 23 [2021-06-05 05:13:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:01,920 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 14972 transitions. [2021-06-05 05:13:01,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 14972 transitions. [2021-06-05 05:13:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:01,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:01,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:02,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:02,125 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -873862077, now seen corresponding path program 18 times [2021-06-05 05:13:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:02,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848758148] [2021-06-05 05:13:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:02,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:02,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848758148] [2021-06-05 05:13:02,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848758148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805064205] [2021-06-05 05:13:02,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:02,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:02,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 05:13:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 05:13:02,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:02,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:02,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:02,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 05:13:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:02,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805064205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:02,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372942291] [2021-06-05 05:13:02,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:02,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:02,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:02,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:02,450 INFO L87 Difference]: Start difference. First operand 3576 states and 14972 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:02,930 INFO L93 Difference]: Finished difference Result 3980 states and 16505 transitions. [2021-06-05 05:13:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:02,937 INFO L225 Difference]: With dead ends: 3980 [2021-06-05 05:13:02,937 INFO L226 Difference]: Without dead ends: 3945 [2021-06-05 05:13:02,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-06-05 05:13:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3616. [2021-06-05 05:13:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 4.193360995850623) internal successors, (15159), 3615 states have internal predecessors, (15159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 15159 transitions. [2021-06-05 05:13:02,988 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 15159 transitions. Word has length 23 [2021-06-05 05:13:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:02,988 INFO L482 AbstractCegarLoop]: Abstraction has 3616 states and 15159 transitions. [2021-06-05 05:13:02,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 15159 transitions. [2021-06-05 05:13:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:02,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:02,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:03,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:03,194 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -209925775, now seen corresponding path program 19 times [2021-06-05 05:13:03,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:03,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478124310] [2021-06-05 05:13:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:03,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:03,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478124310] [2021-06-05 05:13:03,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478124310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:03,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672364910] [2021-06-05 05:13:03,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:03,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:03,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:03,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:03,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:03,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:03,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672364910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:03,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:03,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:03,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315852089] [2021-06-05 05:13:03,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:03,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:03,567 INFO L87 Difference]: Start difference. First operand 3616 states and 15159 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:04,165 INFO L93 Difference]: Finished difference Result 3838 states and 15999 transitions. [2021-06-05 05:13:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:04,173 INFO L225 Difference]: With dead ends: 3838 [2021-06-05 05:13:04,173 INFO L226 Difference]: Without dead ends: 3823 [2021-06-05 05:13:04,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-06-05 05:13:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3620. [2021-06-05 05:13:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193699917104173) internal successors, (15177), 3619 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15177 transitions. [2021-06-05 05:13:04,223 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15177 transitions. Word has length 23 [2021-06-05 05:13:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:04,223 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15177 transitions. [2021-06-05 05:13:04,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15177 transitions. [2021-06-05 05:13:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:04,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:04,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:04,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:04,429 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash -631860043, now seen corresponding path program 20 times [2021-06-05 05:13:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:04,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657305420] [2021-06-05 05:13:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:04,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:04,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657305420] [2021-06-05 05:13:04,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657305420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:04,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111289918] [2021-06-05 05:13:04,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:04,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:04,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:04,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:04,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 05:13:04,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:04,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:04,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:13:04,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 05:13:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:04,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111289918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:04,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:04,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:13:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879742946] [2021-06-05 05:13:04,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:13:04,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:04,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:13:04,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:04,750 INFO L87 Difference]: Start difference. First operand 3620 states and 15177 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:05,321 INFO L93 Difference]: Finished difference Result 3859 states and 16075 transitions. [2021-06-05 05:13:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:05,328 INFO L225 Difference]: With dead ends: 3859 [2021-06-05 05:13:05,328 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 05:13:05,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 05:13:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3628. [2021-06-05 05:13:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193824097049903) internal successors, (15211), 3627 states have internal predecessors, (15211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15211 transitions. [2021-06-05 05:13:05,377 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15211 transitions. Word has length 23 [2021-06-05 05:13:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:05,377 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15211 transitions. [2021-06-05 05:13:05,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15211 transitions. [2021-06-05 05:13:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:05,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:05,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:05,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:05,583 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1538021003, now seen corresponding path program 21 times [2021-06-05 05:13:05,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:05,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976413284] [2021-06-05 05:13:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:05,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976413284] [2021-06-05 05:13:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976413284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989257613] [2021-06-05 05:13:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:05,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:13:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:05,841 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:13:05,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 54 [2021-06-05 05:13:05,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:05,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:05,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:05,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:47 [2021-06-05 05:13:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:05,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989257613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:05,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:13:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689029218] [2021-06-05 05:13:05,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:13:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:13:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:05,925 INFO L87 Difference]: Start difference. First operand 3628 states and 15211 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:06,562 INFO L93 Difference]: Finished difference Result 4007 states and 16672 transitions. [2021-06-05 05:13:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:13:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:06,570 INFO L225 Difference]: With dead ends: 4007 [2021-06-05 05:13:06,571 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 05:13:06,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 05:13:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3632. [2021-06-05 05:13:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 4.193610575599009) internal successors, (15227), 3631 states have internal predecessors, (15227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 15227 transitions. [2021-06-05 05:13:06,619 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 15227 transitions. Word has length 23 [2021-06-05 05:13:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:06,619 INFO L482 AbstractCegarLoop]: Abstraction has 3632 states and 15227 transitions. [2021-06-05 05:13:06,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 15227 transitions. [2021-06-05 05:13:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:06,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:06,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:06,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 05:13:06,825 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:06,826 INFO L82 PathProgramCache]: Analyzing trace with hash -462309847, now seen corresponding path program 22 times [2021-06-05 05:13:06,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:06,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069891880] [2021-06-05 05:13:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:06,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:06,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069891880] [2021-06-05 05:13:06,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069891880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:06,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072089188] [2021-06-05 05:13:06,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:06,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:06,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:07,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:07,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:07,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:07,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:07,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:07,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:07,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072089188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:07,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:07,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:07,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056778311] [2021-06-05 05:13:07,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:07,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:07,167 INFO L87 Difference]: Start difference. First operand 3632 states and 15227 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:07,904 INFO L93 Difference]: Finished difference Result 3856 states and 16061 transitions. [2021-06-05 05:13:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:13:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:07,912 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 05:13:07,912 INFO L226 Difference]: Without dead ends: 3841 [2021-06-05 05:13:07,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:13:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-05 05:13:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3624. [2021-06-05 05:13:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193486061275187) internal successors, (15193), 3623 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15193 transitions. [2021-06-05 05:13:07,961 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15193 transitions. Word has length 23 [2021-06-05 05:13:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:07,961 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15193 transitions. [2021-06-05 05:13:07,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15193 transitions. [2021-06-05 05:13:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:07,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:07,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:08,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 05:13:08,167 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:08,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1960557463, now seen corresponding path program 23 times [2021-06-05 05:13:08,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:08,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502731768] [2021-06-05 05:13:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:08,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:08,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502731768] [2021-06-05 05:13:08,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502731768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619352211] [2021-06-05 05:13:08,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:08,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:08,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:08,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:08,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:08,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:08,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:08,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:08,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619352211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:08,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:08,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407587425] [2021-06-05 05:13:08,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:08,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:08,550 INFO L87 Difference]: Start difference. First operand 3624 states and 15193 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:09,113 INFO L93 Difference]: Finished difference Result 3829 states and 15963 transitions. [2021-06-05 05:13:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:09,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:09,121 INFO L225 Difference]: With dead ends: 3829 [2021-06-05 05:13:09,121 INFO L226 Difference]: Without dead ends: 3814 [2021-06-05 05:13:09,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:13:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-06-05 05:13:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3616. [2021-06-05 05:13:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 4.193360995850623) internal successors, (15159), 3615 states have internal predecessors, (15159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 15159 transitions. [2021-06-05 05:13:09,170 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 15159 transitions. Word has length 23 [2021-06-05 05:13:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:09,170 INFO L482 AbstractCegarLoop]: Abstraction has 3616 states and 15159 transitions. [2021-06-05 05:13:09,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 15159 transitions. [2021-06-05 05:13:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:09,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:09,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:09,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:09,376 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1788483957, now seen corresponding path program 24 times [2021-06-05 05:13:09,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:09,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761630871] [2021-06-05 05:13:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:09,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:09,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761630871] [2021-06-05 05:13:09,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761630871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:09,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964248924] [2021-06-05 05:13:09,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:09,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:09,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:09,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:09,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:09,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:09,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:09,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:09,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964248924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:09,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:09,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:09,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698108283] [2021-06-05 05:13:09,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:09,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:09,726 INFO L87 Difference]: Start difference. First operand 3616 states and 15159 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:10,377 INFO L93 Difference]: Finished difference Result 3864 states and 16107 transitions. [2021-06-05 05:13:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:10,386 INFO L225 Difference]: With dead ends: 3864 [2021-06-05 05:13:10,386 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 05:13:10,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 518.7ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 05:13:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3624. [2021-06-05 05:13:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193762075627933) internal successors, (15194), 3623 states have internal predecessors, (15194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15194 transitions. [2021-06-05 05:13:10,441 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15194 transitions. Word has length 23 [2021-06-05 05:13:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:10,442 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15194 transitions. [2021-06-05 05:13:10,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15194 transitions. [2021-06-05 05:13:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:10,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:10,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:10,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:10,653 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1921149387, now seen corresponding path program 25 times [2021-06-05 05:13:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249645614] [2021-06-05 05:13:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:10,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:10,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249645614] [2021-06-05 05:13:10,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249645614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:10,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286890451] [2021-06-05 05:13:10,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:10,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:10,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:10,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:10,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:10,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:10,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:11,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286890451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:11,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:11,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:11,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068170586] [2021-06-05 05:13:11,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:11,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:11,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:11,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:11,003 INFO L87 Difference]: Start difference. First operand 3624 states and 15194 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:11,750 INFO L93 Difference]: Finished difference Result 3826 states and 15955 transitions. [2021-06-05 05:13:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:13:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:11,758 INFO L225 Difference]: With dead ends: 3826 [2021-06-05 05:13:11,758 INFO L226 Difference]: Without dead ends: 3804 [2021-06-05 05:13:11,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2021-06-05 05:13:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3628. [2021-06-05 05:13:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193548387096774) internal successors, (15210), 3627 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15210 transitions. [2021-06-05 05:13:11,810 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15210 transitions. Word has length 23 [2021-06-05 05:13:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:11,810 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15210 transitions. [2021-06-05 05:13:11,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15210 transitions. [2021-06-05 05:13:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:11,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:11,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:12,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 05:13:12,016 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash -307582653, now seen corresponding path program 26 times [2021-06-05 05:13:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:12,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878544538] [2021-06-05 05:13:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:12,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878544538] [2021-06-05 05:13:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878544538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506836949] [2021-06-05 05:13:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:12,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:12,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:12,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:12,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506836949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:12,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:12,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125692607] [2021-06-05 05:13:12,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:12,394 INFO L87 Difference]: Start difference. First operand 3628 states and 15210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:13,158 INFO L93 Difference]: Finished difference Result 3804 states and 15876 transitions. [2021-06-05 05:13:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:13,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:13,166 INFO L225 Difference]: With dead ends: 3804 [2021-06-05 05:13:13,166 INFO L226 Difference]: Without dead ends: 3789 [2021-06-05 05:13:13,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-06-05 05:13:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 3620. [2021-06-05 05:13:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193423597678917) internal successors, (15176), 3619 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15176 transitions. [2021-06-05 05:13:13,222 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15176 transitions. Word has length 23 [2021-06-05 05:13:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15176 transitions. [2021-06-05 05:13:13,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15176 transitions. [2021-06-05 05:13:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:13,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:13,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:13,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:13,429 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1561262577, now seen corresponding path program 27 times [2021-06-05 05:13:13,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:13,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837610248] [2021-06-05 05:13:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:13,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837610248] [2021-06-05 05:13:13,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837610248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947225075] [2021-06-05 05:13:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:13,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:13,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:13,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:13,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:13,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:13,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:13,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947225075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:13,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:13,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991145960] [2021-06-05 05:13:13,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:13,778 INFO L87 Difference]: Start difference. First operand 3620 states and 15176 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:14,360 INFO L93 Difference]: Finished difference Result 3875 states and 16145 transitions. [2021-06-05 05:13:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:14,368 INFO L225 Difference]: With dead ends: 3875 [2021-06-05 05:13:14,368 INFO L226 Difference]: Without dead ends: 3860 [2021-06-05 05:13:14,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-06-05 05:13:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3624. [2021-06-05 05:13:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193762075627933) internal successors, (15194), 3623 states have internal predecessors, (15194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15194 transitions. [2021-06-05 05:13:14,418 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15194 transitions. Word has length 23 [2021-06-05 05:13:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:14,418 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15194 transitions. [2021-06-05 05:13:14,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15194 transitions. [2021-06-05 05:13:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:14,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:14,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:14,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,624 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2074789429, now seen corresponding path program 28 times [2021-06-05 05:13:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:14,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136105403] [2021-06-05 05:13:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:14,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136105403] [2021-06-05 05:13:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136105403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52382770] [2021-06-05 05:13:14,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:14,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:14,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:14,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:14,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:14,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52382770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:14,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:14,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269861005] [2021-06-05 05:13:14,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:14,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:14,966 INFO L87 Difference]: Start difference. First operand 3624 states and 15194 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:15,670 INFO L93 Difference]: Finished difference Result 3827 states and 15958 transitions. [2021-06-05 05:13:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:13:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:15,678 INFO L225 Difference]: With dead ends: 3827 [2021-06-05 05:13:15,678 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 05:13:15,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 636.7ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:13:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 05:13:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3628. [2021-06-05 05:13:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193548387096774) internal successors, (15210), 3627 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15210 transitions. [2021-06-05 05:13:15,729 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15210 transitions. Word has length 23 [2021-06-05 05:13:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:15,729 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15210 transitions. [2021-06-05 05:13:15,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15210 transitions. [2021-06-05 05:13:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:15,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:15,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:15,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:15,935 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1144466711, now seen corresponding path program 29 times [2021-06-05 05:13:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:15,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869741707] [2021-06-05 05:13:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:16,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:16,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869741707] [2021-06-05 05:13:16,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869741707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116795673] [2021-06-05 05:13:16,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:16,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:16,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:16,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:16,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:16,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:16,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:16,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:16,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116795673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:16,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:16,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564874323] [2021-06-05 05:13:16,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:16,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:16,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:16,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:16,289 INFO L87 Difference]: Start difference. First operand 3628 states and 15210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:16,880 INFO L93 Difference]: Finished difference Result 3813 states and 15904 transitions. [2021-06-05 05:13:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:16,888 INFO L225 Difference]: With dead ends: 3813 [2021-06-05 05:13:16,888 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 05:13:16,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 05:13:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3620. [2021-06-05 05:13:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193423597678917) internal successors, (15176), 3619 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15176 transitions. [2021-06-05 05:13:16,943 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15176 transitions. Word has length 23 [2021-06-05 05:13:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:16,943 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15176 transitions. [2021-06-05 05:13:16,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15176 transitions. [2021-06-05 05:13:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:16,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:16,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:17,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:17,150 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash -863470859, now seen corresponding path program 30 times [2021-06-05 05:13:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:17,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505497117] [2021-06-05 05:13:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:17,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:17,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505497117] [2021-06-05 05:13:17,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505497117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582096167] [2021-06-05 05:13:17,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:17,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:17,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:17,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:17,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:17,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:17,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:17,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:17,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582096167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:17,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540746013] [2021-06-05 05:13:17,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:17,525 INFO L87 Difference]: Start difference. First operand 3620 states and 15176 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:18,085 INFO L93 Difference]: Finished difference Result 3838 states and 16010 transitions. [2021-06-05 05:13:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:13:18,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:18,092 INFO L225 Difference]: With dead ends: 3838 [2021-06-05 05:13:18,093 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 05:13:18,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 05:13:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3629. [2021-06-05 05:13:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.191841234840132) internal successors, (15208), 3628 states have internal predecessors, (15208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15208 transitions. [2021-06-05 05:13:18,143 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15208 transitions. Word has length 23 [2021-06-05 05:13:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:18,143 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15208 transitions. [2021-06-05 05:13:18,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15208 transitions. [2021-06-05 05:13:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:18,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:18,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:18,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 05:13:18,350 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1905046927, now seen corresponding path program 31 times [2021-06-05 05:13:18,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:18,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810774727] [2021-06-05 05:13:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:18,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:18,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810774727] [2021-06-05 05:13:18,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810774727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:18,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489627064] [2021-06-05 05:13:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:18,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:18,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:18,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:18,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:18,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:18,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:18,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:18,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489627064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:18,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:18,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:18,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024396635] [2021-06-05 05:13:18,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:18,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:18,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:18,747 INFO L87 Difference]: Start difference. First operand 3629 states and 15208 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:19,354 INFO L93 Difference]: Finished difference Result 3845 states and 16033 transitions. [2021-06-05 05:13:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:19,362 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 05:13:19,362 INFO L226 Difference]: Without dead ends: 3821 [2021-06-05 05:13:19,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:13:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-06-05 05:13:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3626. [2021-06-05 05:13:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 05:13:19,448 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 05:13:19,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:19,448 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 05:13:19,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 05:13:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:19,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:19,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:19,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 05:13:19,655 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2102799017, now seen corresponding path program 32 times [2021-06-05 05:13:19,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:19,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967993006] [2021-06-05 05:13:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:19,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:19,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967993006] [2021-06-05 05:13:19,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967993006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447066862] [2021-06-05 05:13:19,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:19,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:19,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:19,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:19,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:19,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:19,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:19,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:19,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:19,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:19,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:20,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447066862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:20,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:20,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520557322] [2021-06-05 05:13:20,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:20,088 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:20,769 INFO L93 Difference]: Finished difference Result 3802 states and 15861 transitions. [2021-06-05 05:13:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:13:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:20,777 INFO L225 Difference]: With dead ends: 3802 [2021-06-05 05:13:20,778 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 05:13:20,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 05:13:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3630. [2021-06-05 05:13:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 05:13:20,831 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 05:13:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:20,832 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 05:13:20,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 05:13:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:20,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:20,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:21,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 05:13:21,038 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1609581631, now seen corresponding path program 33 times [2021-06-05 05:13:21,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:21,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307112610] [2021-06-05 05:13:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:21,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:21,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307112610] [2021-06-05 05:13:21,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307112610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:21,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428793054] [2021-06-05 05:13:21,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:21,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:21,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:21,339 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:13:21,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:13:21,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:21,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:21,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:21,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 05:13:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:21,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428793054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:21,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:21,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:13:21,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175937483] [2021-06-05 05:13:21,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:13:21,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:21,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:13:21,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:13:21,487 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:22,399 INFO L93 Difference]: Finished difference Result 3922 states and 16351 transitions. [2021-06-05 05:13:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:13:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:22,407 INFO L225 Difference]: With dead ends: 3922 [2021-06-05 05:13:22,407 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 05:13:22,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 843.3ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:13:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 05:13:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3626. [2021-06-05 05:13:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 05:13:22,456 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 05:13:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 05:13:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 05:13:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:22,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:22,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:22,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:22,662 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1750609409, now seen corresponding path program 34 times [2021-06-05 05:13:22,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:22,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72590689] [2021-06-05 05:13:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:22,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:22,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72590689] [2021-06-05 05:13:22,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72590689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:22,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731557178] [2021-06-05 05:13:22,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:22,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:22,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:22,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:22,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:22,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:22,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:23,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731557178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:23,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:23,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131780482] [2021-06-05 05:13:23,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:23,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:23,077 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:23,744 INFO L93 Difference]: Finished difference Result 3788 states and 15802 transitions. [2021-06-05 05:13:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:23,752 INFO L225 Difference]: With dead ends: 3788 [2021-06-05 05:13:23,752 INFO L226 Difference]: Without dead ends: 3767 [2021-06-05 05:13:23,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-05 05:13:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3630. [2021-06-05 05:13:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 05:13:23,802 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 05:13:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:23,802 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 05:13:23,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 05:13:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:23,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:23,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:24,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:24,007 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1531665355, now seen corresponding path program 35 times [2021-06-05 05:13:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:24,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133243392] [2021-06-05 05:13:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:24,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133243392] [2021-06-05 05:13:24,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133243392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154597601] [2021-06-05 05:13:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:24,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:24,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:24,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:24,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:24,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:24,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:24,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154597601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:24,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315628373] [2021-06-05 05:13:24,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:24,389 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:24,914 INFO L93 Difference]: Finished difference Result 3777 states and 15760 transitions. [2021-06-05 05:13:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:13:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:24,922 INFO L225 Difference]: With dead ends: 3777 [2021-06-05 05:13:24,922 INFO L226 Difference]: Without dead ends: 3762 [2021-06-05 05:13:24,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-06-05 05:13:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3626. [2021-06-05 05:13:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 05:13:24,976 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 05:13:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:24,976 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 05:13:24,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 05:13:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:24,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:24,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:25,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 05:13:25,183 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 515550249, now seen corresponding path program 36 times [2021-06-05 05:13:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:25,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588007824] [2021-06-05 05:13:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:25,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:25,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588007824] [2021-06-05 05:13:25,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588007824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:25,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538452516] [2021-06-05 05:13:25,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:25,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:25,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:25,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:25,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:25,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:25,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:25,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:25,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:25,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:25,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538452516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:25,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:25,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:25,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007267060] [2021-06-05 05:13:25,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:25,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:25,529 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:26,083 INFO L93 Difference]: Finished difference Result 3851 states and 16056 transitions. [2021-06-05 05:13:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:26,091 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 05:13:26,091 INFO L226 Difference]: Without dead ends: 3836 [2021-06-05 05:13:26,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2021-06-05 05:13:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3634. [2021-06-05 05:13:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193228736581338) internal successors, (15234), 3633 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15234 transitions. [2021-06-05 05:13:26,136 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15234 transitions. Word has length 23 [2021-06-05 05:13:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:26,136 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15234 transitions. [2021-06-05 05:13:26,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15234 transitions. [2021-06-05 05:13:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:26,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:26,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:26,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 05:13:26,342 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:26,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1100884201, now seen corresponding path program 37 times [2021-06-05 05:13:26,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:26,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108976458] [2021-06-05 05:13:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:26,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108976458] [2021-06-05 05:13:26,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108976458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868101623] [2021-06-05 05:13:26,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:26,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:26,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:26,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:26,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:26,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:26,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868101623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:26,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:26,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773293251] [2021-06-05 05:13:26,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:26,718 INFO L87 Difference]: Start difference. First operand 3634 states and 15234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:27,585 INFO L93 Difference]: Finished difference Result 3824 states and 15947 transitions. [2021-06-05 05:13:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:13:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:27,593 INFO L225 Difference]: With dead ends: 3824 [2021-06-05 05:13:27,593 INFO L226 Difference]: Without dead ends: 3802 [2021-06-05 05:13:27,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-05 05:13:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3638. [2021-06-05 05:13:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 05:13:27,650 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 05:13:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:27,650 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 05:13:27,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 05:13:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:27,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:27,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:27,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 05:13:27,857 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1580516361, now seen corresponding path program 38 times [2021-06-05 05:13:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:27,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893891783] [2021-06-05 05:13:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:27,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:27,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893891783] [2021-06-05 05:13:27,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893891783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:27,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051332422] [2021-06-05 05:13:27,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:28,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:28,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:28,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:28,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:28,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:28,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:28,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:28,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:28,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051332422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:28,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:28,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:28,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356558544] [2021-06-05 05:13:28,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:28,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:28,218 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,482 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 05:13:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:28,930 INFO L93 Difference]: Finished difference Result 3789 states and 15816 transitions. [2021-06-05 05:13:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:28,938 INFO L225 Difference]: With dead ends: 3789 [2021-06-05 05:13:28,938 INFO L226 Difference]: Without dead ends: 3774 [2021-06-05 05:13:28,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-05 05:13:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3630. [2021-06-05 05:13:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 05:13:28,991 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 05:13:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:28,991 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 05:13:28,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 05:13:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:28,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:28,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:29,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 05:13:29,197 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1019955137, now seen corresponding path program 39 times [2021-06-05 05:13:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:29,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982303115] [2021-06-05 05:13:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:29,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:29,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982303115] [2021-06-05 05:13:29,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982303115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:29,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006686655] [2021-06-05 05:13:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:29,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:29,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:29,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:29,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:29,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:29,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:29,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:29,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:29,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006686655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:29,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:29,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321917599] [2021-06-05 05:13:29,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:29,574 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:30,177 INFO L93 Difference]: Finished difference Result 3822 states and 15936 transitions. [2021-06-05 05:13:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:30,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:30,184 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 05:13:30,184 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 05:13:30,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 05:13:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 3626. [2021-06-05 05:13:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 05:13:30,231 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 05:13:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:30,231 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 05:13:30,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 05:13:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:30,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:30,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:30,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 05:13:30,436 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash -348137985, now seen corresponding path program 40 times [2021-06-05 05:13:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237867816] [2021-06-05 05:13:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:30,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:30,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237867816] [2021-06-05 05:13:30,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237867816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:30,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345777053] [2021-06-05 05:13:30,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:30,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:30,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:30,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:30,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:30,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:30,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:30,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345777053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:30,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:30,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:30,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567029454] [2021-06-05 05:13:30,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:30,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:30,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:30,809 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:31,478 INFO L93 Difference]: Finished difference Result 3863 states and 16096 transitions. [2021-06-05 05:13:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:31,486 INFO L225 Difference]: With dead ends: 3863 [2021-06-05 05:13:31,486 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 05:13:31,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 05:13:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3634. [2021-06-05 05:13:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193228736581338) internal successors, (15234), 3633 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15234 transitions. [2021-06-05 05:13:31,541 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15234 transitions. Word has length 23 [2021-06-05 05:13:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:31,541 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15234 transitions. [2021-06-05 05:13:31,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15234 transitions. [2021-06-05 05:13:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:31,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:31,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:31,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 05:13:31,748 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash 165388867, now seen corresponding path program 41 times [2021-06-05 05:13:31,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:31,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234248897] [2021-06-05 05:13:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:31,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:31,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234248897] [2021-06-05 05:13:31,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234248897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:31,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077822166] [2021-06-05 05:13:31,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:31,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:31,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:31,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:31,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:31,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:32,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:32,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:32,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077822166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:32,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:32,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:32,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590581398] [2021-06-05 05:13:32,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:32,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:32,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:32,092 INFO L87 Difference]: Start difference. First operand 3634 states and 15234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:32,890 INFO L93 Difference]: Finished difference Result 3822 states and 15936 transitions. [2021-06-05 05:13:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:13:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:32,898 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 05:13:32,898 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 05:13:32,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 05:13:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3638. [2021-06-05 05:13:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 05:13:32,947 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 05:13:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:32,947 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 05:13:32,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 05:13:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:32,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:32,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:33,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 05:13:33,153 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1241100023, now seen corresponding path program 42 times [2021-06-05 05:13:33,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:33,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215474027] [2021-06-05 05:13:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:33,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:33,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215474027] [2021-06-05 05:13:33,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215474027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:33,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210931324] [2021-06-05 05:13:33,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:33,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:33,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:33,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:33,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:33,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:33,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:33,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:33,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210931324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:33,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951377375] [2021-06-05 05:13:33,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:33,559 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:34,137 INFO L93 Difference]: Finished difference Result 3803 states and 15863 transitions. [2021-06-05 05:13:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:34,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:34,144 INFO L225 Difference]: With dead ends: 3803 [2021-06-05 05:13:34,145 INFO L226 Difference]: Without dead ends: 3788 [2021-06-05 05:13:34,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-05 05:13:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3630. [2021-06-05 05:13:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 05:13:34,193 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 05:13:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 05:13:34,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 05:13:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:34,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:34,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:34,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:34,401 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1411914955, now seen corresponding path program 43 times [2021-06-05 05:13:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:34,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958774954] [2021-06-05 05:13:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:34,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:34,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958774954] [2021-06-05 05:13:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958774954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128584890] [2021-06-05 05:13:34,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:34,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:34,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:34,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128584890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:34,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:34,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177234201] [2021-06-05 05:13:34,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:34,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:34,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:34,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:34,763 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:35,280 INFO L93 Difference]: Finished difference Result 3812 states and 15896 transitions. [2021-06-05 05:13:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:35,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:35,288 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 05:13:35,288 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 05:13:35,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 05:13:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3626. [2021-06-05 05:13:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 05:13:35,341 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 05:13:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:35,341 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 05:13:35,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 05:13:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:35,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:35,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:35,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:13:35,547 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:35,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1665661203, now seen corresponding path program 44 times [2021-06-05 05:13:35,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:35,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815905067] [2021-06-05 05:13:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:35,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:35,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815905067] [2021-06-05 05:13:35,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815905067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:35,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143372690] [2021-06-05 05:13:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:35,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:35,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:35,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:35,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:35,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:35,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 05:13:35,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:35,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:35,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:13:35,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 05:13:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:35,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143372690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:35,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:35,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:13:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167687690] [2021-06-05 05:13:35,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:13:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:13:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:35,943 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:36,715 INFO L93 Difference]: Finished difference Result 4271 states and 17731 transitions. [2021-06-05 05:13:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:13:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:36,724 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 05:13:36,725 INFO L226 Difference]: Without dead ends: 4249 [2021-06-05 05:13:36,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-06-05 05:13:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 3638. [2021-06-05 05:13:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.1946659334616445) internal successors, (15256), 3637 states have internal predecessors, (15256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15256 transitions. [2021-06-05 05:13:36,779 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15256 transitions. Word has length 23 [2021-06-05 05:13:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:36,779 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15256 transitions. [2021-06-05 05:13:36,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15256 transitions. [2021-06-05 05:13:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:36,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:36,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 05:13:36,985 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2043972141, now seen corresponding path program 45 times [2021-06-05 05:13:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398365295] [2021-06-05 05:13:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:37,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:37,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398365295] [2021-06-05 05:13:37,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398365295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128699580] [2021-06-05 05:13:37,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:37,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:37,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:37,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:37,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:37,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 05:13:37,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:37,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:37,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:37,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 05:13:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128699580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:37,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:13:37,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149428349] [2021-06-05 05:13:37,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:13:37,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:13:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:37,405 INFO L87 Difference]: Start difference. First operand 3638 states and 15256 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:38,095 INFO L93 Difference]: Finished difference Result 4093 states and 17016 transitions. [2021-06-05 05:13:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:38,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:38,103 INFO L225 Difference]: With dead ends: 4093 [2021-06-05 05:13:38,103 INFO L226 Difference]: Without dead ends: 4067 [2021-06-05 05:13:38,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:13:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-06-05 05:13:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3642. [2021-06-05 05:13:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.194452073606152) internal successors, (15272), 3641 states have internal predecessors, (15272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15272 transitions. [2021-06-05 05:13:38,154 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15272 transitions. Word has length 23 [2021-06-05 05:13:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:38,154 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15272 transitions. [2021-06-05 05:13:38,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15272 transitions. [2021-06-05 05:13:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:38,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:38,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:38,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 05:13:38,360 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -430405407, now seen corresponding path program 46 times [2021-06-05 05:13:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:38,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331410358] [2021-06-05 05:13:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:38,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:38,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331410358] [2021-06-05 05:13:38,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331410358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:38,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993666031] [2021-06-05 05:13:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:38,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:38,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:38,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:38,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:38,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:38,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:38,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:38,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993666031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:38,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:38,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:38,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388109892] [2021-06-05 05:13:38,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:38,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:38,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:38,729 INFO L87 Difference]: Start difference. First operand 3642 states and 15272 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,998 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-05 05:13:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:39,662 INFO L93 Difference]: Finished difference Result 4158 states and 17272 transitions. [2021-06-05 05:13:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:13:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:39,671 INFO L225 Difference]: With dead ends: 4158 [2021-06-05 05:13:39,672 INFO L226 Difference]: Without dead ends: 4137 [2021-06-05 05:13:39,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:13:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2021-06-05 05:13:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 3634. [2021-06-05 05:13:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.1943297550233964) internal successors, (15238), 3633 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15238 transitions. [2021-06-05 05:13:39,729 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15238 transitions. Word has length 23 [2021-06-05 05:13:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:39,730 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15238 transitions. [2021-06-05 05:13:39,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15238 transitions. [2021-06-05 05:13:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:39,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:39,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:39,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 05:13:39,936 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2015158581, now seen corresponding path program 47 times [2021-06-05 05:13:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:39,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680563765] [2021-06-05 05:13:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:40,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:40,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680563765] [2021-06-05 05:13:40,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680563765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:40,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703283329] [2021-06-05 05:13:40,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:40,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:40,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:40,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:40,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:40,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:40,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:40,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703283329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:40,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412257822] [2021-06-05 05:13:40,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:40,310 INFO L87 Difference]: Start difference. First operand 3634 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:41,259 INFO L93 Difference]: Finished difference Result 4302 states and 17834 transitions. [2021-06-05 05:13:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:13:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:41,268 INFO L225 Difference]: With dead ends: 4302 [2021-06-05 05:13:41,268 INFO L226 Difference]: Without dead ends: 4267 [2021-06-05 05:13:41,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 719.4ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:13:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2021-06-05 05:13:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 3642. [2021-06-05 05:13:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.194452073606152) internal successors, (15272), 3641 states have internal predecessors, (15272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15272 transitions. [2021-06-05 05:13:41,327 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15272 transitions. Word has length 23 [2021-06-05 05:13:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:41,327 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15272 transitions. [2021-06-05 05:13:41,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15272 transitions. [2021-06-05 05:13:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:41,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:41,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:41,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 05:13:41,533 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2096557637, now seen corresponding path program 48 times [2021-06-05 05:13:41,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:41,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966069818] [2021-06-05 05:13:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:41,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966069818] [2021-06-05 05:13:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966069818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457997310] [2021-06-05 05:13:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:41,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:41,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:41,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:41,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:41,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:41,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:41,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:41,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457997310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:41,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:41,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:41,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218944609] [2021-06-05 05:13:41,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:41,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:41,895 INFO L87 Difference]: Start difference. First operand 3642 states and 15272 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:42,824 INFO L93 Difference]: Finished difference Result 4116 states and 17103 transitions. [2021-06-05 05:13:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:13:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:42,831 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 05:13:42,832 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 05:13:42,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:13:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 05:13:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3646. [2021-06-05 05:13:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 4.194238683127572) internal successors, (15288), 3645 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 15288 transitions. [2021-06-05 05:13:42,880 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 15288 transitions. Word has length 23 [2021-06-05 05:13:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:42,880 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 15288 transitions. [2021-06-05 05:13:42,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 15288 transitions. [2021-06-05 05:13:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:42,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:42,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:43,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:43,086 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash -584842925, now seen corresponding path program 49 times [2021-06-05 05:13:43,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:43,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689942966] [2021-06-05 05:13:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:43,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:43,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689942966] [2021-06-05 05:13:43,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689942966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652844505] [2021-06-05 05:13:43,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:43,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:43,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:43,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:43,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:43,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652844505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260103955] [2021-06-05 05:13:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:43,482 INFO L87 Difference]: Start difference. First operand 3646 states and 15288 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:44,378 INFO L93 Difference]: Finished difference Result 4175 states and 17331 transitions. [2021-06-05 05:13:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:44,386 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 05:13:44,386 INFO L226 Difference]: Without dead ends: 4154 [2021-06-05 05:13:44,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-06-05 05:13:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3626. [2021-06-05 05:13:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 05:13:44,436 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 05:13:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:44,436 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 05:13:44,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 05:13:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:44,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:44,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:44,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:44,642 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:44,642 INFO L82 PathProgramCache]: Analyzing trace with hash -448592937, now seen corresponding path program 50 times [2021-06-05 05:13:44,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:44,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208319931] [2021-06-05 05:13:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:44,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:44,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208319931] [2021-06-05 05:13:44,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208319931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:44,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202901325] [2021-06-05 05:13:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:44,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:44,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:44,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:44,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:44,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:44,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:44,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:44,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:45,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202901325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:45,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:45,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:45,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108021622] [2021-06-05 05:13:45,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:45,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:45,015 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:45,723 INFO L93 Difference]: Finished difference Result 4118 states and 17119 transitions. [2021-06-05 05:13:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:45,732 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 05:13:45,732 INFO L226 Difference]: Without dead ends: 4096 [2021-06-05 05:13:45,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:13:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2021-06-05 05:13:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 3634. [2021-06-05 05:13:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193503991191853) internal successors, (15235), 3633 states have internal predecessors, (15235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15235 transitions. [2021-06-05 05:13:45,807 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15235 transitions. Word has length 23 [2021-06-05 05:13:45,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:45,807 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15235 transitions. [2021-06-05 05:13:45,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15235 transitions. [2021-06-05 05:13:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:45,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:45,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:46,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 05:13:46,013 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash 136741015, now seen corresponding path program 51 times [2021-06-05 05:13:46,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:46,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908396397] [2021-06-05 05:13:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:46,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:46,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908396397] [2021-06-05 05:13:46,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908396397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:46,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192272752] [2021-06-05 05:13:46,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:46,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:46,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:46,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:46,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:46,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:46,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:46,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:46,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:46,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192272752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:46,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:46,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209699492] [2021-06-05 05:13:46,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:46,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:46,415 INFO L87 Difference]: Start difference. First operand 3634 states and 15235 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:47,241 INFO L93 Difference]: Finished difference Result 3996 states and 16631 transitions. [2021-06-05 05:13:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:47,251 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 05:13:47,251 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 05:13:47,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 791.6ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:13:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 05:13:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3638. [2021-06-05 05:13:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 05:13:47,309 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 05:13:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:47,309 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 05:13:47,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 05:13:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:47,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:47,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:47,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 05:13:47,516 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:47,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1750307749, now seen corresponding path program 52 times [2021-06-05 05:13:47,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:47,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845597283] [2021-06-05 05:13:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:47,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845597283] [2021-06-05 05:13:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845597283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913472132] [2021-06-05 05:13:47,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:47,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:47,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:47,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:47,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:47,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:47,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:47,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:47,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913472132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:47,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:47,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:47,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871386606] [2021-06-05 05:13:47,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:47,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:47,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:47,894 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:48,736 INFO L93 Difference]: Finished difference Result 4014 states and 16703 transitions. [2021-06-05 05:13:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:13:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:48,744 INFO L225 Difference]: With dead ends: 4014 [2021-06-05 05:13:48,745 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 05:13:48,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 767.6ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 05:13:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3630. [2021-06-05 05:13:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.193166161476991) internal successors, (15217), 3629 states have internal predecessors, (15217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15217 transitions. [2021-06-05 05:13:48,794 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15217 transitions. Word has length 23 [2021-06-05 05:13:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:48,794 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15217 transitions. [2021-06-05 05:13:48,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15217 transitions. [2021-06-05 05:13:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:48,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:48,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:48,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:49,000 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash -675814317, now seen corresponding path program 53 times [2021-06-05 05:13:49,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:49,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902777914] [2021-06-05 05:13:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:49,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:49,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902777914] [2021-06-05 05:13:49,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902777914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:49,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571590774] [2021-06-05 05:13:49,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:49,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:49,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:49,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:49,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:49,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:49,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:49,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:49,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:13:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:49,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571590774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:49,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:49,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:49,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493958126] [2021-06-05 05:13:49,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:49,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:49,388 INFO L87 Difference]: Start difference. First operand 3630 states and 15217 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:49,972 INFO L93 Difference]: Finished difference Result 3988 states and 16595 transitions. [2021-06-05 05:13:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:49,980 INFO L225 Difference]: With dead ends: 3988 [2021-06-05 05:13:49,980 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 05:13:49,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 05:13:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3636. [2021-06-05 05:13:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 4.193672627235213) internal successors, (15244), 3635 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 15244 transitions. [2021-06-05 05:13:50,032 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 15244 transitions. Word has length 23 [2021-06-05 05:13:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:50,032 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 15244 transitions. [2021-06-05 05:13:50,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 15244 transitions. [2021-06-05 05:13:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:50,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:50,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:50,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 05:13:50,238 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash -162287465, now seen corresponding path program 54 times [2021-06-05 05:13:50,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:50,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547238819] [2021-06-05 05:13:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:50,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:50,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547238819] [2021-06-05 05:13:50,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547238819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:50,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560819728] [2021-06-05 05:13:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:50,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:13:50,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:50,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:50,561 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 05:13:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 68 [2021-06-05 05:13:50,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:50,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:50,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:50,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 05:13:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:50,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560819728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:50,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:50,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:13:50,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710471693] [2021-06-05 05:13:50,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:13:50,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:13:50,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:13:50,695 INFO L87 Difference]: Start difference. First operand 3636 states and 15244 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:51,473 INFO L93 Difference]: Finished difference Result 3940 states and 16403 transitions. [2021-06-05 05:13:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:13:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:51,481 INFO L225 Difference]: With dead ends: 3940 [2021-06-05 05:13:51,481 INFO L226 Difference]: Without dead ends: 3915 [2021-06-05 05:13:51,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:13:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2021-06-05 05:13:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3640. [2021-06-05 05:13:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193459741687277) internal successors, (15260), 3639 states have internal predecessors, (15260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15260 transitions. [2021-06-05 05:13:51,534 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15260 transitions. Word has length 23 [2021-06-05 05:13:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:51,534 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15260 transitions. [2021-06-05 05:13:51,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15260 transitions. [2021-06-05 05:13:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:51,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:51,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:51,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:51,740 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:51,740 INFO L82 PathProgramCache]: Analyzing trace with hash 913423691, now seen corresponding path program 55 times [2021-06-05 05:13:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:51,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38326969] [2021-06-05 05:13:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:51,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:51,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38326969] [2021-06-05 05:13:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38326969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236603189] [2021-06-05 05:13:51,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:51,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:51,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:51,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:52,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:52,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:52,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:13:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:52,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236603189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:52,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:52,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:52,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317762007] [2021-06-05 05:13:52,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:52,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:52,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:52,099 INFO L87 Difference]: Start difference. First operand 3640 states and 15260 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:52,735 INFO L93 Difference]: Finished difference Result 3936 states and 16385 transitions. [2021-06-05 05:13:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:13:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:52,743 INFO L225 Difference]: With dead ends: 3936 [2021-06-05 05:13:52,743 INFO L226 Difference]: Without dead ends: 3915 [2021-06-05 05:13:52,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2021-06-05 05:13:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3632. [2021-06-05 05:13:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 4.193335169374828) internal successors, (15226), 3631 states have internal predecessors, (15226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 15226 transitions. [2021-06-05 05:13:52,793 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 15226 transitions. Word has length 23 [2021-06-05 05:13:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:52,793 INFO L482 AbstractCegarLoop]: Abstraction has 3632 states and 15226 transitions. [2021-06-05 05:13:52,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 15226 transitions. [2021-06-05 05:13:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:52,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:52,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:52,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 05:13:52,999 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1194419543, now seen corresponding path program 56 times [2021-06-05 05:13:52,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:52,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997907304] [2021-06-05 05:13:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:53,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997907304] [2021-06-05 05:13:53,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997907304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463864525] [2021-06-05 05:13:53,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:53,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:53,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:53,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:53,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:53,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:53,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:53,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:53,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463864525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:53,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:53,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:53,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030226321] [2021-06-05 05:13:53,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:53,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:53,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:53,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:53,386 INFO L87 Difference]: Start difference. First operand 3632 states and 15226 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:54,008 INFO L93 Difference]: Finished difference Result 3969 states and 16526 transitions. [2021-06-05 05:13:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:54,016 INFO L225 Difference]: With dead ends: 3969 [2021-06-05 05:13:54,016 INFO L226 Difference]: Without dead ends: 3943 [2021-06-05 05:13:54,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-06-05 05:13:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3641. [2021-06-05 05:13:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 4.191758241758242) internal successors, (15258), 3640 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 15258 transitions. [2021-06-05 05:13:54,064 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 15258 transitions. Word has length 23 [2021-06-05 05:13:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:54,064 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 15258 transitions. [2021-06-05 05:13:54,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 15258 transitions. [2021-06-05 05:13:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:54,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:54,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:54,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 05:13:54,270 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:54,270 INFO L82 PathProgramCache]: Analyzing trace with hash 152843475, now seen corresponding path program 57 times [2021-06-05 05:13:54,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:54,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792820434] [2021-06-05 05:13:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:54,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:54,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792820434] [2021-06-05 05:13:54,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792820434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:54,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93319898] [2021-06-05 05:13:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:54,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:54,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:54,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:54,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:54,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:54,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:54,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:54,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93319898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:54,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:54,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:54,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266753652] [2021-06-05 05:13:54,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:54,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:54,668 INFO L87 Difference]: Start difference. First operand 3641 states and 15258 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:55,390 INFO L93 Difference]: Finished difference Result 3976 states and 16549 transitions. [2021-06-05 05:13:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:55,398 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 05:13:55,398 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 05:13:55,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:13:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 05:13:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3638. [2021-06-05 05:13:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 05:13:55,450 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 05:13:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:55,450 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 05:13:55,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 05:13:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:55,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:55,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:55,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 05:13:55,656 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:55,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:55,656 INFO L82 PathProgramCache]: Analyzing trace with hash -134277877, now seen corresponding path program 58 times [2021-06-05 05:13:55,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:55,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337959312] [2021-06-05 05:13:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:55,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:55,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337959312] [2021-06-05 05:13:55,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337959312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:55,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791860527] [2021-06-05 05:13:55,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:55,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:55,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:55,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:55,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:55,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:55,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:55,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:55,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:55,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:56,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791860527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:56,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:56,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136477277] [2021-06-05 05:13:56,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:56,070 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:56,648 INFO L93 Difference]: Finished difference Result 3893 states and 16217 transitions. [2021-06-05 05:13:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:56,657 INFO L225 Difference]: With dead ends: 3893 [2021-06-05 05:13:56,657 INFO L226 Difference]: Without dead ends: 3867 [2021-06-05 05:13:56,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:13:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-05 05:13:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3642. [2021-06-05 05:13:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.192804174677287) internal successors, (15266), 3641 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15266 transitions. [2021-06-05 05:13:56,710 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15266 transitions. Word has length 23 [2021-06-05 05:13:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:56,710 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15266 transitions. [2021-06-05 05:13:56,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15266 transitions. [2021-06-05 05:13:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:56,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:56,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:56,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:56,916 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash -627495263, now seen corresponding path program 59 times [2021-06-05 05:13:56,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:56,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845172212] [2021-06-05 05:13:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:57,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845172212] [2021-06-05 05:13:57,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845172212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200011514] [2021-06-05 05:13:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:57,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:57,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:57,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:57,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:57,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:57,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:57,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:57,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200011514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:57,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:57,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:57,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141580456] [2021-06-05 05:13:57,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:57,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:57,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:57,316 INFO L87 Difference]: Start difference. First operand 3642 states and 15266 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:57,959 INFO L93 Difference]: Finished difference Result 3906 states and 16269 transitions. [2021-06-05 05:13:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:57,967 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 05:13:57,967 INFO L226 Difference]: Without dead ends: 3885 [2021-06-05 05:13:57,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-06-05 05:13:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3638. [2021-06-05 05:13:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 05:13:58,020 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 05:13:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:58,020 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 05:13:58,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 05:13:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:58,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:58,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:58,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:58,226 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash 307280993, now seen corresponding path program 60 times [2021-06-05 05:13:58,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:58,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456556978] [2021-06-05 05:13:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:58,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:58,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456556978] [2021-06-05 05:13:58,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456556978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218397207] [2021-06-05 05:13:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:58,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:58,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:58,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:58,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:58,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218397207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:58,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:58,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:58,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456794248] [2021-06-05 05:13:58,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:58,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:58,631 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:59,272 INFO L93 Difference]: Finished difference Result 3896 states and 16227 transitions. [2021-06-05 05:13:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:59,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:13:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:59,280 INFO L225 Difference]: With dead ends: 3896 [2021-06-05 05:13:59,280 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 05:13:59,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:13:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 05:13:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3642. [2021-06-05 05:13:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.192804174677287) internal successors, (15266), 3641 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15266 transitions. [2021-06-05 05:13:59,335 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15266 transitions. Word has length 23 [2021-06-05 05:13:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:59,335 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15266 transitions. [2021-06-05 05:13:59,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15266 transitions. [2021-06-05 05:13:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:13:59,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:59,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:59,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:59,541 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:59,542 INFO L82 PathProgramCache]: Analyzing trace with hash -705411539, now seen corresponding path program 61 times [2021-06-05 05:13:59,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:59,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492830244] [2021-06-05 05:13:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:59,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:59,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492830244] [2021-06-05 05:13:59,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492830244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:59,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569182534] [2021-06-05 05:13:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:59,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:59,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:59,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:13:59,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:59,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:59,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:59,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:13:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:59,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569182534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:59,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:59,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:13:59,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132535600] [2021-06-05 05:13:59,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:59,920 INFO L87 Difference]: Start difference. First operand 3642 states and 15266 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:00,410 INFO L93 Difference]: Finished difference Result 3910 states and 16281 transitions. [2021-06-05 05:14:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:14:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:00,418 INFO L225 Difference]: With dead ends: 3910 [2021-06-05 05:14:00,418 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 05:14:00,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 05:14:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3638. [2021-06-05 05:14:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 05:14:00,467 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 05:14:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:00,467 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 05:14:00,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 05:14:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:00,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:00,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:00,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 05:14:00,673 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash 443454581, now seen corresponding path program 62 times [2021-06-05 05:14:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:00,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969651133] [2021-06-05 05:14:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:00,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:00,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969651133] [2021-06-05 05:14:00,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969651133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57496064] [2021-06-05 05:14:00,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:00,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:00,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:00,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:00,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:00,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:00,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:01,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57496064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:01,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720200536] [2021-06-05 05:14:01,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:01,053 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:01,628 INFO L93 Difference]: Finished difference Result 4062 states and 16894 transitions. [2021-06-05 05:14:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:14:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:01,636 INFO L225 Difference]: With dead ends: 4062 [2021-06-05 05:14:01,636 INFO L226 Difference]: Without dead ends: 4027 [2021-06-05 05:14:01,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2021-06-05 05:14:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 3638. [2021-06-05 05:14:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.19191641462744) internal successors, (15246), 3637 states have internal predecessors, (15246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15246 transitions. [2021-06-05 05:14:01,690 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15246 transitions. Word has length 23 [2021-06-05 05:14:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:01,690 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15246 transitions. [2021-06-05 05:14:01,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15246 transitions. [2021-06-05 05:14:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:01,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:01,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:01,896 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2106228679, now seen corresponding path program 63 times [2021-06-05 05:14:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35485639] [2021-06-05 05:14:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:02,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35485639] [2021-06-05 05:14:02,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35485639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101803035] [2021-06-05 05:14:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:02,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:02,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:02,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:02,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:02,221 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:14:02,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:14:02,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:02,248 INFO L628 ElimStorePlain]: treesize reduction 53, result has 24.3 percent of original size [2021-06-05 05:14:02,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:02,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 05:14:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:02,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101803035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:02,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:02,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:14:02,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071049244] [2021-06-05 05:14:02,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:14:02,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:14:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:14:02,315 INFO L87 Difference]: Start difference. First operand 3638 states and 15246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:03,024 INFO L93 Difference]: Finished difference Result 4000 states and 16643 transitions. [2021-06-05 05:14:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:14:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:03,033 INFO L225 Difference]: With dead ends: 4000 [2021-06-05 05:14:03,033 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 05:14:03,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 05:14:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3645. [2021-06-05 05:14:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.190450054884742) internal successors, (15270), 3644 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15270 transitions. [2021-06-05 05:14:03,090 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15270 transitions. Word has length 23 [2021-06-05 05:14:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:03,090 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15270 transitions. [2021-06-05 05:14:03,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15270 transitions. [2021-06-05 05:14:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:03,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:03,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:03,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 05:14:03,296 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1147162549, now seen corresponding path program 64 times [2021-06-05 05:14:03,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:03,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014180266] [2021-06-05 05:14:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:03,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014180266] [2021-06-05 05:14:03,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014180266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763356896] [2021-06-05 05:14:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:03,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:03,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:03,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:03,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:03,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:03,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:03,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:03,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:03,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:14:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:03,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763356896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:03,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:03,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:03,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131237268] [2021-06-05 05:14:03,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:03,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:03,666 INFO L87 Difference]: Start difference. First operand 3645 states and 15270 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:04,277 INFO L93 Difference]: Finished difference Result 4011 states and 16687 transitions. [2021-06-05 05:14:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:14:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:04,284 INFO L225 Difference]: With dead ends: 4011 [2021-06-05 05:14:04,285 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 05:14:04,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 573.1ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:14:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 05:14:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3638. [2021-06-05 05:14:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 05:14:04,333 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 05:14:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:04,333 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 05:14:04,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 05:14:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:04,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:04,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:04,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:04,539 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2091459775, now seen corresponding path program 65 times [2021-06-05 05:14:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:04,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776871338] [2021-06-05 05:14:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:04,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:04,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776871338] [2021-06-05 05:14:04,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776871338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:04,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355906101] [2021-06-05 05:14:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:04,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:04,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:04,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:04,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:04,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:04,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:04,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:04,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355906101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:04,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:04,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899506082] [2021-06-05 05:14:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:04,992 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:05,682 INFO L93 Difference]: Finished difference Result 4211 states and 17480 transitions. [2021-06-05 05:14:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:14:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:05,691 INFO L225 Difference]: With dead ends: 4211 [2021-06-05 05:14:05,691 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 05:14:05,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:14:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 05:14:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3646. [2021-06-05 05:14:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 4.193415637860082) internal successors, (15285), 3645 states have internal predecessors, (15285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 15285 transitions. [2021-06-05 05:14:05,746 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 15285 transitions. Word has length 23 [2021-06-05 05:14:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:05,746 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 15285 transitions. [2021-06-05 05:14:05,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 15285 transitions. [2021-06-05 05:14:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:05,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:05,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:05,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 05:14:05,952 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1399108297, now seen corresponding path program 66 times [2021-06-05 05:14:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610683882] [2021-06-05 05:14:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:06,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:06,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610683882] [2021-06-05 05:14:06,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610683882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:06,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496078067] [2021-06-05 05:14:06,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:06,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:06,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:06,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:06,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:06,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:06,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:06,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:06,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:06,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496078067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:06,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:06,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:06,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989534229] [2021-06-05 05:14:06,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:06,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:06,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:06,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:06,328 INFO L87 Difference]: Start difference. First operand 3646 states and 15285 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:07,131 INFO L93 Difference]: Finished difference Result 4064 states and 16897 transitions. [2021-06-05 05:14:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:07,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:07,139 INFO L225 Difference]: With dead ends: 4064 [2021-06-05 05:14:07,139 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 05:14:07,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 05:14:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3650. [2021-06-05 05:14:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 3649 states have (on average 4.1932036174294325) internal successors, (15301), 3649 states have internal predecessors, (15301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 15301 transitions. [2021-06-05 05:14:07,195 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 15301 transitions. Word has length 23 [2021-06-05 05:14:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:07,195 INFO L482 AbstractCegarLoop]: Abstraction has 3650 states and 15301 transitions. [2021-06-05 05:14:07,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 15301 transitions. [2021-06-05 05:14:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:07,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:07,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:07,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 05:14:07,401 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1282292265, now seen corresponding path program 67 times [2021-06-05 05:14:07,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:07,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255185927] [2021-06-05 05:14:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:07,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:07,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255185927] [2021-06-05 05:14:07,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255185927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:07,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59533957] [2021-06-05 05:14:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:07,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:07,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:07,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:07,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:07,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:07,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59533957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:07,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:07,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:07,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276490929] [2021-06-05 05:14:07,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:07,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:07,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:07,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:07,805 INFO L87 Difference]: Start difference. First operand 3650 states and 15301 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:08,660 INFO L93 Difference]: Finished difference Result 4120 states and 17113 transitions. [2021-06-05 05:14:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:14:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:08,669 INFO L225 Difference]: With dead ends: 4120 [2021-06-05 05:14:08,669 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 05:14:08,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 766.5ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:14:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 05:14:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3638. [2021-06-05 05:14:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 05:14:08,726 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 05:14:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:08,727 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 05:14:08,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 05:14:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:08,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:08,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:08,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:08,933 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:08,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1191147191, now seen corresponding path program 68 times [2021-06-05 05:14:08,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:08,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977535802] [2021-06-05 05:14:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:09,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:09,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977535802] [2021-06-05 05:14:09,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977535802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449816017] [2021-06-05 05:14:09,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:09,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:09,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:09,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:09,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:09,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:09,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:09,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:09,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:09,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449816017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:09,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:09,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659909998] [2021-06-05 05:14:09,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:09,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:09,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:09,319 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:09,917 INFO L93 Difference]: Finished difference Result 3976 states and 16555 transitions. [2021-06-05 05:14:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:09,925 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 05:14:09,925 INFO L226 Difference]: Without dead ends: 3950 [2021-06-05 05:14:09,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-06-05 05:14:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3647. [2021-06-05 05:14:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 4.191716950082282) internal successors, (15283), 3646 states have internal predecessors, (15283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 15283 transitions. [2021-06-05 05:14:09,969 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 15283 transitions. Word has length 23 [2021-06-05 05:14:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:09,969 INFO L482 AbstractCegarLoop]: Abstraction has 3647 states and 15283 transitions. [2021-06-05 05:14:09,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 15283 transitions. [2021-06-05 05:14:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:09,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:09,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:10,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:10,175 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2062244037, now seen corresponding path program 69 times [2021-06-05 05:14:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:10,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078313123] [2021-06-05 05:14:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:10,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:10,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078313123] [2021-06-05 05:14:10,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078313123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:10,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676230704] [2021-06-05 05:14:10,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:10,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:10,453 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:14:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:14:10,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:10,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:10,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:10,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 05:14:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:10,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676230704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:10,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:10,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:14:10,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275687542] [2021-06-05 05:14:10,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:14:10,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:14:10,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:14:10,585 INFO L87 Difference]: Start difference. First operand 3647 states and 15283 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:11,404 INFO L93 Difference]: Finished difference Result 3937 states and 16396 transitions. [2021-06-05 05:14:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:14:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:11,413 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 05:14:11,413 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 05:14:11,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:14:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 05:14:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3640. [2021-06-05 05:14:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 05:14:11,469 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 05:14:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:11,469 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 05:14:11,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 05:14:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:11,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:11,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:11,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:11,676 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1775122685, now seen corresponding path program 70 times [2021-06-05 05:14:11,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:11,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313381268] [2021-06-05 05:14:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:11,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:11,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313381268] [2021-06-05 05:14:11,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313381268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:11,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856692196] [2021-06-05 05:14:11,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:11,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:11,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:11,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:11,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:11,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:11,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:11,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:11,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:11,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:12,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856692196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:12,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:12,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496256153] [2021-06-05 05:14:12,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:12,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:12,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:12,114 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:12,748 INFO L93 Difference]: Finished difference Result 3892 states and 16214 transitions. [2021-06-05 05:14:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:14:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:12,757 INFO L225 Difference]: With dead ends: 3892 [2021-06-05 05:14:12,757 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 05:14:12,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:14:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 05:14:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3644. [2021-06-05 05:14:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 4.192972824595114) internal successors, (15275), 3643 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 15275 transitions. [2021-06-05 05:14:12,809 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 15275 transitions. Word has length 23 [2021-06-05 05:14:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:12,809 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 15275 transitions. [2021-06-05 05:14:12,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 15275 transitions. [2021-06-05 05:14:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:12,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:12,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:13,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 05:14:13,015 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1281905299, now seen corresponding path program 71 times [2021-06-05 05:14:13,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:13,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140192547] [2021-06-05 05:14:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:13,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140192547] [2021-06-05 05:14:13,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140192547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952724426] [2021-06-05 05:14:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:13,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:13,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:13,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:13,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:13,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:13,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:13,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:13,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952724426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:13,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:13,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:13,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002049811] [2021-06-05 05:14:13,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:13,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:13,406 INFO L87 Difference]: Start difference. First operand 3644 states and 15275 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:14,026 INFO L93 Difference]: Finished difference Result 3906 states and 16270 transitions. [2021-06-05 05:14:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:14,034 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 05:14:14,034 INFO L226 Difference]: Without dead ends: 3885 [2021-06-05 05:14:14,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-06-05 05:14:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3640. [2021-06-05 05:14:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 05:14:14,082 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 05:14:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:14,082 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 05:14:14,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 05:14:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:14,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:14,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:14,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:14,289 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2078285741, now seen corresponding path program 72 times [2021-06-05 05:14:14,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:14,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927265519] [2021-06-05 05:14:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:14,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927265519] [2021-06-05 05:14:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927265519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587830049] [2021-06-05 05:14:14,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:14,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:14,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:14,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:14,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:14,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:14,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:14,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587830049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451451772] [2021-06-05 05:14:14,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:14,677 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:15,321 INFO L93 Difference]: Finished difference Result 3895 states and 16224 transitions. [2021-06-05 05:14:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:14:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:15,328 INFO L225 Difference]: With dead ends: 3895 [2021-06-05 05:14:15,329 INFO L226 Difference]: Without dead ends: 3870 [2021-06-05 05:14:15,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:14:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-05 05:14:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3644. [2021-06-05 05:14:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 4.192972824595114) internal successors, (15275), 3643 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 15275 transitions. [2021-06-05 05:14:15,378 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 15275 transitions. Word has length 23 [2021-06-05 05:14:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:15,378 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 15275 transitions. [2021-06-05 05:14:15,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 15275 transitions. [2021-06-05 05:14:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:15,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:15,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:15,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:15,589 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1203989023, now seen corresponding path program 73 times [2021-06-05 05:14:15,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:15,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720748017] [2021-06-05 05:14:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:15,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:15,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720748017] [2021-06-05 05:14:15,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720748017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719246604] [2021-06-05 05:14:15,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:15,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:15,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:15,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:15,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:15,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:15,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:15,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719246604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:15,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:15,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833170174] [2021-06-05 05:14:15,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:15,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:15,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:15,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:15,982 INFO L87 Difference]: Start difference. First operand 3644 states and 15275 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:16,533 INFO L93 Difference]: Finished difference Result 3910 states and 16282 transitions. [2021-06-05 05:14:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:14:16,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:16,541 INFO L225 Difference]: With dead ends: 3910 [2021-06-05 05:14:16,541 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 05:14:16,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 05:14:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3640. [2021-06-05 05:14:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 05:14:16,592 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 05:14:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:16,592 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 05:14:16,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 05:14:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:16,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:16,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:16,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:16,798 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:16,798 INFO L82 PathProgramCache]: Analyzing trace with hash 859421919, now seen corresponding path program 74 times [2021-06-05 05:14:16,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:16,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324126285] [2021-06-05 05:14:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:16,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:16,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324126285] [2021-06-05 05:14:16,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324126285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:16,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031748264] [2021-06-05 05:14:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:16,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:16,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:17,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:17,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:17,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:17,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:17,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:17,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:17,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031748264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:17,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:17,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:17,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923544048] [2021-06-05 05:14:17,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:17,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:17,152 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:17,817 INFO L93 Difference]: Finished difference Result 4232 states and 17572 transitions. [2021-06-05 05:14:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:14:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:17,826 INFO L225 Difference]: With dead ends: 4232 [2021-06-05 05:14:17,826 INFO L226 Difference]: Without dead ends: 4210 [2021-06-05 05:14:17,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:14:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-06-05 05:14:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3652. [2021-06-05 05:14:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 4.191454396055875) internal successors, (15303), 3651 states have internal predecessors, (15303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 15303 transitions. [2021-06-05 05:14:17,882 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 15303 transitions. Word has length 23 [2021-06-05 05:14:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:17,882 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 15303 transitions. [2021-06-05 05:14:17,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 15303 transitions. [2021-06-05 05:14:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:17,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:17,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:18,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:18,088 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1444755871, now seen corresponding path program 75 times [2021-06-05 05:14:18,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:18,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453529816] [2021-06-05 05:14:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:18,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:18,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453529816] [2021-06-05 05:14:18,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453529816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:18,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43688611] [2021-06-05 05:14:18,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:18,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:14:18,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:18,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:18,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:18,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:18,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:18,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:18,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:18,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43688611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:18,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:18,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:18,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191138461] [2021-06-05 05:14:18,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:18,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:18,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:18,503 INFO L87 Difference]: Start difference. First operand 3652 states and 15303 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:19,560 INFO L93 Difference]: Finished difference Result 4128 states and 17141 transitions. [2021-06-05 05:14:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:14:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:19,569 INFO L225 Difference]: With dead ends: 4128 [2021-06-05 05:14:19,569 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 05:14:19,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 963.1ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:14:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 05:14:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3656. [2021-06-05 05:14:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191244870041039) internal successors, (15319), 3655 states have internal predecessors, (15319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15319 transitions. [2021-06-05 05:14:19,624 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15319 transitions. Word has length 23 [2021-06-05 05:14:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:19,624 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15319 transitions. [2021-06-05 05:14:19,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15319 transitions. [2021-06-05 05:14:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:19,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:19,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:19,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 05:14:19,830 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1236644691, now seen corresponding path program 76 times [2021-06-05 05:14:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:19,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400671802] [2021-06-05 05:14:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:20,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:20,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400671802] [2021-06-05 05:14:20,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400671802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:20,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524742921] [2021-06-05 05:14:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:20,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:20,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:20,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:20,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:20,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:20,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524742921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:20,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:20,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:20,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817630525] [2021-06-05 05:14:20,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:20,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:20,242 INFO L87 Difference]: Start difference. First operand 3656 states and 15319 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:20,502 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-05 05:14:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:21,081 INFO L93 Difference]: Finished difference Result 4082 states and 16965 transitions. [2021-06-05 05:14:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:21,088 INFO L225 Difference]: With dead ends: 4082 [2021-06-05 05:14:21,088 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 05:14:21,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 876.4ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:14:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 05:14:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3648. [2021-06-05 05:14:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3647 states have (on average 4.191115985741705) internal successors, (15285), 3647 states have internal predecessors, (15285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 15285 transitions. [2021-06-05 05:14:21,137 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 15285 transitions. Word has length 23 [2021-06-05 05:14:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:21,137 INFO L482 AbstractCegarLoop]: Abstraction has 3648 states and 15285 transitions. [2021-06-05 05:14:21,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 15285 transitions. [2021-06-05 05:14:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:21,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:21,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:21,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 05:14:21,342 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1208919297, now seen corresponding path program 77 times [2021-06-05 05:14:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:21,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522029807] [2021-06-05 05:14:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:21,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522029807] [2021-06-05 05:14:21,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522029807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534914552] [2021-06-05 05:14:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:21,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:21,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:21,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:21,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:21,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:21,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:21,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:21,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:21,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:21,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534914552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:21,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:21,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:21,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529293476] [2021-06-05 05:14:21,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:21,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:21,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:21,732 INFO L87 Difference]: Start difference. First operand 3648 states and 15285 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:22,495 INFO L93 Difference]: Finished difference Result 4272 states and 17685 transitions. [2021-06-05 05:14:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:14:22,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:22,504 INFO L225 Difference]: With dead ends: 4272 [2021-06-05 05:14:22,505 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 05:14:22,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 05:14:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3641. [2021-06-05 05:14:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 4.187637362637362) internal successors, (15243), 3640 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 15243 transitions. [2021-06-05 05:14:22,565 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 15243 transitions. Word has length 23 [2021-06-05 05:14:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:22,565 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 15243 transitions. [2021-06-05 05:14:22,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 15243 transitions. [2021-06-05 05:14:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:22,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:22,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:22,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 05:14:22,772 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1290318353, now seen corresponding path program 78 times [2021-06-05 05:14:22,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:22,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901931509] [2021-06-05 05:14:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:22,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:22,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901931509] [2021-06-05 05:14:22,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901931509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:22,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234129519] [2021-06-05 05:14:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:22,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:22,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:23,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:23,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:23,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:23,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:23,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:23,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:23,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234129519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288269097] [2021-06-05 05:14:23,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:23,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:23,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:23,208 INFO L87 Difference]: Start difference. First operand 3641 states and 15243 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:24,177 INFO L93 Difference]: Finished difference Result 4077 states and 16923 transitions. [2021-06-05 05:14:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:14:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:24,185 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 05:14:24,185 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 05:14:24,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 907.7ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:14:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 05:14:24,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3645. [2021-06-05 05:14:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.187431394072448) internal successors, (15259), 3644 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15259 transitions. [2021-06-05 05:14:24,238 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15259 transitions. Word has length 23 [2021-06-05 05:14:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:24,238 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15259 transitions. [2021-06-05 05:14:24,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15259 transitions. [2021-06-05 05:14:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:24,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:24,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:24,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 05:14:24,445 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1391082209, now seen corresponding path program 79 times [2021-06-05 05:14:24,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:24,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570344750] [2021-06-05 05:14:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:24,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:24,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570344750] [2021-06-05 05:14:24,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570344750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:24,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059106368] [2021-06-05 05:14:24,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:24,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:24,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:24,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:24,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:24,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:24,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:24,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:24,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059106368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:24,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:24,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:24,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278848672] [2021-06-05 05:14:24,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:24,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:24,840 INFO L87 Difference]: Start difference. First operand 3645 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:25,762 INFO L93 Difference]: Finished difference Result 4052 states and 16830 transitions. [2021-06-05 05:14:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:25,771 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 05:14:25,771 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 05:14:25,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 05:14:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3625. [2021-06-05 05:14:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.186258278145695) internal successors, (15171), 3624 states have internal predecessors, (15171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15171 transitions. [2021-06-05 05:14:25,827 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15171 transitions. Word has length 23 [2021-06-05 05:14:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:25,827 INFO L482 AbstractCegarLoop]: Abstraction has 3625 states and 15171 transitions. [2021-06-05 05:14:25,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15171 transitions. [2021-06-05 05:14:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:25,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:25,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:26,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:26,033 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 925880935, now seen corresponding path program 80 times [2021-06-05 05:14:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:26,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472640504] [2021-06-05 05:14:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:26,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:26,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472640504] [2021-06-05 05:14:26,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472640504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:26,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849725267] [2021-06-05 05:14:26,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:26,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:26,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:26,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:26,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:26,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:26,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:26,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:26,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:26,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:26,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849725267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:26,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:26,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:26,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847958586] [2021-06-05 05:14:26,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:26,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:26,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:26,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:26,422 INFO L87 Difference]: Start difference. First operand 3625 states and 15171 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:27,022 INFO L93 Difference]: Finished difference Result 4150 states and 17232 transitions. [2021-06-05 05:14:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:14:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:27,030 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:14:27,030 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 05:14:27,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 576.3ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:14:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 05:14:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3633. [2021-06-05 05:14:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 4.186398678414097) internal successors, (15205), 3632 states have internal predecessors, (15205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 15205 transitions. [2021-06-05 05:14:27,081 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 15205 transitions. Word has length 23 [2021-06-05 05:14:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:27,082 INFO L482 AbstractCegarLoop]: Abstraction has 3633 states and 15205 transitions. [2021-06-05 05:14:27,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 15205 transitions. [2021-06-05 05:14:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:27,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:27,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:27,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 05:14:27,288 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1511214887, now seen corresponding path program 81 times [2021-06-05 05:14:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:27,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140000346] [2021-06-05 05:14:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:27,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:27,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140000346] [2021-06-05 05:14:27,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140000346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:27,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807699898] [2021-06-05 05:14:27,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:27,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:27,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:27,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:27,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:27,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:27,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:27,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:27,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:27,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807699898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:27,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:27,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018014983] [2021-06-05 05:14:27,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:27,654 INFO L87 Difference]: Start difference. First operand 3633 states and 15205 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:28,530 INFO L93 Difference]: Finished difference Result 4049 states and 16819 transitions. [2021-06-05 05:14:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:28,538 INFO L225 Difference]: With dead ends: 4049 [2021-06-05 05:14:28,538 INFO L226 Difference]: Without dead ends: 4023 [2021-06-05 05:14:28,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 822.6ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2021-06-05 05:14:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3637. [2021-06-05 05:14:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 4.186193619361936) internal successors, (15221), 3636 states have internal predecessors, (15221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 15221 transitions. [2021-06-05 05:14:28,587 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 15221 transitions. Word has length 23 [2021-06-05 05:14:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:28,587 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 15221 transitions. [2021-06-05 05:14:28,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 15221 transitions. [2021-06-05 05:14:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:28,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:28,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:28,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 05:14:28,793 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1170185675, now seen corresponding path program 82 times [2021-06-05 05:14:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:28,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058153470] [2021-06-05 05:14:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:28,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:28,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058153470] [2021-06-05 05:14:28,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058153470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:28,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264608669] [2021-06-05 05:14:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:28,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:28,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:28,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:29,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:29,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:29,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:29,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:29,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:29,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264608669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:29,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:29,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194803439] [2021-06-05 05:14:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:29,158 INFO L87 Difference]: Start difference. First operand 3637 states and 15221 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:30,002 INFO L93 Difference]: Finished difference Result 4005 states and 16651 transitions. [2021-06-05 05:14:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:14:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:30,011 INFO L225 Difference]: With dead ends: 4005 [2021-06-05 05:14:30,011 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 05:14:30,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 740.2ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 05:14:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3629. [2021-06-05 05:14:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.186052921719956) internal successors, (15187), 3628 states have internal predecessors, (15187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15187 transitions. [2021-06-05 05:14:30,061 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15187 transitions. Word has length 23 [2021-06-05 05:14:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:30,061 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15187 transitions. [2021-06-05 05:14:30,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15187 transitions. [2021-06-05 05:14:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:30,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:30,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:30,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 05:14:30,267 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1080318453, now seen corresponding path program 83 times [2021-06-05 05:14:30,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:30,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849470762] [2021-06-05 05:14:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:30,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849470762] [2021-06-05 05:14:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849470762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343028772] [2021-06-05 05:14:30,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:30,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:30,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:30,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:30,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:30,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:30,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:30,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:30,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343028772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:30,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:30,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:30,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379862172] [2021-06-05 05:14:30,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:30,640 INFO L87 Difference]: Start difference. First operand 3629 states and 15187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:31,152 INFO L93 Difference]: Finished difference Result 3993 states and 16603 transitions. [2021-06-05 05:14:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:31,160 INFO L225 Difference]: With dead ends: 3993 [2021-06-05 05:14:31,160 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 05:14:31,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 05:14:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3621. [2021-06-05 05:14:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 4.185911602209945) internal successors, (15153), 3620 states have internal predecessors, (15153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 15153 transitions. [2021-06-05 05:14:31,235 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 15153 transitions. Word has length 23 [2021-06-05 05:14:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:31,235 INFO L482 AbstractCegarLoop]: Abstraction has 3621 states and 15153 transitions. [2021-06-05 05:14:31,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 15153 transitions. [2021-06-05 05:14:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:31,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:31,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:31,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:31,441 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1750800029, now seen corresponding path program 84 times [2021-06-05 05:14:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:31,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134586607] [2021-06-05 05:14:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:31,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:31,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134586607] [2021-06-05 05:14:31,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134586607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:31,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782916924] [2021-06-05 05:14:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:31,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:14:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:14:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:31,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 05:14:31,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:31,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:31,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:14:31,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 05:14:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:31,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782916924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:31,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:31,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:14:31,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991398019] [2021-06-05 05:14:31,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:14:31,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:14:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:14:31,801 INFO L87 Difference]: Start difference. First operand 3621 states and 15153 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:32,422 INFO L93 Difference]: Finished difference Result 3897 states and 16215 transitions. [2021-06-05 05:14:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:14:32,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:32,430 INFO L225 Difference]: With dead ends: 3897 [2021-06-05 05:14:32,430 INFO L226 Difference]: Without dead ends: 3875 [2021-06-05 05:14:32,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:14:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-05 05:14:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3625. [2021-06-05 05:14:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.186258278145695) internal successors, (15171), 3624 states have internal predecessors, (15171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15171 transitions. [2021-06-05 05:14:32,482 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15171 transitions. Word has length 23 [2021-06-05 05:14:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:32,482 INFO L482 AbstractCegarLoop]: Abstraction has 3625 states and 15171 transitions. [2021-06-05 05:14:32,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15171 transitions. [2021-06-05 05:14:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:32,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:32,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:32,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:32,689 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1237273177, now seen corresponding path program 85 times [2021-06-05 05:14:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:32,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725735847] [2021-06-05 05:14:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:32,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725735847] [2021-06-05 05:14:32,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725735847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480483013] [2021-06-05 05:14:32,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:32,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:32,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:32,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:32,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:32,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:32,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480483013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:33,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:33,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623135457] [2021-06-05 05:14:33,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:33,042 INFO L87 Difference]: Start difference. First operand 3625 states and 15171 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:33,777 INFO L93 Difference]: Finished difference Result 3860 states and 16055 transitions. [2021-06-05 05:14:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:14:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:33,785 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 05:14:33,785 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 05:14:33,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 05:14:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3629. [2021-06-05 05:14:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.186052921719956) internal successors, (15187), 3628 states have internal predecessors, (15187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15187 transitions. [2021-06-05 05:14:33,833 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15187 transitions. Word has length 23 [2021-06-05 05:14:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:33,833 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15187 transitions. [2021-06-05 05:14:33,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15187 transitions. [2021-06-05 05:14:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:33,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:33,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:34,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:34,039 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash -161562021, now seen corresponding path program 86 times [2021-06-05 05:14:34,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:34,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416013745] [2021-06-05 05:14:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:34,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:34,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416013745] [2021-06-05 05:14:34,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416013745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:34,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479948313] [2021-06-05 05:14:34,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:34,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:34,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:34,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:34,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:34,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:34,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:34,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:34,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:34,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:34,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:34,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479948313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:34,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:34,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:34,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828971984] [2021-06-05 05:14:34,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:34,401 INFO L87 Difference]: Start difference. First operand 3629 states and 15187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:35,025 INFO L93 Difference]: Finished difference Result 3848 states and 16015 transitions. [2021-06-05 05:14:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:14:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:35,033 INFO L225 Difference]: With dead ends: 3848 [2021-06-05 05:14:35,033 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 05:14:35,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 05:14:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3621. [2021-06-05 05:14:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 4.185911602209945) internal successors, (15153), 3620 states have internal predecessors, (15153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 15153 transitions. [2021-06-05 05:14:35,080 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 15153 transitions. Word has length 23 [2021-06-05 05:14:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:35,080 INFO L482 AbstractCegarLoop]: Abstraction has 3621 states and 15153 transitions. [2021-06-05 05:14:35,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 15153 transitions. [2021-06-05 05:14:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:35,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:35,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:35,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 05:14:35,286 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 119433831, now seen corresponding path program 87 times [2021-06-05 05:14:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:35,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170316389] [2021-06-05 05:14:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:35,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170316389] [2021-06-05 05:14:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170316389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290413393] [2021-06-05 05:14:35,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:35,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:35,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:35,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:35,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:35,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:35,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:35,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:35,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290413393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:35,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:35,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:35,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448384858] [2021-06-05 05:14:35,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:35,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:35,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:35,769 INFO L87 Difference]: Start difference. First operand 3621 states and 15153 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:36,547 INFO L93 Difference]: Finished difference Result 3860 states and 16065 transitions. [2021-06-05 05:14:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:36,558 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 05:14:36,558 INFO L226 Difference]: Without dead ends: 3834 [2021-06-05 05:14:36,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-06-05 05:14:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3630. [2021-06-05 05:14:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.184348305318269) internal successors, (15185), 3629 states have internal predecessors, (15185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15185 transitions. [2021-06-05 05:14:36,638 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15185 transitions. Word has length 23 [2021-06-05 05:14:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:36,638 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15185 transitions. [2021-06-05 05:14:36,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15185 transitions. [2021-06-05 05:14:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:36,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:36,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:36,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 05:14:36,863 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -922142237, now seen corresponding path program 88 times [2021-06-05 05:14:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:36,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733667949] [2021-06-05 05:14:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:37,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:37,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733667949] [2021-06-05 05:14:37,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733667949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:37,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798202560] [2021-06-05 05:14:37,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:37,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:37,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:37,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:37,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:37,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:37,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:37,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:37,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:37,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798202560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:37,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:37,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:37,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774207946] [2021-06-05 05:14:37,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:37,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:37,340 INFO L87 Difference]: Start difference. First operand 3630 states and 15185 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:38,241 INFO L93 Difference]: Finished difference Result 3920 states and 16297 transitions. [2021-06-05 05:14:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:14:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:38,252 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 05:14:38,252 INFO L226 Difference]: Without dead ends: 3892 [2021-06-05 05:14:38,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 776.8ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:14:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-05 05:14:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3623. [2021-06-05 05:14:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.185808945334069) internal successors, (15161), 3622 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15161 transitions. [2021-06-05 05:14:38,369 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15161 transitions. Word has length 23 [2021-06-05 05:14:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:38,369 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15161 transitions. [2021-06-05 05:14:38,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15161 transitions. [2021-06-05 05:14:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:38,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:38,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:38,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:38,599 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1209263589, now seen corresponding path program 89 times [2021-06-05 05:14:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:38,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318579991] [2021-06-05 05:14:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:38,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:38,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318579991] [2021-06-05 05:14:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318579991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845343047] [2021-06-05 05:14:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:38,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:38,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:38,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:38,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:38,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:38,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:38,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:38,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:39,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845343047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:39,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:39,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:39,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032244975] [2021-06-05 05:14:39,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:39,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:39,084 INFO L87 Difference]: Start difference. First operand 3623 states and 15161 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:39,878 INFO L93 Difference]: Finished difference Result 3766 states and 15685 transitions. [2021-06-05 05:14:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:14:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:39,887 INFO L225 Difference]: With dead ends: 3766 [2021-06-05 05:14:39,887 INFO L226 Difference]: Without dead ends: 3740 [2021-06-05 05:14:39,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 796.9ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:14:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-06-05 05:14:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3627. [2021-06-05 05:14:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185603971318257) internal successors, (15177), 3626 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15177 transitions. [2021-06-05 05:14:39,955 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15177 transitions. Word has length 23 [2021-06-05 05:14:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:39,955 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15177 transitions. [2021-06-05 05:14:39,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15177 transitions. [2021-06-05 05:14:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:39,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:39,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:40,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 05:14:40,184 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:40,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:40,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1702480975, now seen corresponding path program 90 times [2021-06-05 05:14:40,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:40,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829526165] [2021-06-05 05:14:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:40,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:40,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829526165] [2021-06-05 05:14:40,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829526165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:40,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794163721] [2021-06-05 05:14:40,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:40,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:40,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:40,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:40,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:40,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:40,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:40,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:40,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:40,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794163721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:40,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:40,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:40,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846291056] [2021-06-05 05:14:40,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:40,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:40,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:40,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:40,667 INFO L87 Difference]: Start difference. First operand 3627 states and 15177 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,016 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-06-05 05:14:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:41,505 INFO L93 Difference]: Finished difference Result 3816 states and 15891 transitions. [2021-06-05 05:14:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:41,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:41,514 INFO L225 Difference]: With dead ends: 3816 [2021-06-05 05:14:41,514 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 05:14:41,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 787.1ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 05:14:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3623. [2021-06-05 05:14:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.185808945334069) internal successors, (15161), 3622 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15161 transitions. [2021-06-05 05:14:41,583 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15161 transitions. Word has length 23 [2021-06-05 05:14:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:41,583 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15161 transitions. [2021-06-05 05:14:41,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15161 transitions. [2021-06-05 05:14:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:41,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:41,590 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:41,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 05:14:41,813 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash -767704719, now seen corresponding path program 91 times [2021-06-05 05:14:41,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:41,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170738313] [2021-06-05 05:14:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:42,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170738313] [2021-06-05 05:14:42,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170738313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197134032] [2021-06-05 05:14:42,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:42,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:42,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:42,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:42,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:42,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:42,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:42,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197134032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:42,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:42,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:42,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087584702] [2021-06-05 05:14:42,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:42,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:42,373 INFO L87 Difference]: Start difference. First operand 3623 states and 15161 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:43,166 INFO L93 Difference]: Finished difference Result 3832 states and 15943 transitions. [2021-06-05 05:14:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:14:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:43,176 INFO L225 Difference]: With dead ends: 3832 [2021-06-05 05:14:43,176 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 05:14:43,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:14:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 05:14:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 3627. [2021-06-05 05:14:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185603971318257) internal successors, (15177), 3626 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15177 transitions. [2021-06-05 05:14:43,241 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15177 transitions. Word has length 23 [2021-06-05 05:14:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:43,241 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15177 transitions. [2021-06-05 05:14:43,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15177 transitions. [2021-06-05 05:14:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:43,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:43,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:43,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:43,470 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1780397251, now seen corresponding path program 92 times [2021-06-05 05:14:43,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:43,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574021815] [2021-06-05 05:14:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:43,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:43,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574021815] [2021-06-05 05:14:43,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574021815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:43,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405439615] [2021-06-05 05:14:43,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:43,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:43,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:43,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:43,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:43,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:43,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:43,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:14:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:43,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405439615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:43,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:43,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:43,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675483527] [2021-06-05 05:14:43,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:43,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:43,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:43,983 INFO L87 Difference]: Start difference. First operand 3627 states and 15177 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:44,283 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-06-05 05:14:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:44,612 INFO L93 Difference]: Finished difference Result 3820 states and 15903 transitions. [2021-06-05 05:14:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:14:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:44,622 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 05:14:44,622 INFO L226 Difference]: Without dead ends: 3799 [2021-06-05 05:14:44,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2021-06-05 05:14:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3619. [2021-06-05 05:14:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 4.185737976782753) internal successors, (15144), 3618 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 15144 transitions. [2021-06-05 05:14:44,688 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 15144 transitions. Word has length 23 [2021-06-05 05:14:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:44,688 INFO L482 AbstractCegarLoop]: Abstraction has 3619 states and 15144 transitions. [2021-06-05 05:14:44,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 15144 transitions. [2021-06-05 05:14:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:44,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:44,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:44,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 05:14:44,913 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash -37050447, now seen corresponding path program 93 times [2021-06-05 05:14:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:44,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252784293] [2021-06-05 05:14:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:45,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:45,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252784293] [2021-06-05 05:14:45,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252784293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:45,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915397447] [2021-06-05 05:14:45,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:45,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:14:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:45,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2021-06-05 05:14:45,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:45,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:45,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:45,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:31 [2021-06-05 05:14:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915397447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522527455] [2021-06-05 05:14:45,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:45,296 INFO L87 Difference]: Start difference. First operand 3619 states and 15144 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:45,739 INFO L93 Difference]: Finished difference Result 3845 states and 16010 transitions. [2021-06-05 05:14:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:45,747 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 05:14:45,748 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 05:14:45,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 05:14:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3615. [2021-06-05 05:14:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 4.185943552850028) internal successors, (15128), 3614 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 15128 transitions. [2021-06-05 05:14:45,801 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 15128 transitions. Word has length 23 [2021-06-05 05:14:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:45,801 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 15128 transitions. [2021-06-05 05:14:45,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 15128 transitions. [2021-06-05 05:14:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:45,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:45,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:46,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:46,007 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 634766705, now seen corresponding path program 94 times [2021-06-05 05:14:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:46,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411362067] [2021-06-05 05:14:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:46,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:46,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411362067] [2021-06-05 05:14:46,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411362067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:46,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629983261] [2021-06-05 05:14:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:46,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:46,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:46,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:46,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:46,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:46,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:46,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:46,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:46,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629983261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:46,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:46,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:46,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186063248] [2021-06-05 05:14:46,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:46,385 INFO L87 Difference]: Start difference. First operand 3615 states and 15128 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:46,992 INFO L93 Difference]: Finished difference Result 3905 states and 16247 transitions. [2021-06-05 05:14:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:14:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:47,000 INFO L225 Difference]: With dead ends: 3905 [2021-06-05 05:14:47,000 INFO L226 Difference]: Without dead ends: 3883 [2021-06-05 05:14:47,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:14:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2021-06-05 05:14:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 3623. [2021-06-05 05:14:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.1860850358917725) internal successors, (15162), 3622 states have internal predecessors, (15162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15162 transitions. [2021-06-05 05:14:47,050 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15162 transitions. Word has length 23 [2021-06-05 05:14:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:47,050 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15162 transitions. [2021-06-05 05:14:47,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15162 transitions. [2021-06-05 05:14:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:47,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:47,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:47,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 05:14:47,256 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1148293557, now seen corresponding path program 95 times [2021-06-05 05:14:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:47,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618940868] [2021-06-05 05:14:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:47,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:47,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618940868] [2021-06-05 05:14:47,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618940868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774046642] [2021-06-05 05:14:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:47,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:14:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:47,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:47,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:47,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:47,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:47,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:47,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774046642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:47,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:47,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941413637] [2021-06-05 05:14:47,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:47,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:47,602 INFO L87 Difference]: Start difference. First operand 3623 states and 15162 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:48,408 INFO L93 Difference]: Finished difference Result 3907 states and 16243 transitions. [2021-06-05 05:14:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:14:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:48,417 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 05:14:48,417 INFO L226 Difference]: Without dead ends: 3882 [2021-06-05 05:14:48,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:48,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-05 05:14:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3627. [2021-06-05 05:14:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185879757308329) internal successors, (15178), 3626 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15178 transitions. [2021-06-05 05:14:48,472 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15178 transitions. Word has length 23 [2021-06-05 05:14:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:48,472 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15178 transitions. [2021-06-05 05:14:48,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15178 transitions. [2021-06-05 05:14:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:48,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:48,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:48,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:48,678 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2070962583, now seen corresponding path program 96 times [2021-06-05 05:14:48,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:48,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487861765] [2021-06-05 05:14:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:48,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:48,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487861765] [2021-06-05 05:14:48,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487861765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:48,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145632185] [2021-06-05 05:14:48,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:48,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:14:48,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:48,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:48,967 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:14:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 64 [2021-06-05 05:14:48,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:48,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:48,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:48,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2021-06-05 05:14:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:49,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145632185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:49,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:49,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:14:49,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028992130] [2021-06-05 05:14:49,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:14:49,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:49,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:14:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:14:49,056 INFO L87 Difference]: Start difference. First operand 3627 states and 15178 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:49,742 INFO L93 Difference]: Finished difference Result 3938 states and 16373 transitions. [2021-06-05 05:14:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:14:49,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:49,750 INFO L225 Difference]: With dead ends: 3938 [2021-06-05 05:14:49,750 INFO L226 Difference]: Without dead ends: 3917 [2021-06-05 05:14:49,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:14:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-06-05 05:14:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3619. [2021-06-05 05:14:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 4.185737976782753) internal successors, (15144), 3618 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 15144 transitions. [2021-06-05 05:14:49,800 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 15144 transitions. Word has length 23 [2021-06-05 05:14:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:49,800 INFO L482 AbstractCegarLoop]: Abstraction has 3619 states and 15144 transitions. [2021-06-05 05:14:49,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 15144 transitions. [2021-06-05 05:14:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:49,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:49,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:50,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:50,006 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1900147651, now seen corresponding path program 97 times [2021-06-05 05:14:50,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:50,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617260928] [2021-06-05 05:14:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:50,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617260928] [2021-06-05 05:14:50,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617260928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016739245] [2021-06-05 05:14:50,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:50,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:50,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:50,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:50,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:50,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016739245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:50,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:50,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:50,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322849095] [2021-06-05 05:14:50,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:50,373 INFO L87 Difference]: Start difference. First operand 3619 states and 15144 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:50,839 INFO L93 Difference]: Finished difference Result 3845 states and 16010 transitions. [2021-06-05 05:14:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:14:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:50,847 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 05:14:50,847 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 05:14:50,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 05:14:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3615. [2021-06-05 05:14:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 4.185943552850028) internal successors, (15128), 3614 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 15128 transitions. [2021-06-05 05:14:50,893 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 15128 transitions. Word has length 23 [2021-06-05 05:14:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:50,893 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 15128 transitions. [2021-06-05 05:14:50,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 15128 transitions. [2021-06-05 05:14:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:50,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:50,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:51,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 05:14:51,098 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1294245051, now seen corresponding path program 35 times [2021-06-05 05:14:51,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:51,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183851417] [2021-06-05 05:14:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:51,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:51,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183851417] [2021-06-05 05:14:51,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183851417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:51,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355905432] [2021-06-05 05:14:51,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:51,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:14:51,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:51,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:51,346 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 05:14:51,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 05:14:51,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:51,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:51,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:51,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:29 [2021-06-05 05:14:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:51,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355905432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:51,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:51,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:51,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233623450] [2021-06-05 05:14:51,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:51,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:51,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:51,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:51,425 INFO L87 Difference]: Start difference. First operand 3615 states and 15128 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:52,236 INFO L93 Difference]: Finished difference Result 4559 states and 18845 transitions. [2021-06-05 05:14:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:52,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:52,245 INFO L225 Difference]: With dead ends: 4559 [2021-06-05 05:14:52,245 INFO L226 Difference]: Without dead ends: 4535 [2021-06-05 05:14:52,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:14:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2021-06-05 05:14:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 3639. [2021-06-05 05:14:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 4.188565145684442) internal successors, (15238), 3638 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 15238 transitions. [2021-06-05 05:14:52,305 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 15238 transitions. Word has length 23 [2021-06-05 05:14:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:52,305 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 15238 transitions. [2021-06-05 05:14:52,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 15238 transitions. [2021-06-05 05:14:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:52,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:52,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:52,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:52,511 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:52,511 INFO L82 PathProgramCache]: Analyzing trace with hash 388084091, now seen corresponding path program 36 times [2021-06-05 05:14:52,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:52,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568356759] [2021-06-05 05:14:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568356759] [2021-06-05 05:14:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568356759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886763919] [2021-06-05 05:14:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:52,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:14:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:52,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:52,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:52,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:52,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:52,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:52,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886763919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:52,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:52,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:52,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68455012] [2021-06-05 05:14:52,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:52,865 INFO L87 Difference]: Start difference. First operand 3639 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:53,700 INFO L93 Difference]: Finished difference Result 4391 states and 18168 transitions. [2021-06-05 05:14:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:53,709 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 05:14:53,709 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 05:14:53,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 05:14:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3645. [2021-06-05 05:14:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.188254665203074) internal successors, (15262), 3644 states have internal predecessors, (15262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15262 transitions. [2021-06-05 05:14:53,761 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15262 transitions. Word has length 23 [2021-06-05 05:14:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15262 transitions. [2021-06-05 05:14:53,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15262 transitions. [2021-06-05 05:14:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:53,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:53,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:53,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 05:14:53,967 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1463795247, now seen corresponding path program 37 times [2021-06-05 05:14:53,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:53,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487432248] [2021-06-05 05:14:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:54,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:54,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487432248] [2021-06-05 05:14:54,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487432248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:54,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281997995] [2021-06-05 05:14:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:54,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:54,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:54,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:54,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:54,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:54,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:54,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:54,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281997995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:54,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:54,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:54,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324011755] [2021-06-05 05:14:54,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:54,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:54,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:54,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:54,296 INFO L87 Difference]: Start difference. First operand 3645 states and 15262 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:55,124 INFO L93 Difference]: Finished difference Result 4372 states and 18083 transitions. [2021-06-05 05:14:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:55,133 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 05:14:55,133 INFO L226 Difference]: Without dead ends: 4349 [2021-06-05 05:14:55,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 742.3ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-06-05 05:14:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3639. [2021-06-05 05:14:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 4.188565145684442) internal successors, (15238), 3638 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 15238 transitions. [2021-06-05 05:14:55,186 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 15238 transitions. Word has length 23 [2021-06-05 05:14:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:55,186 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 15238 transitions. [2021-06-05 05:14:55,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 15238 transitions. [2021-06-05 05:14:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:55,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:55,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:55,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:55,392 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1129036189, now seen corresponding path program 38 times [2021-06-05 05:14:55,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:55,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400267123] [2021-06-05 05:14:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:55,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:55,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400267123] [2021-06-05 05:14:55,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400267123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:55,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440922716] [2021-06-05 05:14:55,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:55,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:55,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:55,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:55,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:55,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:55,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:55,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:55,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440922716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:55,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:55,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:55,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987319133] [2021-06-05 05:14:55,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:55,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:55,701 INFO L87 Difference]: Start difference. First operand 3639 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:56,521 INFO L93 Difference]: Finished difference Result 4562 states and 18841 transitions. [2021-06-05 05:14:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:56,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:56,531 INFO L225 Difference]: With dead ends: 4562 [2021-06-05 05:14:56,532 INFO L226 Difference]: Without dead ends: 4531 [2021-06-05 05:14:56,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2021-06-05 05:14:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 3656. [2021-06-05 05:14:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191518467852257) internal successors, (15320), 3655 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15320 transitions. [2021-06-05 05:14:56,590 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15320 transitions. Word has length 23 [2021-06-05 05:14:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:56,590 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15320 transitions. [2021-06-05 05:14:56,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15320 transitions. [2021-06-05 05:14:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:56,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:56,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:56,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:56,797 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1716781511, now seen corresponding path program 39 times [2021-06-05 05:14:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:56,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101038898] [2021-06-05 05:14:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:56,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:56,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101038898] [2021-06-05 05:14:56,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101038898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:56,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049686043] [2021-06-05 05:14:56,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:56,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:14:56,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:56,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:57,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:57,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:57,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:57,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:57,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:57,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:57,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049686043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:57,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:57,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:57,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055186830] [2021-06-05 05:14:57,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:57,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:57,128 INFO L87 Difference]: Start difference. First operand 3656 states and 15320 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:57,862 INFO L93 Difference]: Finished difference Result 4334 states and 17962 transitions. [2021-06-05 05:14:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:57,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:57,871 INFO L225 Difference]: With dead ends: 4334 [2021-06-05 05:14:57,872 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 05:14:57,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:14:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 05:14:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3662. [2021-06-05 05:14:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 3661 states have (on average 4.191204588910134) internal successors, (15344), 3661 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 15344 transitions. [2021-06-05 05:14:57,931 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 15344 transitions. Word has length 23 [2021-06-05 05:14:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:57,931 INFO L482 AbstractCegarLoop]: Abstraction has 3662 states and 15344 transitions. [2021-06-05 05:14:57,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 15344 transitions. [2021-06-05 05:14:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:57,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:57,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:58,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 05:14:58,138 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1502474629, now seen corresponding path program 40 times [2021-06-05 05:14:58,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:58,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503687820] [2021-06-05 05:14:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:58,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:58,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503687820] [2021-06-05 05:14:58,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503687820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:58,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845713498] [2021-06-05 05:14:58,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:58,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:58,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:58,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:58,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:14:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:58,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845713498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:58,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:58,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:58,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052774735] [2021-06-05 05:14:58,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:58,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:58,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:58,475 INFO L87 Difference]: Start difference. First operand 3662 states and 15344 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:59,350 INFO L93 Difference]: Finished difference Result 4322 states and 17901 transitions. [2021-06-05 05:14:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:14:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:14:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:59,359 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 05:14:59,359 INFO L226 Difference]: Without dead ends: 4299 [2021-06-05 05:14:59,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 665.3ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:14:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4299 states. [2021-06-05 05:14:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4299 to 3656. [2021-06-05 05:14:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191518467852257) internal successors, (15320), 3655 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15320 transitions. [2021-06-05 05:14:59,410 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15320 transitions. Word has length 23 [2021-06-05 05:14:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:59,410 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15320 transitions. [2021-06-05 05:14:59,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15320 transitions. [2021-06-05 05:14:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:14:59,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:59,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:59,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:59,616 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1120166395, now seen corresponding path program 41 times [2021-06-05 05:14:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:59,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951428534] [2021-06-05 05:14:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:59,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:59,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951428534] [2021-06-05 05:14:59,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951428534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:59,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693681133] [2021-06-05 05:14:59,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:59,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:59,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:14:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:59,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:59,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:59,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:59,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:59,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:59,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:14:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:59,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693681133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:59,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:59,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:14:59,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869212444] [2021-06-05 05:14:59,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:14:59,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:59,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:14:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:14:59,923 INFO L87 Difference]: Start difference. First operand 3656 states and 15320 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:00,580 INFO L93 Difference]: Finished difference Result 4199 states and 17420 transitions. [2021-06-05 05:15:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:15:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:00,589 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 05:15:00,589 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 05:15:00,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:15:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 05:15:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3677. [2021-06-05 05:15:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 4.1901523394994555) internal successors, (15403), 3676 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 15403 transitions. [2021-06-05 05:15:00,649 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 15403 transitions. Word has length 23 [2021-06-05 05:15:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:00,649 INFO L482 AbstractCegarLoop]: Abstraction has 3677 states and 15403 transitions. [2021-06-05 05:15:00,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 15403 transitions. [2021-06-05 05:15:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:00,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:00,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:00,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 05:15:00,855 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:00,856 INFO L82 PathProgramCache]: Analyzing trace with hash -208531025, now seen corresponding path program 42 times [2021-06-05 05:15:00,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:00,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421582605] [2021-06-05 05:15:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:00,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421582605] [2021-06-05 05:15:00,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421582605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110128673] [2021-06-05 05:15:00,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:00,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:00,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:00,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:00,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:01,111 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:15:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:15:01,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:01,135 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 05:15:01,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:01,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:15:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:01,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110128673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:01,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:01,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:01,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185872276] [2021-06-05 05:15:01,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:01,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:01,178 INFO L87 Difference]: Start difference. First operand 3677 states and 15403 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:01,811 INFO L93 Difference]: Finished difference Result 4199 states and 17414 transitions. [2021-06-05 05:15:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:01,820 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 05:15:01,820 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 05:15:01,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:15:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 05:15:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3683. [2021-06-05 05:15:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 4.190928843020098) internal successors, (15431), 3682 states have internal predecessors, (15431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 15431 transitions. [2021-06-05 05:15:01,874 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 15431 transitions. Word has length 23 [2021-06-05 05:15:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:01,874 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 15431 transitions. [2021-06-05 05:15:01,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 15431 transitions. [2021-06-05 05:15:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:01,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:01,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:02,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:02,082 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash 379214297, now seen corresponding path program 43 times [2021-06-05 05:15:02,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:02,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573853107] [2021-06-05 05:15:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:02,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:02,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573853107] [2021-06-05 05:15:02,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573853107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:02,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113300963] [2021-06-05 05:15:02,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:02,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:02,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:02,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:02,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:02,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:02,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:02,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113300963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:02,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:02,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:02,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970225650] [2021-06-05 05:15:02,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:02,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:02,454 INFO L87 Difference]: Start difference. First operand 3683 states and 15431 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:03,287 INFO L93 Difference]: Finished difference Result 4103 states and 17052 transitions. [2021-06-05 05:15:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:15:03,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:03,295 INFO L225 Difference]: With dead ends: 4103 [2021-06-05 05:15:03,295 INFO L226 Difference]: Without dead ends: 4075 [2021-06-05 05:15:03,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:15:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2021-06-05 05:15:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 3689. [2021-06-05 05:15:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3688 states have (on average 4.190618221258134) internal successors, (15455), 3688 states have internal predecessors, (15455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 15455 transitions. [2021-06-05 05:15:03,346 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 15455 transitions. Word has length 23 [2021-06-05 05:15:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:03,346 INFO L482 AbstractCegarLoop]: Abstraction has 3689 states and 15455 transitions. [2021-06-05 05:15:03,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 15455 transitions. [2021-06-05 05:15:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:03,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:03,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:03,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 05:15:03,552 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1454925453, now seen corresponding path program 44 times [2021-06-05 05:15:03,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:03,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518223752] [2021-06-05 05:15:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:03,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518223752] [2021-06-05 05:15:03,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518223752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110294060] [2021-06-05 05:15:03,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:03,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:03,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:03,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:03,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:03,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:03,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:03,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:03,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:03,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:03,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:03,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110294060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:03,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:03,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:03,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345524821] [2021-06-05 05:15:03,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:03,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:03,930 INFO L87 Difference]: Start difference. First operand 3689 states and 15455 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:04,792 INFO L93 Difference]: Finished difference Result 4219 states and 17490 transitions. [2021-06-05 05:15:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:04,801 INFO L225 Difference]: With dead ends: 4219 [2021-06-05 05:15:04,801 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 05:15:04,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 05:15:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3677. [2021-06-05 05:15:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 4.1901523394994555) internal successors, (15403), 3676 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 15403 transitions. [2021-06-05 05:15:04,853 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 15403 transitions. Word has length 23 [2021-06-05 05:15:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:04,854 INFO L482 AbstractCegarLoop]: Abstraction has 3677 states and 15403 transitions. [2021-06-05 05:15:04,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 15403 transitions. [2021-06-05 05:15:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:04,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:04,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:05,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 05:15:05,060 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:05,060 INFO L82 PathProgramCache]: Analyzing trace with hash 210561437, now seen corresponding path program 45 times [2021-06-05 05:15:05,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:05,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779414056] [2021-06-05 05:15:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:05,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779414056] [2021-06-05 05:15:05,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779414056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191111181] [2021-06-05 05:15:05,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:05,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:05,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:05,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:05,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:05,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 05:15:05,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:05,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:05,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:05,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 05:15:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:05,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191111181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:05,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:05,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:15:05,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675349243] [2021-06-05 05:15:05,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:15:05,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:15:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:15:05,474 INFO L87 Difference]: Start difference. First operand 3677 states and 15403 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:06,177 INFO L93 Difference]: Finished difference Result 4112 states and 17055 transitions. [2021-06-05 05:15:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:15:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:06,186 INFO L225 Difference]: With dead ends: 4112 [2021-06-05 05:15:06,186 INFO L226 Difference]: Without dead ends: 4103 [2021-06-05 05:15:06,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-06-05 05:15:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 3733. [2021-06-05 05:15:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 4.193461950696677) internal successors, (15650), 3732 states have internal predecessors, (15650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 15650 transitions. [2021-06-05 05:15:06,243 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 15650 transitions. Word has length 23 [2021-06-05 05:15:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:06,243 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 15650 transitions. [2021-06-05 05:15:06,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 15650 transitions. [2021-06-05 05:15:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:06,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:06,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:06,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:06,450 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1901867193, now seen corresponding path program 46 times [2021-06-05 05:15:06,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:06,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802087609] [2021-06-05 05:15:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:06,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802087609] [2021-06-05 05:15:06,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802087609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53911705] [2021-06-05 05:15:06,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:06,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:06,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 05:15:06,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:06,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:06,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:06,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 05:15:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53911705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:06,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:06,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:15:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136418949] [2021-06-05 05:15:06,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:15:06,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:15:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:15:06,810 INFO L87 Difference]: Start difference. First operand 3733 states and 15650 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,936 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 05:15:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:07,651 INFO L93 Difference]: Finished difference Result 4327 states and 17952 transitions. [2021-06-05 05:15:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:15:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:07,661 INFO L225 Difference]: With dead ends: 4327 [2021-06-05 05:15:07,661 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 05:15:07,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 712.3ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:15:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 05:15:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3739. [2021-06-05 05:15:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.193151417870519) internal successors, (15674), 3738 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 15674 transitions. [2021-06-05 05:15:07,721 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 15674 transitions. Word has length 23 [2021-06-05 05:15:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:07,721 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 15674 transitions. [2021-06-05 05:15:07,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 15674 transitions. [2021-06-05 05:15:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:07,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:07,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:07,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:07,927 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1064402683, now seen corresponding path program 47 times [2021-06-05 05:15:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:07,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712083632] [2021-06-05 05:15:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:08,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:08,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712083632] [2021-06-05 05:15:08,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712083632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:08,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914173041] [2021-06-05 05:15:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:08,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:08,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:08,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:08,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 05:15:08,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:08,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:08,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:08,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 05:15:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:08,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914173041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:08,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:08,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:15:08,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477179602] [2021-06-05 05:15:08,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:15:08,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:15:08,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:15:08,320 INFO L87 Difference]: Start difference. First operand 3739 states and 15674 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:08,453 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 05:15:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:09,264 INFO L93 Difference]: Finished difference Result 4413 states and 18287 transitions. [2021-06-05 05:15:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:09,274 INFO L225 Difference]: With dead ends: 4413 [2021-06-05 05:15:09,274 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 05:15:09,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 791.1ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 05:15:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3745. [2021-06-05 05:15:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3744 states have (on average 4.193910256410256) internal successors, (15702), 3744 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 15702 transitions. [2021-06-05 05:15:09,336 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 15702 transitions. Word has length 23 [2021-06-05 05:15:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:09,336 INFO L482 AbstractCegarLoop]: Abstraction has 3745 states and 15702 transitions. [2021-06-05 05:15:09,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 15702 transitions. [2021-06-05 05:15:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:09,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:09,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:09,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 05:15:09,543 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1652148005, now seen corresponding path program 48 times [2021-06-05 05:15:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:09,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054619816] [2021-06-05 05:15:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:09,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:09,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054619816] [2021-06-05 05:15:09,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054619816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:09,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073336562] [2021-06-05 05:15:09,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:09,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:09,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:09,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:15:09,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:09,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:09,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:15:09,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:09,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:09,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:09,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:26 [2021-06-05 05:15:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:09,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073336562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:09,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:09,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:15:09,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970926222] [2021-06-05 05:15:09,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:15:09,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:09,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:15:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:15:09,844 INFO L87 Difference]: Start difference. First operand 3745 states and 15702 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:10,465 INFO L93 Difference]: Finished difference Result 4073 states and 16946 transitions. [2021-06-05 05:15:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:15:10,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:10,474 INFO L225 Difference]: With dead ends: 4073 [2021-06-05 05:15:10,474 INFO L226 Difference]: Without dead ends: 4064 [2021-06-05 05:15:10,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2021-06-05 05:15:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 3751. [2021-06-05 05:15:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 4.1936) internal successors, (15726), 3750 states have internal predecessors, (15726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 15726 transitions. [2021-06-05 05:15:10,532 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 15726 transitions. Word has length 23 [2021-06-05 05:15:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:10,532 INFO L482 AbstractCegarLoop]: Abstraction has 3751 states and 15726 transitions. [2021-06-05 05:15:10,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 15726 transitions. [2021-06-05 05:15:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:10,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:10,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:10,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2021-06-05 05:15:10,738 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:10,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1567108135, now seen corresponding path program 49 times [2021-06-05 05:15:10,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:10,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648340830] [2021-06-05 05:15:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:10,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648340830] [2021-06-05 05:15:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648340830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787446009] [2021-06-05 05:15:10,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:11,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:11,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 05:15:11,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:11,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:11,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:11,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:31 [2021-06-05 05:15:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787446009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:11,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:11,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:15:11,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126134129] [2021-06-05 05:15:11,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:15:11,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:11,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:15:11,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:15:11,212 INFO L87 Difference]: Start difference. First operand 3751 states and 15726 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:11,543 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 05:15:12,220 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 05:15:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:12,456 INFO L93 Difference]: Finished difference Result 4206 states and 17475 transitions. [2021-06-05 05:15:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:15:12,457 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:12,465 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 05:15:12,466 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 05:15:12,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1172.5ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 05:15:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3759. [2021-06-05 05:15:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 4.193720063863758) internal successors, (15760), 3758 states have internal predecessors, (15760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 15760 transitions. [2021-06-05 05:15:12,546 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 15760 transitions. Word has length 23 [2021-06-05 05:15:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:12,546 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 15760 transitions. [2021-06-05 05:15:12,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 15760 transitions. [2021-06-05 05:15:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:12,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:12,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:12,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 05:15:12,753 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1525104667, now seen corresponding path program 50 times [2021-06-05 05:15:12,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:12,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353090976] [2021-06-05 05:15:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:12,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353090976] [2021-06-05 05:15:12,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353090976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363068828] [2021-06-05 05:15:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:12,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:12,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:12,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:12,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:12,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:12,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:13,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:13,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:13,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:13,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363068828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:13,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:13,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:13,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849978307] [2021-06-05 05:15:13,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:13,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:13,075 INFO L87 Difference]: Start difference. First operand 3759 states and 15760 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:14,222 INFO L93 Difference]: Finished difference Result 4690 states and 19442 transitions. [2021-06-05 05:15:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:14,233 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 05:15:14,233 INFO L226 Difference]: Without dead ends: 4666 [2021-06-05 05:15:14,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-06-05 05:15:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3783. [2021-06-05 05:15:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.195928080380751) internal successors, (15869), 3782 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15869 transitions. [2021-06-05 05:15:14,297 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15869 transitions. Word has length 23 [2021-06-05 05:15:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:14,297 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15869 transitions. [2021-06-05 05:15:14,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15869 transitions. [2021-06-05 05:15:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:14,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:14,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:14,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:14,504 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1863701669, now seen corresponding path program 51 times [2021-06-05 05:15:14,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:14,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107476437] [2021-06-05 05:15:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:14,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107476437] [2021-06-05 05:15:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107476437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98687732] [2021-06-05 05:15:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:14,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:15:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:14,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:14,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:14,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 05:15:14,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:14,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:14,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:14,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:15:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:14,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98687732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:14,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:14,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:14,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355722971] [2021-06-05 05:15:14,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:14,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:14,828 INFO L87 Difference]: Start difference. First operand 3783 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:15,451 INFO L93 Difference]: Finished difference Result 4448 states and 18449 transitions. [2021-06-05 05:15:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:15:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:15,461 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 05:15:15,461 INFO L226 Difference]: Without dead ends: 4420 [2021-06-05 05:15:15,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:15:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-06-05 05:15:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3789. [2021-06-05 05:15:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195617740232312) internal successors, (15893), 3788 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15893 transitions. [2021-06-05 05:15:15,522 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15893 transitions. Word has length 23 [2021-06-05 05:15:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:15,522 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15893 transitions. [2021-06-05 05:15:15,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15893 transitions. [2021-06-05 05:15:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:15,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:15,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:15,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:15,728 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1355554471, now seen corresponding path program 52 times [2021-06-05 05:15:15,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:15,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895824634] [2021-06-05 05:15:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:15,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895824634] [2021-06-05 05:15:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895824634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490755960] [2021-06-05 05:15:15,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:15,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:16,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:16,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:16,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:16,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:16,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:16,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490755960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:16,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:16,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:16,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796756789] [2021-06-05 05:15:16,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:16,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:16,109 INFO L87 Difference]: Start difference. First operand 3789 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:17,151 INFO L93 Difference]: Finished difference Result 4477 states and 18578 transitions. [2021-06-05 05:15:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:17,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:17,161 INFO L225 Difference]: With dead ends: 4477 [2021-06-05 05:15:17,161 INFO L226 Difference]: Without dead ends: 4454 [2021-06-05 05:15:17,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4454 states. [2021-06-05 05:15:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4454 to 3777. [2021-06-05 05:15:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.195444915254237) internal successors, (15842), 3776 states have internal predecessors, (15842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15842 transitions. [2021-06-05 05:15:17,220 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15842 transitions. Word has length 23 [2021-06-05 05:15:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:17,220 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15842 transitions. [2021-06-05 05:15:17,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15842 transitions. [2021-06-05 05:15:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:17,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:17,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:17,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:17,427 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1690313529, now seen corresponding path program 53 times [2021-06-05 05:15:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:17,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113598803] [2021-06-05 05:15:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:17,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113598803] [2021-06-05 05:15:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113598803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520217238] [2021-06-05 05:15:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:17,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:15:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:17,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:17,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:17,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:17,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:17,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:17,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:17,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520217238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:17,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:17,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:17,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987863295] [2021-06-05 05:15:17,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:17,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:17,757 INFO L87 Difference]: Start difference. First operand 3777 states and 15842 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:18,438 INFO L93 Difference]: Finished difference Result 4607 states and 19073 transitions. [2021-06-05 05:15:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:18,449 INFO L225 Difference]: With dead ends: 4607 [2021-06-05 05:15:18,449 INFO L226 Difference]: Without dead ends: 4576 [2021-06-05 05:15:18,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:15:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2021-06-05 05:15:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 3783. [2021-06-05 05:15:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.196192490745637) internal successors, (15870), 3782 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15870 transitions. [2021-06-05 05:15:18,514 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15870 transitions. Word has length 23 [2021-06-05 05:15:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:18,514 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15870 transitions. [2021-06-05 05:15:18,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15870 transitions. [2021-06-05 05:15:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:18,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:18,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:18,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:18,721 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1102568207, now seen corresponding path program 54 times [2021-06-05 05:15:18,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:18,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371999595] [2021-06-05 05:15:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:18,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:18,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371999595] [2021-06-05 05:15:18,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371999595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:18,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592026166] [2021-06-05 05:15:18,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:18,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:18,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:18,997 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:15:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 05:15:18,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:19,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 05:15:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592026166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:19,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404917817] [2021-06-05 05:15:19,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:19,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:19,102 INFO L87 Difference]: Start difference. First operand 3783 states and 15870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:20,007 INFO L93 Difference]: Finished difference Result 4287 states and 17822 transitions. [2021-06-05 05:15:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:15:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:20,017 INFO L225 Difference]: With dead ends: 4287 [2021-06-05 05:15:20,017 INFO L226 Difference]: Without dead ends: 4259 [2021-06-05 05:15:20,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:15:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-06-05 05:15:20,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3789. [2021-06-05 05:15:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195881731784583) internal successors, (15894), 3788 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15894 transitions. [2021-06-05 05:15:20,078 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15894 transitions. Word has length 23 [2021-06-05 05:15:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:20,078 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15894 transitions. [2021-06-05 05:15:20,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15894 transitions. [2021-06-05 05:15:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:20,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:20,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:20,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 05:15:20,289 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash -26857051, now seen corresponding path program 55 times [2021-06-05 05:15:20,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:20,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061111514] [2021-06-05 05:15:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:20,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:20,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061111514] [2021-06-05 05:15:20,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061111514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:20,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287219219] [2021-06-05 05:15:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:20,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:20,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:20,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:20,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:20,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:20,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:20,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:20,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:20,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287219219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:20,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:20,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:20,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107693177] [2021-06-05 05:15:20,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:20,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:20,619 INFO L87 Difference]: Start difference. First operand 3789 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:21,505 INFO L93 Difference]: Finished difference Result 4408 states and 18310 transitions. [2021-06-05 05:15:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:21,514 INFO L225 Difference]: With dead ends: 4408 [2021-06-05 05:15:21,514 INFO L226 Difference]: Without dead ends: 4385 [2021-06-05 05:15:21,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 793.9ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2021-06-05 05:15:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 3771. [2021-06-05 05:15:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 4.1938992042440315) internal successors, (15811), 3770 states have internal predecessors, (15811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 15811 transitions. [2021-06-05 05:15:21,571 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 15811 transitions. Word has length 23 [2021-06-05 05:15:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:21,571 INFO L482 AbstractCegarLoop]: Abstraction has 3771 states and 15811 transitions. [2021-06-05 05:15:21,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 15811 transitions. [2021-06-05 05:15:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:21,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:21,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:21,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:21,777 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:21,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1699183323, now seen corresponding path program 56 times [2021-06-05 05:15:21,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:21,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904949967] [2021-06-05 05:15:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:21,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:21,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904949967] [2021-06-05 05:15:21,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904949967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:21,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612564018] [2021-06-05 05:15:21,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:21,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:21,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:22,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:22,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:22,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:22,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:22,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612564018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:22,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:22,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36687276] [2021-06-05 05:15:22,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:22,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:22,104 INFO L87 Difference]: Start difference. First operand 3771 states and 15811 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:22,607 INFO L93 Difference]: Finished difference Result 4227 states and 17567 transitions. [2021-06-05 05:15:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:15:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:22,616 INFO L225 Difference]: With dead ends: 4227 [2021-06-05 05:15:22,616 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 05:15:22,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 05:15:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3777. [2021-06-05 05:15:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.193591101694915) internal successors, (15835), 3776 states have internal predecessors, (15835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15835 transitions. [2021-06-05 05:15:22,676 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15835 transitions. Word has length 23 [2021-06-05 05:15:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:22,676 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15835 transitions. [2021-06-05 05:15:22,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15835 transitions. [2021-06-05 05:15:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:22,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:22,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:22,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:22,892 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1267086553, now seen corresponding path program 57 times [2021-06-05 05:15:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:22,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630207115] [2021-06-05 05:15:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:22,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:22,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630207115] [2021-06-05 05:15:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630207115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395605506] [2021-06-05 05:15:22,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:23,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:15:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:23,175 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:15:23,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:15:23,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:23,197 INFO L628 ElimStorePlain]: treesize reduction 53, result has 20.9 percent of original size [2021-06-05 05:15:23,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:23,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:15:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:23,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395605506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:23,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:23,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:23,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195833347] [2021-06-05 05:15:23,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:23,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:23,241 INFO L87 Difference]: Start difference. First operand 3777 states and 15835 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:24,008 INFO L93 Difference]: Finished difference Result 4426 states and 18356 transitions. [2021-06-05 05:15:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:24,023 INFO L225 Difference]: With dead ends: 4426 [2021-06-05 05:15:24,024 INFO L226 Difference]: Without dead ends: 4395 [2021-06-05 05:15:24,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:15:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2021-06-05 05:15:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3783. [2021-06-05 05:15:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.194341618191433) internal successors, (15863), 3782 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15863 transitions. [2021-06-05 05:15:24,084 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15863 transitions. Word has length 23 [2021-06-05 05:15:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:24,084 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15863 transitions. [2021-06-05 05:15:24,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15863 transitions. [2021-06-05 05:15:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:24,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:24,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:24,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 05:15:24,291 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1854831875, now seen corresponding path program 58 times [2021-06-05 05:15:24,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:24,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292382032] [2021-06-05 05:15:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:24,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292382032] [2021-06-05 05:15:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292382032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260190644] [2021-06-05 05:15:24,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:24,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:24,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:24,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:24,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:24,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:24,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:24,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260190644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:24,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:24,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755832581] [2021-06-05 05:15:24,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:24,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:24,624 INFO L87 Difference]: Start difference. First operand 3783 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:25,300 INFO L93 Difference]: Finished difference Result 4228 states and 17591 transitions. [2021-06-05 05:15:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:15:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:25,308 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 05:15:25,308 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 05:15:25,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:15:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 05:15:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3789. [2021-06-05 05:15:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.194033790918691) internal successors, (15887), 3788 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15887 transitions. [2021-06-05 05:15:25,360 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15887 transitions. Word has length 23 [2021-06-05 05:15:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:25,360 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15887 transitions. [2021-06-05 05:15:25,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15887 transitions. [2021-06-05 05:15:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:25,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:25,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:25,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:25,566 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1364424265, now seen corresponding path program 59 times [2021-06-05 05:15:25,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:25,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920714400] [2021-06-05 05:15:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:25,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920714400] [2021-06-05 05:15:25,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920714400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803944904] [2021-06-05 05:15:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:25,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:15:25,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:25,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:25,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:25,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:25,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:25,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:25,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803944904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:25,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963818265] [2021-06-05 05:15:25,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:25,938 INFO L87 Difference]: Start difference. First operand 3789 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:26,752 INFO L93 Difference]: Finished difference Result 4302 states and 17890 transitions. [2021-06-05 05:15:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:15:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:26,761 INFO L225 Difference]: With dead ends: 4302 [2021-06-05 05:15:26,762 INFO L226 Difference]: Without dead ends: 4279 [2021-06-05 05:15:26,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:15:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-05 05:15:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3765. [2021-06-05 05:15:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 4.193411264612115) internal successors, (15784), 3764 states have internal predecessors, (15784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 15784 transitions. [2021-06-05 05:15:26,823 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 15784 transitions. Word has length 23 [2021-06-05 05:15:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:26,823 INFO L482 AbstractCegarLoop]: Abstraction has 3765 states and 15784 transitions. [2021-06-05 05:15:26,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 15784 transitions. [2021-06-05 05:15:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:26,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:26,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:27,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:27,030 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1496928921, now seen corresponding path program 60 times [2021-06-05 05:15:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:27,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950818916] [2021-06-05 05:15:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:27,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:27,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950818916] [2021-06-05 05:15:27,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950818916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803117476] [2021-06-05 05:15:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:27,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:27,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:27,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:27,301 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:15:27,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 05:15:27,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:27,320 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 05:15:27,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 05:15:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:27,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803117476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:27,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:27,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355609038] [2021-06-05 05:15:27,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:27,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:27,376 INFO L87 Difference]: Start difference. First operand 3765 states and 15784 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:28,319 INFO L93 Difference]: Finished difference Result 4660 states and 19308 transitions. [2021-06-05 05:15:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:15:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:28,328 INFO L225 Difference]: With dead ends: 4660 [2021-06-05 05:15:28,329 INFO L226 Difference]: Without dead ends: 4636 [2021-06-05 05:15:28,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-05 05:15:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3783. [2021-06-05 05:15:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.196192490745637) internal successors, (15870), 3782 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15870 transitions. [2021-06-05 05:15:28,389 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15870 transitions. Word has length 23 [2021-06-05 05:15:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:28,389 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15870 transitions. [2021-06-05 05:15:28,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15870 transitions. [2021-06-05 05:15:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:28,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:28,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:28,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2021-06-05 05:15:28,596 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash 590767961, now seen corresponding path program 61 times [2021-06-05 05:15:28,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:28,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022672566] [2021-06-05 05:15:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:28,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:28,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022672566] [2021-06-05 05:15:28,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022672566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:28,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715461787] [2021-06-05 05:15:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:28,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:28,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:28,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:28,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:28,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:28,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:28,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715461787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:28,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:28,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:28,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593116132] [2021-06-05 05:15:28,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:28,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:28,952 INFO L87 Difference]: Start difference. First operand 3783 states and 15870 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:29,733 INFO L93 Difference]: Finished difference Result 4546 states and 18846 transitions. [2021-06-05 05:15:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:29,741 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 05:15:29,742 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 05:15:29,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:15:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 05:15:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3789. [2021-06-05 05:15:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195881731784583) internal successors, (15894), 3788 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15894 transitions. [2021-06-05 05:15:29,792 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15894 transitions. Word has length 23 [2021-06-05 05:15:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:29,792 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15894 transitions. [2021-06-05 05:15:29,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15894 transitions. [2021-06-05 05:15:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:29,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:29,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:29,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:29,998 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1666479117, now seen corresponding path program 62 times [2021-06-05 05:15:29,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:29,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611481079] [2021-06-05 05:15:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:30,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:30,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611481079] [2021-06-05 05:15:30,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611481079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:30,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183845471] [2021-06-05 05:15:30,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:30,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:30,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:30,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:30,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:30,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:30,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:30,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:30,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183845471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:30,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:30,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:30,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276131458] [2021-06-05 05:15:30,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:30,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:30,319 INFO L87 Difference]: Start difference. First operand 3789 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:31,337 INFO L93 Difference]: Finished difference Result 4455 states and 18490 transitions. [2021-06-05 05:15:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:31,347 INFO L225 Difference]: With dead ends: 4455 [2021-06-05 05:15:31,347 INFO L226 Difference]: Without dead ends: 4432 [2021-06-05 05:15:31,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 798.4ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4432 states. [2021-06-05 05:15:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4432 to 3777. [2021-06-05 05:15:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.195709745762712) internal successors, (15843), 3776 states have internal predecessors, (15843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15843 transitions. [2021-06-05 05:15:31,405 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15843 transitions. Word has length 23 [2021-06-05 05:15:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:31,405 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15843 transitions. [2021-06-05 05:15:31,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15843 transitions. [2021-06-05 05:15:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:31,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:31,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:31,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 05:15:31,611 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1331720059, now seen corresponding path program 63 times [2021-06-05 05:15:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947734184] [2021-06-05 05:15:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:31,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947734184] [2021-06-05 05:15:31,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947734184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781296834] [2021-06-05 05:15:31,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:31,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:15:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:31,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:31,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:31,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:31,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781296834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:31,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652003463] [2021-06-05 05:15:31,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:31,943 INFO L87 Difference]: Start difference. First operand 3777 states and 15843 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:32,665 INFO L93 Difference]: Finished difference Result 4636 states and 19200 transitions. [2021-06-05 05:15:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:32,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:32,675 INFO L225 Difference]: With dead ends: 4636 [2021-06-05 05:15:32,675 INFO L226 Difference]: Without dead ends: 4605 [2021-06-05 05:15:32,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:15:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-05 05:15:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 3783. [2021-06-05 05:15:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.1964569011105235) internal successors, (15871), 3782 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15871 transitions. [2021-06-05 05:15:32,735 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15871 transitions. Word has length 23 [2021-06-05 05:15:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:32,735 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15871 transitions. [2021-06-05 05:15:32,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15871 transitions. [2021-06-05 05:15:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:32,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:32,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:32,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:32,941 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:32,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1919465381, now seen corresponding path program 64 times [2021-06-05 05:15:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:32,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277865225] [2021-06-05 05:15:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:33,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277865225] [2021-06-05 05:15:33,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277865225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010889050] [2021-06-05 05:15:33,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:33,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:33,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:33,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:33,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:33,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:33,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:33,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:33,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:33,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010889050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:33,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:33,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414544728] [2021-06-05 05:15:33,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:33,266 INFO L87 Difference]: Start difference. First operand 3783 states and 15871 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:34,061 INFO L93 Difference]: Finished difference Result 4407 states and 18305 transitions. [2021-06-05 05:15:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:34,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:34,070 INFO L225 Difference]: With dead ends: 4407 [2021-06-05 05:15:34,070 INFO L226 Difference]: Without dead ends: 4379 [2021-06-05 05:15:34,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:15:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-06-05 05:15:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3789. [2021-06-05 05:15:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.196145723336853) internal successors, (15895), 3788 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15895 transitions. [2021-06-05 05:15:34,126 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15895 transitions. Word has length 23 [2021-06-05 05:15:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:34,126 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15895 transitions. [2021-06-05 05:15:34,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15895 transitions. [2021-06-05 05:15:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:34,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:34,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:34,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 05:15:34,333 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1299790759, now seen corresponding path program 65 times [2021-06-05 05:15:34,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:34,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350592339] [2021-06-05 05:15:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:34,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350592339] [2021-06-05 05:15:34,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350592339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957124337] [2021-06-05 05:15:34,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:34,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:15:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:34,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:34,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:34,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957124337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:34,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:34,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608776714] [2021-06-05 05:15:34,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:34,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:34,655 INFO L87 Difference]: Start difference. First operand 3789 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:35,540 INFO L93 Difference]: Finished difference Result 4332 states and 18009 transitions. [2021-06-05 05:15:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:35,550 INFO L225 Difference]: With dead ends: 4332 [2021-06-05 05:15:35,550 INFO L226 Difference]: Without dead ends: 4309 [2021-06-05 05:15:35,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-06-05 05:15:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 3771. [2021-06-05 05:15:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 4.1941644562334215) internal successors, (15812), 3770 states have internal predecessors, (15812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 15812 transitions. [2021-06-05 05:15:35,613 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 15812 transitions. Word has length 23 [2021-06-05 05:15:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:35,613 INFO L482 AbstractCegarLoop]: Abstraction has 3771 states and 15812 transitions. [2021-06-05 05:15:35,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 15812 transitions. [2021-06-05 05:15:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:35,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:35,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:35,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:35,821 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -615499709, now seen corresponding path program 66 times [2021-06-05 05:15:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027567475] [2021-06-05 05:15:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:35,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:35,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027567475] [2021-06-05 05:15:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027567475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406705078] [2021-06-05 05:15:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:35,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:36,116 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 05:15:36,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 05:15:36,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,158 INFO L628 ElimStorePlain]: treesize reduction 82, result has 14.6 percent of original size [2021-06-05 05:15:36,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:14 [2021-06-05 05:15:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:36,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406705078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:36,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:36,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:36,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581021447] [2021-06-05 05:15:36,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:36,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:36,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:36,203 INFO L87 Difference]: Start difference. First operand 3771 states and 15812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:37,215 INFO L93 Difference]: Finished difference Result 4648 states and 19256 transitions. [2021-06-05 05:15:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:15:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:37,225 INFO L225 Difference]: With dead ends: 4648 [2021-06-05 05:15:37,225 INFO L226 Difference]: Without dead ends: 4624 [2021-06-05 05:15:37,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-06-05 05:15:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 3783. [2021-06-05 05:15:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.194341618191433) internal successors, (15863), 3782 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15863 transitions. [2021-06-05 05:15:37,288 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15863 transitions. Word has length 23 [2021-06-05 05:15:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:37,288 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15863 transitions. [2021-06-05 05:15:37,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15863 transitions. [2021-06-05 05:15:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:37,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:37,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:37,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 05:15:37,495 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1521660669, now seen corresponding path program 67 times [2021-06-05 05:15:37,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:37,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62062359] [2021-06-05 05:15:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:37,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:37,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62062359] [2021-06-05 05:15:37,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62062359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:37,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306557977] [2021-06-05 05:15:37,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:37,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:37,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:37,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:37,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:37,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:37,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306557977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:37,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:37,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:37,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10562666] [2021-06-05 05:15:37,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:37,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:37,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:37,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:37,830 INFO L87 Difference]: Start difference. First operand 3783 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:38,619 INFO L93 Difference]: Finished difference Result 4458 states and 18490 transitions. [2021-06-05 05:15:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:38,651 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 05:15:38,652 INFO L226 Difference]: Without dead ends: 4430 [2021-06-05 05:15:38,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-06-05 05:15:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3789. [2021-06-05 05:15:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.194033790918691) internal successors, (15887), 3788 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15887 transitions. [2021-06-05 05:15:38,701 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15887 transitions. Word has length 23 [2021-06-05 05:15:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:38,701 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15887 transitions. [2021-06-05 05:15:38,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15887 transitions. [2021-06-05 05:15:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:38,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:38,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:38,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 05:15:38,909 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash -445949513, now seen corresponding path program 68 times [2021-06-05 05:15:38,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:38,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544035949] [2021-06-05 05:15:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:39,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:39,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544035949] [2021-06-05 05:15:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544035949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:39,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865997192] [2021-06-05 05:15:39,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:39,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:39,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:39,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:39,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:39,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:39,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:39,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:39,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865997192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:39,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:39,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:39,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488924708] [2021-06-05 05:15:39,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:39,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:39,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:39,255 INFO L87 Difference]: Start difference. First operand 3789 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:40,042 INFO L93 Difference]: Finished difference Result 4328 states and 17986 transitions. [2021-06-05 05:15:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:40,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:40,051 INFO L225 Difference]: With dead ends: 4328 [2021-06-05 05:15:40,051 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 05:15:40,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:15:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 05:15:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3777. [2021-06-05 05:15:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.19385593220339) internal successors, (15836), 3776 states have internal predecessors, (15836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15836 transitions. [2021-06-05 05:15:40,111 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15836 transitions. Word has length 23 [2021-06-05 05:15:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:40,111 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15836 transitions. [2021-06-05 05:15:40,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15836 transitions. [2021-06-05 05:15:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:40,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:40,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:40,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 05:15:40,317 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1944197129, now seen corresponding path program 69 times [2021-06-05 05:15:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:40,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651934334] [2021-06-05 05:15:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:40,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651934334] [2021-06-05 05:15:40,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651934334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204237541] [2021-06-05 05:15:40,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:40,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:40,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:40,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:40,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:40,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:40,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204237541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:40,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:40,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:40,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508469209] [2021-06-05 05:15:40,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:40,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:40,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:40,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:40,667 INFO L87 Difference]: Start difference. First operand 3777 states and 15836 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:41,236 INFO L93 Difference]: Finished difference Result 4278 states and 17803 transitions. [2021-06-05 05:15:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:15:41,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:41,246 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 05:15:41,246 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 05:15:41,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 05:15:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3781. [2021-06-05 05:15:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3780 states have (on average 4.193650793650794) internal successors, (15852), 3780 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 15852 transitions. [2021-06-05 05:15:41,306 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 15852 transitions. Word has length 23 [2021-06-05 05:15:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:41,306 INFO L482 AbstractCegarLoop]: Abstraction has 3781 states and 15852 transitions. [2021-06-05 05:15:41,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 15852 transitions. [2021-06-05 05:15:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:41,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:41,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:41,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 05:15:41,512 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:41,512 INFO L82 PathProgramCache]: Analyzing trace with hash 403052635, now seen corresponding path program 98 times [2021-06-05 05:15:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:41,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462149296] [2021-06-05 05:15:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:41,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:41,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462149296] [2021-06-05 05:15:41,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462149296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983429988] [2021-06-05 05:15:41,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:41,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:41,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:41,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:41,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:41,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:41,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:41,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983429988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:41,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:41,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166417037] [2021-06-05 05:15:41,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:41,911 INFO L87 Difference]: Start difference. First operand 3781 states and 15852 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:42,354 INFO L93 Difference]: Finished difference Result 4001 states and 16695 transitions. [2021-06-05 05:15:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:15:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:42,362 INFO L225 Difference]: With dead ends: 4001 [2021-06-05 05:15:42,362 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 05:15:42,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 05:15:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3787. [2021-06-05 05:15:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.194136291600634) internal successors, (15879), 3786 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15879 transitions. [2021-06-05 05:15:42,420 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15879 transitions. Word has length 23 [2021-06-05 05:15:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:42,420 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15879 transitions. [2021-06-05 05:15:42,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15879 transitions. [2021-06-05 05:15:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:42,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:42,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:42,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:42,627 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash 268264731, now seen corresponding path program 99 times [2021-06-05 05:15:42,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:42,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958849158] [2021-06-05 05:15:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958849158] [2021-06-05 05:15:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958849158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903407208] [2021-06-05 05:15:42,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:42,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:15:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:42,902 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:15:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:15:42,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:42,931 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 05:15:42,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:42,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:15:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:42,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903407208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:42,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:42,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269112986] [2021-06-05 05:15:42,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:42,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:42,975 INFO L87 Difference]: Start difference. First operand 3787 states and 15879 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:43,526 INFO L93 Difference]: Finished difference Result 4188 states and 17441 transitions. [2021-06-05 05:15:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:43,535 INFO L225 Difference]: With dead ends: 4188 [2021-06-05 05:15:43,535 INFO L226 Difference]: Without dead ends: 4173 [2021-06-05 05:15:43,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2021-06-05 05:15:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 3795. [2021-06-05 05:15:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.194254085397997) internal successors, (15913), 3794 states have internal predecessors, (15913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15913 transitions. [2021-06-05 05:15:43,592 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15913 transitions. Word has length 23 [2021-06-05 05:15:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:43,592 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15913 transitions. [2021-06-05 05:15:43,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15913 transitions. [2021-06-05 05:15:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:43,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:43,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:43,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,799 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash 853598683, now seen corresponding path program 100 times [2021-06-05 05:15:43,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:43,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103108846] [2021-06-05 05:15:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:43,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103108846] [2021-06-05 05:15:43,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103108846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067132291] [2021-06-05 05:15:43,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:43,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:43,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:44,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:44,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:44,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:44,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:44,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:44,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:44,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067132291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:44,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:44,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:44,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516692442] [2021-06-05 05:15:44,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:44,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:44,130 INFO L87 Difference]: Start difference. First operand 3795 states and 15913 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:44,881 INFO L93 Difference]: Finished difference Result 4042 states and 16845 transitions. [2021-06-05 05:15:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:15:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:44,890 INFO L225 Difference]: With dead ends: 4042 [2021-06-05 05:15:44,890 INFO L226 Difference]: Without dead ends: 4020 [2021-06-05 05:15:44,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2021-06-05 05:15:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3799. [2021-06-05 05:15:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 4.194049499736703) internal successors, (15929), 3798 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 15929 transitions. [2021-06-05 05:15:44,948 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 15929 transitions. Word has length 23 [2021-06-05 05:15:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:44,948 INFO L482 AbstractCegarLoop]: Abstraction has 3799 states and 15929 transitions. [2021-06-05 05:15:44,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 15929 transitions. [2021-06-05 05:15:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:44,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:44,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:45,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 05:15:45,190 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1827801879, now seen corresponding path program 101 times [2021-06-05 05:15:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:45,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225543129] [2021-06-05 05:15:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:45,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:45,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225543129] [2021-06-05 05:15:45,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225543129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:45,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109330805] [2021-06-05 05:15:45,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:45,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:45,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:45,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:45,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:45,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 05:15:45,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:45,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:45,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:45,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 05:15:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:45,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109330805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:45,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:45,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:45,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6330014] [2021-06-05 05:15:45,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:45,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:45,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:45,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:45,515 INFO L87 Difference]: Start difference. First operand 3799 states and 15929 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:46,306 INFO L93 Difference]: Finished difference Result 4089 states and 17043 transitions. [2021-06-05 05:15:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:15:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:46,315 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 05:15:46,316 INFO L226 Difference]: Without dead ends: 4074 [2021-06-05 05:15:46,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 565.0ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:15:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2021-06-05 05:15:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 3791. [2021-06-05 05:15:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.193931398416886) internal successors, (15895), 3790 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15895 transitions. [2021-06-05 05:15:46,374 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15895 transitions. Word has length 23 [2021-06-05 05:15:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:46,374 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15895 transitions. [2021-06-05 05:15:46,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15895 transitions. [2021-06-05 05:15:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:46,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:46,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:46,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:46,582 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 422702249, now seen corresponding path program 102 times [2021-06-05 05:15:46,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:46,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536999636] [2021-06-05 05:15:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:46,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536999636] [2021-06-05 05:15:46,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536999636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330437043] [2021-06-05 05:15:46,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:46,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:46,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:46,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:46,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:46,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:46,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:46,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:46,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330437043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:46,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:46,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078662188] [2021-06-05 05:15:46,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:46,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:46,942 INFO L87 Difference]: Start difference. First operand 3791 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:47,484 INFO L93 Difference]: Finished difference Result 3985 states and 16631 transitions. [2021-06-05 05:15:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:15:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:47,492 INFO L225 Difference]: With dead ends: 3985 [2021-06-05 05:15:47,492 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 05:15:47,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:15:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 05:15:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3783. [2021-06-05 05:15:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 05:15:47,545 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 05:15:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:47,546 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 05:15:47,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 05:15:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:47,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:47,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:47,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-05 05:15:47,754 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1086638551, now seen corresponding path program 103 times [2021-06-05 05:15:47,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:47,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042918951] [2021-06-05 05:15:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:47,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:47,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042918951] [2021-06-05 05:15:47,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042918951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:47,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671855905] [2021-06-05 05:15:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:48,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:48,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:48,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:48,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671855905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:48,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312972330] [2021-06-05 05:15:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:48,162 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:48,752 INFO L93 Difference]: Finished difference Result 4021 states and 16775 transitions. [2021-06-05 05:15:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:15:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:48,759 INFO L225 Difference]: With dead ends: 4021 [2021-06-05 05:15:48,760 INFO L226 Difference]: Without dead ends: 4006 [2021-06-05 05:15:48,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 559.4ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-06-05 05:15:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 3787. [2021-06-05 05:15:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.194136291600634) internal successors, (15879), 3786 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15879 transitions. [2021-06-05 05:15:48,806 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15879 transitions. Word has length 23 [2021-06-05 05:15:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:48,806 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15879 transitions. [2021-06-05 05:15:48,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15879 transitions. [2021-06-05 05:15:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:48,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:48,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:49,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:49,012 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash 664704283, now seen corresponding path program 104 times [2021-06-05 05:15:49,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:49,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589474290] [2021-06-05 05:15:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:49,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589474290] [2021-06-05 05:15:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589474290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:49,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239141527] [2021-06-05 05:15:49,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:49,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:49,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:49,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:49,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:49,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:49,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:49,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239141527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:49,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:49,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:49,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595660070] [2021-06-05 05:15:49,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:49,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:49,381 INFO L87 Difference]: Start difference. First operand 3787 states and 15879 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:50,014 INFO L93 Difference]: Finished difference Result 4068 states and 16967 transitions. [2021-06-05 05:15:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:15:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:50,023 INFO L225 Difference]: With dead ends: 4068 [2021-06-05 05:15:50,023 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 05:15:50,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:15:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 05:15:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3795. [2021-06-05 05:15:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.194254085397997) internal successors, (15913), 3794 states have internal predecessors, (15913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15913 transitions. [2021-06-05 05:15:50,081 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15913 transitions. Word has length 23 [2021-06-05 05:15:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:50,081 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15913 transitions. [2021-06-05 05:15:50,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15913 transitions. [2021-06-05 05:15:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:50,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:50,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:50,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 05:15:50,289 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash -241456677, now seen corresponding path program 105 times [2021-06-05 05:15:50,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:50,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878529731] [2021-06-05 05:15:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:50,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878529731] [2021-06-05 05:15:50,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878529731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066055877] [2021-06-05 05:15:50,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:50,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:50,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:50,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:15:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:50,571 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:15:50,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:15:50,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:50,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:50,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:50,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 05:15:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:50,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066055877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:50,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:50,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:50,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810047397] [2021-06-05 05:15:50,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:50,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:50,686 INFO L87 Difference]: Start difference. First operand 3795 states and 15913 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:51,393 INFO L93 Difference]: Finished difference Result 4160 states and 17326 transitions. [2021-06-05 05:15:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:51,402 INFO L225 Difference]: With dead ends: 4160 [2021-06-05 05:15:51,402 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 05:15:51,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 05:15:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3799. [2021-06-05 05:15:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 4.194049499736703) internal successors, (15929), 3798 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 15929 transitions. [2021-06-05 05:15:51,456 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 15929 transitions. Word has length 23 [2021-06-05 05:15:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:51,456 INFO L482 AbstractCegarLoop]: Abstraction has 3799 states and 15929 transitions. [2021-06-05 05:15:51,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 15929 transitions. [2021-06-05 05:15:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:51,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:51,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:51,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 05:15:51,665 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 834254479, now seen corresponding path program 106 times [2021-06-05 05:15:51,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:51,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107014288] [2021-06-05 05:15:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:51,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:51,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107014288] [2021-06-05 05:15:51,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107014288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:51,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134673282] [2021-06-05 05:15:51,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:51,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:51,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:51,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:51,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:51,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:51,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:51,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:52,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134673282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:52,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:52,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:52,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475457846] [2021-06-05 05:15:52,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:52,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:52,031 INFO L87 Difference]: Start difference. First operand 3799 states and 15929 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:52,720 INFO L93 Difference]: Finished difference Result 3994 states and 16671 transitions. [2021-06-05 05:15:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:15:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:52,729 INFO L225 Difference]: With dead ends: 3994 [2021-06-05 05:15:52,729 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 05:15:52,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:15:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 05:15:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3791. [2021-06-05 05:15:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.193931398416886) internal successors, (15895), 3790 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15895 transitions. [2021-06-05 05:15:52,784 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15895 transitions. Word has length 23 [2021-06-05 05:15:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:52,784 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15895 transitions. [2021-06-05 05:15:52,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15895 transitions. [2021-06-05 05:15:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:52,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:52,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:52,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 05:15:52,991 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -663993137, now seen corresponding path program 107 times [2021-06-05 05:15:52,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:52,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051241175] [2021-06-05 05:15:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:53,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:53,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051241175] [2021-06-05 05:15:53,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051241175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:53,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794290529] [2021-06-05 05:15:53,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:53,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:53,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:53,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:53,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:53,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:53,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:53,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:53,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794290529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:53,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:53,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662187997] [2021-06-05 05:15:53,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:53,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:53,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:53,326 INFO L87 Difference]: Start difference. First operand 3791 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:53,768 INFO L93 Difference]: Finished difference Result 4023 states and 16783 transitions. [2021-06-05 05:15:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:15:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:53,777 INFO L225 Difference]: With dead ends: 4023 [2021-06-05 05:15:53,777 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 05:15:53,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 05:15:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3783. [2021-06-05 05:15:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 05:15:53,834 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 05:15:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:53,834 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 05:15:53,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 05:15:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:53,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:53,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:54,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:54,041 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1209919013, now seen corresponding path program 108 times [2021-06-05 05:15:54,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:54,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027601511] [2021-06-05 05:15:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:54,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:54,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027601511] [2021-06-05 05:15:54,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027601511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:54,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204838287] [2021-06-05 05:15:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:54,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:54,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:54,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:54,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:54,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:15:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:54,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204838287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:54,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:54,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:54,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116603397] [2021-06-05 05:15:54,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:54,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:54,368 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:55,008 INFO L93 Difference]: Finished difference Result 4048 states and 16879 transitions. [2021-06-05 05:15:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:15:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:55,017 INFO L225 Difference]: With dead ends: 4048 [2021-06-05 05:15:55,017 INFO L226 Difference]: Without dead ends: 4033 [2021-06-05 05:15:55,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:15:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-06-05 05:15:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 3791. [2021-06-05 05:15:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.1941952506596305) internal successors, (15896), 3790 states have internal predecessors, (15896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15896 transitions. [2021-06-05 05:15:55,072 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15896 transitions. Word has length 23 [2021-06-05 05:15:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:55,072 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15896 transitions. [2021-06-05 05:15:55,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15896 transitions. [2021-06-05 05:15:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:55,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:55,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:55,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 05:15:55,278 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:55,278 INFO L82 PathProgramCache]: Analyzing trace with hash -624585061, now seen corresponding path program 109 times [2021-06-05 05:15:55,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:55,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040928227] [2021-06-05 05:15:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:55,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:55,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040928227] [2021-06-05 05:15:55,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040928227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482755788] [2021-06-05 05:15:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:55,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:55,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:55,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:55,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:55,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482755788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:55,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735929965] [2021-06-05 05:15:55,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:55,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:55,604 INFO L87 Difference]: Start difference. First operand 3791 states and 15896 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:56,282 INFO L93 Difference]: Finished difference Result 3982 states and 16610 transitions. [2021-06-05 05:15:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:56,290 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 05:15:56,290 INFO L226 Difference]: Without dead ends: 3960 [2021-06-05 05:15:56,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:15:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2021-06-05 05:15:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3795. [2021-06-05 05:15:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.193990511333685) internal successors, (15912), 3794 states have internal predecessors, (15912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15912 transitions. [2021-06-05 05:15:56,345 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15912 transitions. Word has length 23 [2021-06-05 05:15:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:56,345 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15912 transitions. [2021-06-05 05:15:56,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15912 transitions. [2021-06-05 05:15:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:56,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:56,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:56,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 05:15:56,551 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash 988981673, now seen corresponding path program 110 times [2021-06-05 05:15:56,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:56,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624252998] [2021-06-05 05:15:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:56,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:56,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624252998] [2021-06-05 05:15:56,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624252998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:56,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635098698] [2021-06-05 05:15:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:56,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:15:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:56,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 05:15:56,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:56,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:56,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:56,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 05:15:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:56,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635098698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:56,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:56,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:15:56,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222612342] [2021-06-05 05:15:56,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:15:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:15:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:15:56,859 INFO L87 Difference]: Start difference. First operand 3795 states and 15912 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:57,327 INFO L93 Difference]: Finished difference Result 3968 states and 16563 transitions. [2021-06-05 05:15:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:15:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:57,336 INFO L225 Difference]: With dead ends: 3968 [2021-06-05 05:15:57,336 INFO L226 Difference]: Without dead ends: 3953 [2021-06-05 05:15:57,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-06-05 05:15:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3787. [2021-06-05 05:15:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.193872160591654) internal successors, (15878), 3786 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15878 transitions. [2021-06-05 05:15:57,394 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15878 transitions. Word has length 23 [2021-06-05 05:15:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:57,394 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15878 transitions. [2021-06-05 05:15:57,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15878 transitions. [2021-06-05 05:15:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:57,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:57,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:57,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:57,601 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1437140393, now seen corresponding path program 111 times [2021-06-05 05:15:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799686317] [2021-06-05 05:15:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:57,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:57,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799686317] [2021-06-05 05:15:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799686317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:57,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723870894] [2021-06-05 05:15:57,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:57,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:57,879 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:15:57,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:15:57,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:57,907 INFO L628 ElimStorePlain]: treesize reduction 55, result has 20.3 percent of original size [2021-06-05 05:15:57,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:57,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:15:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:57,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723870894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:57,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:57,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:15:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353850601] [2021-06-05 05:15:57,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:57,952 INFO L87 Difference]: Start difference. First operand 3787 states and 15878 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:58,674 INFO L93 Difference]: Finished difference Result 4341 states and 18059 transitions. [2021-06-05 05:15:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:15:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:58,683 INFO L225 Difference]: With dead ends: 4341 [2021-06-05 05:15:58,683 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 05:15:58,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 05:15:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3791. [2021-06-05 05:15:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.1941952506596305) internal successors, (15896), 3790 states have internal predecessors, (15896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15896 transitions. [2021-06-05 05:15:58,743 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15896 transitions. Word has length 23 [2021-06-05 05:15:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:58,743 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15896 transitions. [2021-06-05 05:15:58,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15896 transitions. [2021-06-05 05:15:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:15:58,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:58,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:58,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 05:15:58,950 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -923613541, now seen corresponding path program 112 times [2021-06-05 05:15:58,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:58,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786218362] [2021-06-05 05:15:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:59,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786218362] [2021-06-05 05:15:59,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786218362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330835015] [2021-06-05 05:15:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:59,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:59,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:59,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:59,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:15:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330835015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:59,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:15:59,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231100864] [2021-06-05 05:15:59,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:59,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:59,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:59,315 INFO L87 Difference]: Start difference. First operand 3791 states and 15896 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:00,009 INFO L93 Difference]: Finished difference Result 4028 states and 16799 transitions. [2021-06-05 05:16:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:16:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:00,017 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 05:16:00,018 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 05:16:00,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:16:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 05:16:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3795. [2021-06-05 05:16:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.193990511333685) internal successors, (15912), 3794 states have internal predecessors, (15912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15912 transitions. [2021-06-05 05:16:00,071 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15912 transitions. Word has length 23 [2021-06-05 05:16:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:00,071 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15912 transitions. [2021-06-05 05:16:00,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15912 transitions. [2021-06-05 05:16:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:00,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:00,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:00,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 05:16:00,278 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:00,278 INFO L82 PathProgramCache]: Analyzing trace with hash 152097615, now seen corresponding path program 113 times [2021-06-05 05:16:00,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:00,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895627023] [2021-06-05 05:16:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:00,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895627023] [2021-06-05 05:16:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895627023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424107799] [2021-06-05 05:16:00,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:00,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:00,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:00,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:00,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:00,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:00,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:00,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:00,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:00,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:00,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424107799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:00,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:00,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:00,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277976787] [2021-06-05 05:16:00,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:00,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:00,617 INFO L87 Difference]: Start difference. First operand 3795 states and 15912 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:01,391 INFO L93 Difference]: Finished difference Result 4007 states and 16723 transitions. [2021-06-05 05:16:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:16:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:01,399 INFO L225 Difference]: With dead ends: 4007 [2021-06-05 05:16:01,399 INFO L226 Difference]: Without dead ends: 3992 [2021-06-05 05:16:01,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:16:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-06-05 05:16:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3787. [2021-06-05 05:16:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.193872160591654) internal successors, (15878), 3786 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15878 transitions. [2021-06-05 05:16:01,477 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15878 transitions. Word has length 23 [2021-06-05 05:16:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:01,477 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15878 transitions. [2021-06-05 05:16:01,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15878 transitions. [2021-06-05 05:16:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:01,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:01,483 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:01,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 05:16:01,683 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 433093467, now seen corresponding path program 114 times [2021-06-05 05:16:01,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:01,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083479028] [2021-06-05 05:16:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:01,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:01,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083479028] [2021-06-05 05:16:01,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083479028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:01,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017384967] [2021-06-05 05:16:01,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:01,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:16:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:01,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:01,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:01,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 05:16:01,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:01,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:01,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:01,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 05:16:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:02,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017384967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:02,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:02,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:02,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913665857] [2021-06-05 05:16:02,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:02,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:02,022 INFO L87 Difference]: Start difference. First operand 3787 states and 15878 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:02,465 INFO L93 Difference]: Finished difference Result 3993 states and 16666 transitions. [2021-06-05 05:16:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:16:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:02,473 INFO L225 Difference]: With dead ends: 3993 [2021-06-05 05:16:02,473 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 05:16:02,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 05:16:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3796. [2021-06-05 05:16:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.19235836627141) internal successors, (15910), 3795 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15910 transitions. [2021-06-05 05:16:02,526 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15910 transitions. Word has length 23 [2021-06-05 05:16:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:02,526 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15910 transitions. [2021-06-05 05:16:02,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15910 transitions. [2021-06-05 05:16:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:02,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:02,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:02,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 05:16:02,732 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash -608482601, now seen corresponding path program 115 times [2021-06-05 05:16:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:02,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393361563] [2021-06-05 05:16:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:02,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:02,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393361563] [2021-06-05 05:16:02,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393361563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:02,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010551864] [2021-06-05 05:16:02,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:02,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:02,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:02,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:02,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:02,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:02,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:03,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010551864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:03,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:03,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644341821] [2021-06-05 05:16:03,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:03,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:03,083 INFO L87 Difference]: Start difference. First operand 3796 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:03,657 INFO L93 Difference]: Finished difference Result 4008 states and 16725 transitions. [2021-06-05 05:16:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:16:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:03,665 INFO L225 Difference]: With dead ends: 4008 [2021-06-05 05:16:03,666 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 05:16:03,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 05:16:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3789. [2021-06-05 05:16:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.193769799366421) internal successors, (15886), 3788 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15886 transitions. [2021-06-05 05:16:03,721 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15886 transitions. Word has length 23 [2021-06-05 05:16:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:03,721 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15886 transitions. [2021-06-05 05:16:03,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15886 transitions. [2021-06-05 05:16:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:03,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:03,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:03,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:03,927 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash -895603953, now seen corresponding path program 116 times [2021-06-05 05:16:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:03,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115380952] [2021-06-05 05:16:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:04,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115380952] [2021-06-05 05:16:04,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115380952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453162691] [2021-06-05 05:16:04,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:04,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:04,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:04,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:04,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:04,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:04,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453162691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:04,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:04,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13267711] [2021-06-05 05:16:04,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:04,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:04,276 INFO L87 Difference]: Start difference. First operand 3789 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:04,978 INFO L93 Difference]: Finished difference Result 3948 states and 16476 transitions. [2021-06-05 05:16:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:16:04,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:04,987 INFO L225 Difference]: With dead ends: 3948 [2021-06-05 05:16:04,987 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 05:16:04,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:16:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 05:16:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3793. [2021-06-05 05:16:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193565400843882) internal successors, (15902), 3792 states have internal predecessors, (15902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15902 transitions. [2021-06-05 05:16:05,042 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15902 transitions. Word has length 23 [2021-06-05 05:16:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:05,042 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15902 transitions. [2021-06-05 05:16:05,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15902 transitions. [2021-06-05 05:16:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:05,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:05,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:05,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:05,248 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1388821339, now seen corresponding path program 117 times [2021-06-05 05:16:05,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:05,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022692871] [2021-06-05 05:16:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022692871] [2021-06-05 05:16:05,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022692871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199589680] [2021-06-05 05:16:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:05,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:16:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:05,524 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 05:16:05,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 59 [2021-06-05 05:16:05,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:05,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:05,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:05,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:351 [2021-06-05 05:16:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:05,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199589680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:05,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:05,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:16:05,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220751669] [2021-06-05 05:16:05,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:05,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:05,831 INFO L87 Difference]: Start difference. First operand 3793 states and 15902 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:06,348 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2021-06-05 05:16:06,660 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 05:16:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:07,359 INFO L93 Difference]: Finished difference Result 4313 states and 17944 transitions. [2021-06-05 05:16:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:07,368 INFO L225 Difference]: With dead ends: 4313 [2021-06-05 05:16:07,368 INFO L226 Difference]: Without dead ends: 4298 [2021-06-05 05:16:07,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1449.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:16:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-06-05 05:16:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3789. [2021-06-05 05:16:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.193769799366421) internal successors, (15886), 3788 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15886 transitions. [2021-06-05 05:16:07,423 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15886 transitions. Word has length 23 [2021-06-05 05:16:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:07,423 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15886 transitions. [2021-06-05 05:16:07,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15886 transitions. [2021-06-05 05:16:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:07,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:07,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:07,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:07,629 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash -454045083, now seen corresponding path program 118 times [2021-06-05 05:16:07,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:07,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105708577] [2021-06-05 05:16:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:07,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105708577] [2021-06-05 05:16:07,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105708577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174570152] [2021-06-05 05:16:07,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:07,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:07,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:07,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:07,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:08,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174570152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:08,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:08,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:08,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354576303] [2021-06-05 05:16:08,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:08,030 INFO L87 Difference]: Start difference. First operand 3789 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:08,701 INFO L93 Difference]: Finished difference Result 3962 states and 16538 transitions. [2021-06-05 05:16:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:16:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:08,710 INFO L225 Difference]: With dead ends: 3962 [2021-06-05 05:16:08,710 INFO L226 Difference]: Without dead ends: 3941 [2021-06-05 05:16:08,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 708.5ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:16:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-06-05 05:16:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3793. [2021-06-05 05:16:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193565400843882) internal successors, (15902), 3792 states have internal predecessors, (15902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15902 transitions. [2021-06-05 05:16:08,763 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15902 transitions. Word has length 23 [2021-06-05 05:16:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:08,764 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15902 transitions. [2021-06-05 05:16:08,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15902 transitions. [2021-06-05 05:16:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:08,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:08,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:08,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:08,970 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1466737615, now seen corresponding path program 119 times [2021-06-05 05:16:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:08,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518658895] [2021-06-05 05:16:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:09,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518658895] [2021-06-05 05:16:09,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518658895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582979558] [2021-06-05 05:16:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:09,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:16:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:09,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:09,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:09,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:09,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:09,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:09,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582979558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:09,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:09,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:09,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534020287] [2021-06-05 05:16:09,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:09,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:09,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:09,330 INFO L87 Difference]: Start difference. First operand 3793 states and 15902 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:10,086 INFO L93 Difference]: Finished difference Result 3954 states and 16513 transitions. [2021-06-05 05:16:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:16:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:10,095 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 05:16:10,095 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 05:16:10,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 733.5ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:16:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 05:16:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3785. [2021-06-05 05:16:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 4.193710359408033) internal successors, (15869), 3784 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 15869 transitions. [2021-06-05 05:16:10,152 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 15869 transitions. Word has length 23 [2021-06-05 05:16:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:10,152 INFO L482 AbstractCegarLoop]: Abstraction has 3785 states and 15869 transitions. [2021-06-05 05:16:10,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 15869 transitions. [2021-06-05 05:16:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:10,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:10,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:10,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,359 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1812114575, now seen corresponding path program 120 times [2021-06-05 05:16:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:10,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899641423] [2021-06-05 05:16:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899641423] [2021-06-05 05:16:10,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899641423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015519743] [2021-06-05 05:16:10,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:10,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:10,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:10,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015519743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:10,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:10,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146780742] [2021-06-05 05:16:10,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:10,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:10,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:10,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:10,676 INFO L87 Difference]: Start difference. First operand 3785 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:11,335 INFO L93 Difference]: Finished difference Result 4034 states and 16823 transitions. [2021-06-05 05:16:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:16:11,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:11,344 INFO L225 Difference]: With dead ends: 4034 [2021-06-05 05:16:11,344 INFO L226 Difference]: Without dead ends: 4019 [2021-06-05 05:16:11,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-06-05 05:16:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 3793. [2021-06-05 05:16:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193829113924051) internal successors, (15903), 3792 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15903 transitions. [2021-06-05 05:16:11,400 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15903 transitions. Word has length 23 [2021-06-05 05:16:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:11,400 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15903 transitions. [2021-06-05 05:16:11,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15903 transitions. [2021-06-05 05:16:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:11,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:11,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:11,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 05:16:11,606 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1897518769, now seen corresponding path program 121 times [2021-06-05 05:16:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:11,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115978841] [2021-06-05 05:16:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:11,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:11,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115978841] [2021-06-05 05:16:11,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115978841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:11,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083896970] [2021-06-05 05:16:11,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:11,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:11,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:11,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:11,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:11,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:11,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083896970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:11,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:11,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146630483] [2021-06-05 05:16:11,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:11,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:11,967 INFO L87 Difference]: Start difference. First operand 3793 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:12,669 INFO L93 Difference]: Finished difference Result 3979 states and 16600 transitions. [2021-06-05 05:16:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:16:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:12,677 INFO L225 Difference]: With dead ends: 3979 [2021-06-05 05:16:12,677 INFO L226 Difference]: Without dead ends: 3957 [2021-06-05 05:16:12,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:16:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-06-05 05:16:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3797. [2021-06-05 05:16:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 4.193624868282402) internal successors, (15919), 3796 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 15919 transitions. [2021-06-05 05:16:12,727 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 15919 transitions. Word has length 23 [2021-06-05 05:16:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:12,727 INFO L482 AbstractCegarLoop]: Abstraction has 3797 states and 15919 transitions. [2021-06-05 05:16:12,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 15919 transitions. [2021-06-05 05:16:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:12,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:12,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:12,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 05:16:12,933 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash -283952035, now seen corresponding path program 122 times [2021-06-05 05:16:12,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:12,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544443486] [2021-06-05 05:16:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:13,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:13,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544443486] [2021-06-05 05:16:13,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544443486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462660526] [2021-06-05 05:16:13,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:13,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:13,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:13,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:16:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:13,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 05:16:13,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:13,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:13,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:13,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 05:16:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:13,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462660526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:13,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:16:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370807085] [2021-06-05 05:16:13,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:16:13,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:16:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:16:13,237 INFO L87 Difference]: Start difference. First operand 3797 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:13,669 INFO L93 Difference]: Finished difference Result 3954 states and 16507 transitions. [2021-06-05 05:16:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:16:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:13,678 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 05:16:13,678 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 05:16:13,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:16:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 05:16:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3789. [2021-06-05 05:16:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.19350580781415) internal successors, (15885), 3788 states have internal predecessors, (15885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15885 transitions. [2021-06-05 05:16:13,732 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15885 transitions. Word has length 23 [2021-06-05 05:16:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:13,732 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15885 transitions. [2021-06-05 05:16:13,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15885 transitions. [2021-06-05 05:16:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:13,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:13,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:13,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 05:16:13,938 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash 276609189, now seen corresponding path program 123 times [2021-06-05 05:16:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:13,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480587848] [2021-06-05 05:16:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:14,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480587848] [2021-06-05 05:16:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480587848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:14,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23591575] [2021-06-05 05:16:14,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:14,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:14,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:14,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:14,228 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:16:14,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:16:14,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:14,255 INFO L628 ElimStorePlain]: treesize reduction 70, result has 19.5 percent of original size [2021-06-05 05:16:14,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:14,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 05:16:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:14,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23591575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:14,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:14,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:16:14,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913700569] [2021-06-05 05:16:14,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:14,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:14,304 INFO L87 Difference]: Start difference. First operand 3789 states and 15885 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:15,046 INFO L93 Difference]: Finished difference Result 4225 states and 17591 transitions. [2021-06-05 05:16:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:16:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:15,054 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 05:16:15,055 INFO L226 Difference]: Without dead ends: 4210 [2021-06-05 05:16:15,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:16:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-06-05 05:16:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3785. [2021-06-05 05:16:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 4.193710359408033) internal successors, (15869), 3784 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 15869 transitions. [2021-06-05 05:16:15,110 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 15869 transitions. Word has length 23 [2021-06-05 05:16:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:15,111 INFO L482 AbstractCegarLoop]: Abstraction has 3785 states and 15869 transitions. [2021-06-05 05:16:15,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 15869 transitions. [2021-06-05 05:16:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:15,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:15,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:15,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-06-05 05:16:15,317 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 948426341, now seen corresponding path program 124 times [2021-06-05 05:16:15,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:15,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727731167] [2021-06-05 05:16:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:15,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:15,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727731167] [2021-06-05 05:16:15,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727731167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:15,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316012772] [2021-06-05 05:16:15,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:15,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:15,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:15,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:15,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:15,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:15,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:15,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:15,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316012772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:15,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:15,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:15,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877510071] [2021-06-05 05:16:15,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:15,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:15,637 INFO L87 Difference]: Start difference. First operand 3785 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:16,299 INFO L93 Difference]: Finished difference Result 4061 states and 16939 transitions. [2021-06-05 05:16:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:16:16,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:16,307 INFO L225 Difference]: With dead ends: 4061 [2021-06-05 05:16:16,307 INFO L226 Difference]: Without dead ends: 4046 [2021-06-05 05:16:16,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-06-05 05:16:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3793. [2021-06-05 05:16:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193829113924051) internal successors, (15903), 3792 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15903 transitions. [2021-06-05 05:16:16,360 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15903 transitions. Word has length 23 [2021-06-05 05:16:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:16,360 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15903 transitions. [2021-06-05 05:16:16,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15903 transitions. [2021-06-05 05:16:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:16,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:16,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:16,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:16,566 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1461953193, now seen corresponding path program 125 times [2021-06-05 05:16:16,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:16,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822855318] [2021-06-05 05:16:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:16,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:16,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822855318] [2021-06-05 05:16:16,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822855318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:16,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171482332] [2021-06-05 05:16:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:16,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:16,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:16,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:16,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:16,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:16,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:16,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:16,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:16,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171482332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:16,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:16,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:16,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666102516] [2021-06-05 05:16:16,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:16,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:16,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:16,897 INFO L87 Difference]: Start difference. First operand 3793 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:17,677 INFO L93 Difference]: Finished difference Result 4020 states and 16767 transitions. [2021-06-05 05:16:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:16:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:17,685 INFO L225 Difference]: With dead ends: 4020 [2021-06-05 05:16:17,685 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 05:16:17,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:16:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 05:16:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3797. [2021-06-05 05:16:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 4.193624868282402) internal successors, (15919), 3796 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 15919 transitions. [2021-06-05 05:16:17,739 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 15919 transitions. Word has length 23 [2021-06-05 05:16:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:17,739 INFO L482 AbstractCegarLoop]: Abstraction has 3797 states and 15919 transitions. [2021-06-05 05:16:17,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 15919 transitions. [2021-06-05 05:16:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:17,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:17,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:17,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:17,945 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:17,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1757302947, now seen corresponding path program 126 times [2021-06-05 05:16:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:17,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368776971] [2021-06-05 05:16:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:18,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368776971] [2021-06-05 05:16:18,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368776971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891268716] [2021-06-05 05:16:18,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:18,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:16:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:16:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:18,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:18,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 05:16:18,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:18,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:18,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:18,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 05:16:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891268716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:18,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:16:18,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946491307] [2021-06-05 05:16:18,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:16:18,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:18,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:16:18,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:16:18,273 INFO L87 Difference]: Start difference. First operand 3797 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:18,791 INFO L93 Difference]: Finished difference Result 4018 states and 16766 transitions. [2021-06-05 05:16:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:16:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:18,799 INFO L225 Difference]: With dead ends: 4018 [2021-06-05 05:16:18,799 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 05:16:18,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 05:16:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3789. [2021-06-05 05:16:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.19350580781415) internal successors, (15885), 3788 states have internal predecessors, (15885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15885 transitions. [2021-06-05 05:16:18,853 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15885 transitions. Word has length 23 [2021-06-05 05:16:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:18,854 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15885 transitions. [2021-06-05 05:16:18,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15885 transitions. [2021-06-05 05:16:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:18,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:18,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:19,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 05:16:19,060 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1586488015, now seen corresponding path program 127 times [2021-06-05 05:16:19,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:19,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040003163] [2021-06-05 05:16:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:19,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040003163] [2021-06-05 05:16:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040003163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20836083] [2021-06-05 05:16:19,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:19,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:19,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:19,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:19,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:19,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:19,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20836083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:19,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:19,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:19,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922582444] [2021-06-05 05:16:19,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:19,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:19,382 INFO L87 Difference]: Start difference. First operand 3789 states and 15885 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:19,914 INFO L93 Difference]: Finished difference Result 4020 states and 16771 transitions. [2021-06-05 05:16:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:16:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:19,922 INFO L225 Difference]: With dead ends: 4020 [2021-06-05 05:16:19,922 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 05:16:19,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 447.2ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 05:16:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3783. [2021-06-05 05:16:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 05:16:19,975 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 05:16:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:19,975 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 05:16:19,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 05:16:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:19,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:19,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:20,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:20,182 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1604229199, now seen corresponding path program 128 times [2021-06-05 05:16:20,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:20,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090541080] [2021-06-05 05:16:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:20,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090541080] [2021-06-05 05:16:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090541080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842713981] [2021-06-05 05:16:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:20,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:20,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:20,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:20,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:20,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:20,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:20,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:20,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:20,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842713981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:20,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:20,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758399702] [2021-06-05 05:16:20,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:20,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:20,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:20,527 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:21,219 INFO L93 Difference]: Finished difference Result 4101 states and 17095 transitions. [2021-06-05 05:16:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:16:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:21,228 INFO L225 Difference]: With dead ends: 4101 [2021-06-05 05:16:21,228 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 05:16:21,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 574.2ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:16:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 05:16:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3788. [2021-06-05 05:16:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193556905202007) internal successors, (15881), 3787 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15881 transitions. [2021-06-05 05:16:21,293 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15881 transitions. Word has length 23 [2021-06-05 05:16:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:21,294 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15881 transitions. [2021-06-05 05:16:21,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15881 transitions. [2021-06-05 05:16:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:21,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:21,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:21,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 05:16:21,517 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1182294931, now seen corresponding path program 129 times [2021-06-05 05:16:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:21,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236382733] [2021-06-05 05:16:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:21,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:21,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236382733] [2021-06-05 05:16:21,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236382733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:21,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309920224] [2021-06-05 05:16:21,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:21,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:21,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:16:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:21,800 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:16:21,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:16:21,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:21,824 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 05:16:21,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:21,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:16:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:21,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309920224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:21,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:21,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:16:21,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499243593] [2021-06-05 05:16:21,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:21,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:21,871 INFO L87 Difference]: Start difference. First operand 3788 states and 15881 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:22,678 INFO L93 Difference]: Finished difference Result 4353 states and 18101 transitions. [2021-06-05 05:16:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:16:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:22,689 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 05:16:22,689 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 05:16:22,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:16:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 05:16:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3796. [2021-06-05 05:16:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.1936758893280635) internal successors, (15915), 3795 states have internal predecessors, (15915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15915 transitions. [2021-06-05 05:16:22,749 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15915 transitions. Word has length 23 [2021-06-05 05:16:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:22,749 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15915 transitions. [2021-06-05 05:16:22,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15915 transitions. [2021-06-05 05:16:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:22,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:22,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:22,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:22,973 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash 276133971, now seen corresponding path program 130 times [2021-06-05 05:16:22,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:22,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546576290] [2021-06-05 05:16:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:23,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:23,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546576290] [2021-06-05 05:16:23,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546576290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467555878] [2021-06-05 05:16:23,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:23,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:23,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:23,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:23,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:23,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:23,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:23,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467555878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:23,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257097374] [2021-06-05 05:16:23,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:23,343 INFO L87 Difference]: Start difference. First operand 3796 states and 15915 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:24,253 INFO L93 Difference]: Finished difference Result 4123 states and 17177 transitions. [2021-06-05 05:16:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:16:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:24,261 INFO L225 Difference]: With dead ends: 4123 [2021-06-05 05:16:24,261 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 05:16:24,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 05:16:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3800. [2021-06-05 05:16:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.193471966306923) internal successors, (15931), 3799 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15931 transitions. [2021-06-05 05:16:24,313 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15931 transitions. Word has length 23 [2021-06-05 05:16:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:24,313 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15931 transitions. [2021-06-05 05:16:24,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15931 transitions. [2021-06-05 05:16:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:24,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:24,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:24,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 05:16:24,519 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1351845127, now seen corresponding path program 131 times [2021-06-05 05:16:24,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:24,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973181832] [2021-06-05 05:16:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973181832] [2021-06-05 05:16:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973181832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198834032] [2021-06-05 05:16:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:24,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:24,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:24,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:24,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:24,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:24,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:24,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:24,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:24,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198834032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:24,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:24,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:24,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365430567] [2021-06-05 05:16:24,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:24,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:24,862 INFO L87 Difference]: Start difference. First operand 3800 states and 15931 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:25,854 INFO L93 Difference]: Finished difference Result 4124 states and 17193 transitions. [2021-06-05 05:16:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:16:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:25,862 INFO L225 Difference]: With dead ends: 4124 [2021-06-05 05:16:25,862 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 05:16:25,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:16:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 05:16:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3792. [2021-06-05 05:16:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.193352677393827) internal successors, (15897), 3791 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15897 transitions. [2021-06-05 05:16:25,919 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15897 transitions. Word has length 23 [2021-06-05 05:16:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:25,919 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15897 transitions. [2021-06-05 05:16:25,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15897 transitions. [2021-06-05 05:16:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:25,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:25,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:26,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 05:16:26,125 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:26,126 INFO L82 PathProgramCache]: Analyzing trace with hash -146402489, now seen corresponding path program 132 times [2021-06-05 05:16:26,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:26,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185730618] [2021-06-05 05:16:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:26,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:26,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185730618] [2021-06-05 05:16:26,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185730618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:26,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230523439] [2021-06-05 05:16:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:26,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:26,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:26,406 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:16:26,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:16:26,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:26,437 INFO L628 ElimStorePlain]: treesize reduction 55, result has 20.3 percent of original size [2021-06-05 05:16:26,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:26,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:16:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:26,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230523439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:26,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:26,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:16:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59836385] [2021-06-05 05:16:26,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:26,483 INFO L87 Difference]: Start difference. First operand 3792 states and 15897 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:27,247 INFO L93 Difference]: Finished difference Result 4163 states and 17343 transitions. [2021-06-05 05:16:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:16:27,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:27,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:27,256 INFO L225 Difference]: With dead ends: 4163 [2021-06-05 05:16:27,256 INFO L226 Difference]: Without dead ends: 4148 [2021-06-05 05:16:27,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-06-05 05:16:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3784. [2021-06-05 05:16:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.193232883954534) internal successors, (15863), 3783 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 15863 transitions. [2021-06-05 05:16:27,310 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 15863 transitions. Word has length 23 [2021-06-05 05:16:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:27,310 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 15863 transitions. [2021-06-05 05:16:27,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 15863 transitions. [2021-06-05 05:16:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:27,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:27,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:27,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:27,549 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash 3943545, now seen corresponding path program 133 times [2021-06-05 05:16:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:27,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336720269] [2021-06-05 05:16:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:27,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336720269] [2021-06-05 05:16:27,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336720269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062620284] [2021-06-05 05:16:27,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:27,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:27,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:27,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:27,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:27,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:27,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:27,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062620284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:27,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:27,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:27,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587795028] [2021-06-05 05:16:27,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:27,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:27,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:27,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:27,847 INFO L87 Difference]: Start difference. First operand 3784 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:28,767 INFO L93 Difference]: Finished difference Result 4544 states and 18861 transitions. [2021-06-05 05:16:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:16:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:28,777 INFO L225 Difference]: With dead ends: 4544 [2021-06-05 05:16:28,777 INFO L226 Difference]: Without dead ends: 4522 [2021-06-05 05:16:28,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-06-05 05:16:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 3796. [2021-06-05 05:16:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.194729907773386) internal successors, (15919), 3795 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15919 transitions. [2021-06-05 05:16:28,836 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15919 transitions. Word has length 23 [2021-06-05 05:16:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:28,836 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15919 transitions. [2021-06-05 05:16:28,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15919 transitions. [2021-06-05 05:16:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:28,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:28,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:29,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 05:16:29,043 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash -902217415, now seen corresponding path program 134 times [2021-06-05 05:16:29,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:29,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980686755] [2021-06-05 05:16:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980686755] [2021-06-05 05:16:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980686755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785968237] [2021-06-05 05:16:29,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:29,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:29,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:29,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:29,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:29,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785968237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:29,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245875925] [2021-06-05 05:16:29,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:29,359 INFO L87 Difference]: Start difference. First operand 3796 states and 15919 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:30,227 INFO L93 Difference]: Finished difference Result 4393 states and 18248 transitions. [2021-06-05 05:16:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:16:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:30,236 INFO L225 Difference]: With dead ends: 4393 [2021-06-05 05:16:30,237 INFO L226 Difference]: Without dead ends: 4368 [2021-06-05 05:16:30,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 745.5ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2021-06-05 05:16:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 3800. [2021-06-05 05:16:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.1945248749670965) internal successors, (15935), 3799 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15935 transitions. [2021-06-05 05:16:30,293 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15935 transitions. Word has length 23 [2021-06-05 05:16:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:30,293 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15935 transitions. [2021-06-05 05:16:30,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15935 transitions. [2021-06-05 05:16:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:30,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:30,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:30,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:30,499 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:30,500 INFO L82 PathProgramCache]: Analyzing trace with hash 173493741, now seen corresponding path program 135 times [2021-06-05 05:16:30,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:30,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266375824] [2021-06-05 05:16:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:30,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:30,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266375824] [2021-06-05 05:16:30,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266375824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:30,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787388104] [2021-06-05 05:16:30,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:30,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:30,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:30,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:30,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:30,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:30,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787388104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:30,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58154753] [2021-06-05 05:16:30,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:30,859 INFO L87 Difference]: Start difference. First operand 3800 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:31,833 INFO L93 Difference]: Finished difference Result 4379 states and 18199 transitions. [2021-06-05 05:16:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:16:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:31,843 INFO L225 Difference]: With dead ends: 4379 [2021-06-05 05:16:31,843 INFO L226 Difference]: Without dead ends: 4358 [2021-06-05 05:16:31,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:16:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-06-05 05:16:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 3792. [2021-06-05 05:16:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.194407807966236) internal successors, (15901), 3791 states have internal predecessors, (15901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15901 transitions. [2021-06-05 05:16:31,900 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15901 transitions. Word has length 23 [2021-06-05 05:16:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:31,900 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15901 transitions. [2021-06-05 05:16:31,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15901 transitions. [2021-06-05 05:16:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:31,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:31,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:32,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 05:16:32,106 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash -161265317, now seen corresponding path program 136 times [2021-06-05 05:16:32,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:32,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189483102] [2021-06-05 05:16:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:32,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189483102] [2021-06-05 05:16:32,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189483102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92355756] [2021-06-05 05:16:32,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:32,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:32,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:32,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:32,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:32,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92355756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:32,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:32,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266590495] [2021-06-05 05:16:32,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:32,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:32,413 INFO L87 Difference]: Start difference. First operand 3792 states and 15901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:33,299 INFO L93 Difference]: Finished difference Result 4644 states and 19238 transitions. [2021-06-05 05:16:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:16:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:33,309 INFO L225 Difference]: With dead ends: 4644 [2021-06-05 05:16:33,309 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 05:16:33,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 05:16:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 3796. [2021-06-05 05:16:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.194729907773386) internal successors, (15919), 3795 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15919 transitions. [2021-06-05 05:16:33,370 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15919 transitions. Word has length 23 [2021-06-05 05:16:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:33,370 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15919 transitions. [2021-06-05 05:16:33,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15919 transitions. [2021-06-05 05:16:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:33,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:33,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:33,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:33,577 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash 426480005, now seen corresponding path program 137 times [2021-06-05 05:16:33,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:33,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957704644] [2021-06-05 05:16:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:33,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:33,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957704644] [2021-06-05 05:16:33,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957704644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:33,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524777820] [2021-06-05 05:16:33,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:33,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:16:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:33,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:33,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 05:16:33,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:33,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:33,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:33,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 05:16:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:33,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524777820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:33,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:33,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:16:33,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752207808] [2021-06-05 05:16:33,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:16:33,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:16:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:16:33,914 INFO L87 Difference]: Start difference. First operand 3796 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:34,469 INFO L93 Difference]: Finished difference Result 4358 states and 18111 transitions. [2021-06-05 05:16:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:16:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:34,478 INFO L225 Difference]: With dead ends: 4358 [2021-06-05 05:16:34,478 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 05:16:34,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 05:16:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3800. [2021-06-05 05:16:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.1945248749670965) internal successors, (15935), 3799 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15935 transitions. [2021-06-05 05:16:34,545 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15935 transitions. Word has length 23 [2021-06-05 05:16:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:34,545 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15935 transitions. [2021-06-05 05:16:34,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15935 transitions. [2021-06-05 05:16:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:34,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:34,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:34,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-05 05:16:34,752 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1502191161, now seen corresponding path program 138 times [2021-06-05 05:16:34,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:34,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321682365] [2021-06-05 05:16:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:34,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321682365] [2021-06-05 05:16:34,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321682365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081207185] [2021-06-05 05:16:34,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:34,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:34,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:34,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:34,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:34,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:34,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081207185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:35,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:35,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:35,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419298402] [2021-06-05 05:16:35,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:35,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:35,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:35,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:35,068 INFO L87 Difference]: Start difference. First operand 3800 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:36,048 INFO L93 Difference]: Finished difference Result 4380 states and 18199 transitions. [2021-06-05 05:16:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:16:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:36,057 INFO L225 Difference]: With dead ends: 4380 [2021-06-05 05:16:36,058 INFO L226 Difference]: Without dead ends: 4359 [2021-06-05 05:16:36,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:16:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-06-05 05:16:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3788. [2021-06-05 05:16:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193556905202007) internal successors, (15881), 3787 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15881 transitions. [2021-06-05 05:16:36,117 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15881 transitions. Word has length 23 [2021-06-05 05:16:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:36,117 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15881 transitions. [2021-06-05 05:16:36,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15881 transitions. [2021-06-05 05:16:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:36,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:36,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:36,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 05:16:36,324 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:36,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2108485085, now seen corresponding path program 139 times [2021-06-05 05:16:36,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:36,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009164845] [2021-06-05 05:16:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:36,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009164845] [2021-06-05 05:16:36,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009164845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375561669] [2021-06-05 05:16:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:36,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:36,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:36,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:36,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:36,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:36,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:36,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:36,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375561669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:36,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:36,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:36,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578005947] [2021-06-05 05:16:36,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:36,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:36,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:36,663 INFO L87 Difference]: Start difference. First operand 3788 states and 15881 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:37,394 INFO L93 Difference]: Finished difference Result 4286 states and 17831 transitions. [2021-06-05 05:16:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:16:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:37,403 INFO L225 Difference]: With dead ends: 4286 [2021-06-05 05:16:37,403 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 05:16:37,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:16:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 05:16:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3796. [2021-06-05 05:16:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.1936758893280635) internal successors, (15915), 3795 states have internal predecessors, (15915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15915 transitions. [2021-06-05 05:16:37,456 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15915 transitions. Word has length 23 [2021-06-05 05:16:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:37,456 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15915 transitions. [2021-06-05 05:16:37,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15915 transitions. [2021-06-05 05:16:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:37,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:37,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:37,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 05:16:37,662 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1280321251, now seen corresponding path program 140 times [2021-06-05 05:16:37,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:37,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605852809] [2021-06-05 05:16:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:37,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:37,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605852809] [2021-06-05 05:16:37,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605852809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:37,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988605965] [2021-06-05 05:16:37,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:37,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:37,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:37,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:37,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:37,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:37,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:37,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:37,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:37,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:37,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988605965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:37,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:37,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:37,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992798908] [2021-06-05 05:16:37,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:37,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:37,982 INFO L87 Difference]: Start difference. First operand 3796 states and 15915 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:38,874 INFO L93 Difference]: Finished difference Result 4194 states and 17454 transitions. [2021-06-05 05:16:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:16:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:38,882 INFO L225 Difference]: With dead ends: 4194 [2021-06-05 05:16:38,883 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 05:16:38,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:16:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 05:16:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3800. [2021-06-05 05:16:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.193471966306923) internal successors, (15931), 3799 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15931 transitions. [2021-06-05 05:16:38,936 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15931 transitions. Word has length 23 [2021-06-05 05:16:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:38,936 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15931 transitions. [2021-06-05 05:16:38,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15931 transitions. [2021-06-05 05:16:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:38,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:38,942 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:39,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:39,142 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:39,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1938934889, now seen corresponding path program 141 times [2021-06-05 05:16:39,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:39,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655318735] [2021-06-05 05:16:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:39,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655318735] [2021-06-05 05:16:39,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655318735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:39,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085887844] [2021-06-05 05:16:39,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:39,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:39,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:16:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:39,393 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:16:39,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 05:16:39,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:39,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:39,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:39,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 05:16:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:39,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085887844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:39,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:39,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:16:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96860732] [2021-06-05 05:16:39,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:39,508 INFO L87 Difference]: Start difference. First operand 3800 states and 15931 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:40,390 INFO L93 Difference]: Finished difference Result 4276 states and 17781 transitions. [2021-06-05 05:16:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:40,398 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 05:16:40,398 INFO L226 Difference]: Without dead ends: 4255 [2021-06-05 05:16:40,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:16:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-06-05 05:16:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3792. [2021-06-05 05:16:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.193352677393827) internal successors, (15897), 3791 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15897 transitions. [2021-06-05 05:16:40,475 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15897 transitions. Word has length 23 [2021-06-05 05:16:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:40,475 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15897 transitions. [2021-06-05 05:16:40,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15897 transitions. [2021-06-05 05:16:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:40,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:40,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:40,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:40,681 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 857784791, now seen corresponding path program 142 times [2021-06-05 05:16:40,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:40,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270253228] [2021-06-05 05:16:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:40,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:40,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270253228] [2021-06-05 05:16:40,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270253228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297009542] [2021-06-05 05:16:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:40,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:40,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:40,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:40,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:40,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:40,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:40,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:40,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:40,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297009542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:40,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:40,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:40,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220508781] [2021-06-05 05:16:40,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:40,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:40,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:40,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:40,986 INFO L87 Difference]: Start difference. First operand 3792 states and 15897 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:41,604 INFO L93 Difference]: Finished difference Result 4201 states and 17496 transitions. [2021-06-05 05:16:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:16:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:41,612 INFO L225 Difference]: With dead ends: 4201 [2021-06-05 05:16:41,613 INFO L226 Difference]: Without dead ends: 4178 [2021-06-05 05:16:41,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:16:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-06-05 05:16:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3780. [2021-06-05 05:16:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3780 states, 3779 states have (on average 4.192378936226515) internal successors, (15843), 3779 states have internal predecessors, (15843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3780 states to 3780 states and 15843 transitions. [2021-06-05 05:16:41,665 INFO L78 Accepts]: Start accepts. Automaton has 3780 states and 15843 transitions. Word has length 23 [2021-06-05 05:16:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:41,665 INFO L482 AbstractCegarLoop]: Abstraction has 3780 states and 15843 transitions. [2021-06-05 05:16:41,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3780 states and 15843 transitions. [2021-06-05 05:16:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:41,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:41,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:41,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 05:16:41,871 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash 833044733, now seen corresponding path program 143 times [2021-06-05 05:16:41,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:41,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362802291] [2021-06-05 05:16:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:41,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362802291] [2021-06-05 05:16:41,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362802291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211689293] [2021-06-05 05:16:41,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:41,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:41,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:42,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:42,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:42,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:42,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:42,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:42,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211689293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:42,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:42,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:42,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860052462] [2021-06-05 05:16:42,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:42,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:42,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:42,184 INFO L87 Difference]: Start difference. First operand 3780 states and 15843 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:42,770 INFO L93 Difference]: Finished difference Result 4130 states and 17208 transitions. [2021-06-05 05:16:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:16:42,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:42,779 INFO L225 Difference]: With dead ends: 4130 [2021-06-05 05:16:42,779 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 05:16:42,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:16:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 05:16:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3786. [2021-06-05 05:16:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.192866578599736) internal successors, (15870), 3785 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 15870 transitions. [2021-06-05 05:16:42,833 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 15870 transitions. Word has length 23 [2021-06-05 05:16:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:42,833 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 15870 transitions. [2021-06-05 05:16:42,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 15870 transitions. [2021-06-05 05:16:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:42,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:42,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:43,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 05:16:43,039 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1418378685, now seen corresponding path program 144 times [2021-06-05 05:16:43,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:43,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089620294] [2021-06-05 05:16:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:43,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:43,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089620294] [2021-06-05 05:16:43,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089620294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:43,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530802119] [2021-06-05 05:16:43,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:43,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:43,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:43,297 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:16:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:16:43,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:43,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:43,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:43,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:16:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:43,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530802119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:43,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:43,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:16:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295939047] [2021-06-05 05:16:43,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:43,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:43,403 INFO L87 Difference]: Start difference. First operand 3786 states and 15870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:44,060 INFO L93 Difference]: Finished difference Result 4176 states and 17375 transitions. [2021-06-05 05:16:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:16:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:44,069 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 05:16:44,069 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 05:16:44,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:16:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 05:16:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3790. [2021-06-05 05:16:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.192662971760359) internal successors, (15886), 3789 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15886 transitions. [2021-06-05 05:16:44,125 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15886 transitions. Word has length 23 [2021-06-05 05:16:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:44,125 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15886 transitions. [2021-06-05 05:16:44,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15886 transitions. [2021-06-05 05:16:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:44,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:44,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:44,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:44,331 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1263021877, now seen corresponding path program 145 times [2021-06-05 05:16:44,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:44,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136925364] [2021-06-05 05:16:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:44,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:44,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136925364] [2021-06-05 05:16:44,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136925364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:44,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313824472] [2021-06-05 05:16:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:44,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:44,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:44,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:44,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:44,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:44,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:44,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313824472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:44,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:44,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:44,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58725967] [2021-06-05 05:16:44,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:44,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:44,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:44,661 INFO L87 Difference]: Start difference. First operand 3790 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:45,232 INFO L93 Difference]: Finished difference Result 4066 states and 16938 transitions. [2021-06-05 05:16:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:16:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:45,240 INFO L225 Difference]: With dead ends: 4066 [2021-06-05 05:16:45,240 INFO L226 Difference]: Without dead ends: 4045 [2021-06-05 05:16:45,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-05 05:16:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3782. [2021-06-05 05:16:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 4.192541655646655) internal successors, (15852), 3781 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 15852 transitions. [2021-06-05 05:16:45,302 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 15852 transitions. Word has length 23 [2021-06-05 05:16:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:45,302 INFO L482 AbstractCegarLoop]: Abstraction has 3782 states and 15852 transitions. [2021-06-05 05:16:45,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 15852 transitions. [2021-06-05 05:16:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:45,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:45,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:45,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable659 [2021-06-05 05:16:45,508 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash 605823353, now seen corresponding path program 146 times [2021-06-05 05:16:45,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:45,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067737592] [2021-06-05 05:16:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:45,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067737592] [2021-06-05 05:16:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067737592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093434761] [2021-06-05 05:16:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:45,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:45,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:45,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:45,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:45,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093434761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:45,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718114652] [2021-06-05 05:16:45,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:45,832 INFO L87 Difference]: Start difference. First operand 3782 states and 15852 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:46,517 INFO L93 Difference]: Finished difference Result 4296 states and 17871 transitions. [2021-06-05 05:16:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:16:46,517 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:46,526 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 05:16:46,526 INFO L226 Difference]: Without dead ends: 4274 [2021-06-05 05:16:46,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:16:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-05 05:16:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3790. [2021-06-05 05:16:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.192926893639482) internal successors, (15887), 3789 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15887 transitions. [2021-06-05 05:16:46,582 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15887 transitions. Word has length 23 [2021-06-05 05:16:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:46,582 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15887 transitions. [2021-06-05 05:16:46,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15887 transitions. [2021-06-05 05:16:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:46,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:46,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:46,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:46,788 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1119350205, now seen corresponding path program 147 times [2021-06-05 05:16:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:46,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051157758] [2021-06-05 05:16:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:46,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:46,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051157758] [2021-06-05 05:16:46,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051157758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:46,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295032184] [2021-06-05 05:16:46,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:46,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:16:46,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:47,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:47,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:47,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:47,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:47,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:47,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295032184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174838925] [2021-06-05 05:16:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:47,151 INFO L87 Difference]: Start difference. First operand 3790 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:47,944 INFO L93 Difference]: Finished difference Result 4158 states and 17313 transitions. [2021-06-05 05:16:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:16:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:47,953 INFO L225 Difference]: With dead ends: 4158 [2021-06-05 05:16:47,953 INFO L226 Difference]: Without dead ends: 4133 [2021-06-05 05:16:47,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-06-05 05:16:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3794. [2021-06-05 05:16:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.192723437911943) internal successors, (15903), 3793 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15903 transitions. [2021-06-05 05:16:48,008 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15903 transitions. Word has length 23 [2021-06-05 05:16:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:48,009 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15903 transitions. [2021-06-05 05:16:48,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15903 transitions. [2021-06-05 05:16:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:48,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:48,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:48,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 05:16:48,215 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:48,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2099905935, now seen corresponding path program 148 times [2021-06-05 05:16:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:48,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853136509] [2021-06-05 05:16:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:48,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:48,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853136509] [2021-06-05 05:16:48,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853136509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:48,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913325699] [2021-06-05 05:16:48,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:48,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:48,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:48,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:48,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:48,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:48,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:48,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:48,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:48,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:48,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913325699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:48,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:48,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:48,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562638660] [2021-06-05 05:16:48,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:48,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:48,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:48,553 INFO L87 Difference]: Start difference. First operand 3794 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:49,386 INFO L93 Difference]: Finished difference Result 4162 states and 17329 transitions. [2021-06-05 05:16:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:16:49,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:49,395 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 05:16:49,395 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 05:16:49,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 699.1ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:16:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 05:16:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3786. [2021-06-05 05:16:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.192602377807133) internal successors, (15869), 3785 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 15869 transitions. [2021-06-05 05:16:49,451 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 15869 transitions. Word has length 23 [2021-06-05 05:16:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:49,451 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 15869 transitions. [2021-06-05 05:16:49,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 15869 transitions. [2021-06-05 05:16:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:49,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:49,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:49,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:49,657 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:49,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1818910083, now seen corresponding path program 149 times [2021-06-05 05:16:49,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:49,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782025608] [2021-06-05 05:16:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:49,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782025608] [2021-06-05 05:16:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782025608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107164464] [2021-06-05 05:16:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:49,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:49,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:49,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:16:49,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:49,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:49,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 05:16:49,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:49,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:49,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:49,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:16:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:50,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107164464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:50,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:50,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:16:50,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193834250] [2021-06-05 05:16:50,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:16:50,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:16:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:16:50,014 INFO L87 Difference]: Start difference. First operand 3786 states and 15869 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:50,481 INFO L93 Difference]: Finished difference Result 4022 states and 16771 transitions. [2021-06-05 05:16:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:16:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:50,489 INFO L225 Difference]: With dead ends: 4022 [2021-06-05 05:16:50,490 INFO L226 Difference]: Without dead ends: 3996 [2021-06-05 05:16:50,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:16:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2021-06-05 05:16:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3795. [2021-06-05 05:16:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.191091196626252) internal successors, (15901), 3794 states have internal predecessors, (15901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15901 transitions. [2021-06-05 05:16:50,547 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15901 transitions. Word has length 23 [2021-06-05 05:16:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:50,547 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15901 transitions. [2021-06-05 05:16:50,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15901 transitions. [2021-06-05 05:16:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:50,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:50,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:50,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 05:16:50,753 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1434481145, now seen corresponding path program 150 times [2021-06-05 05:16:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:50,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517851664] [2021-06-05 05:16:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:50,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:50,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517851664] [2021-06-05 05:16:50,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517851664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:50,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644023078] [2021-06-05 05:16:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:50,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:50,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:50,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:16:50,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:50,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:50,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:50,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:16:50,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:50,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:50,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:50,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 05:16:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:51,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644023078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:51,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:51,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661879743] [2021-06-05 05:16:51,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:51,085 INFO L87 Difference]: Start difference. First operand 3795 states and 15901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:51,553 INFO L93 Difference]: Finished difference Result 3999 states and 16678 transitions. [2021-06-05 05:16:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:16:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:51,561 INFO L225 Difference]: With dead ends: 3999 [2021-06-05 05:16:51,561 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 05:16:51,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 05:16:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3788. [2021-06-05 05:16:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.192500660153155) internal successors, (15877), 3787 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15877 transitions. [2021-06-05 05:16:51,616 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15877 transitions. Word has length 23 [2021-06-05 05:16:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:51,616 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15877 transitions. [2021-06-05 05:16:51,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15877 transitions. [2021-06-05 05:16:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:51,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:51,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:51,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable670 [2021-06-05 05:16:51,823 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1147359793, now seen corresponding path program 151 times [2021-06-05 05:16:51,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:51,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445275159] [2021-06-05 05:16:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:51,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:51,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445275159] [2021-06-05 05:16:51,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445275159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:51,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290369740] [2021-06-05 05:16:51,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:51,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:52,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:52,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:52,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:52,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:52,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290369740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:52,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:52,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145249123] [2021-06-05 05:16:52,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:52,168 INFO L87 Difference]: Start difference. First operand 3788 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:52,759 INFO L93 Difference]: Finished difference Result 4034 states and 16813 transitions. [2021-06-05 05:16:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:16:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:52,767 INFO L225 Difference]: With dead ends: 4034 [2021-06-05 05:16:52,767 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 05:16:52,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:16:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 05:16:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3792. [2021-06-05 05:16:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.192297546821419) internal successors, (15893), 3791 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15893 transitions. [2021-06-05 05:16:52,822 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15893 transitions. Word has length 23 [2021-06-05 05:16:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:52,822 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15893 transitions. [2021-06-05 05:16:52,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15893 transitions. [2021-06-05 05:16:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:52,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:52,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:53,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:53,029 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash 654142407, now seen corresponding path program 152 times [2021-06-05 05:16:53,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:53,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011317541] [2021-06-05 05:16:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:53,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011317541] [2021-06-05 05:16:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011317541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902612242] [2021-06-05 05:16:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:53,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:53,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:53,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:53,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:53,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:53,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:53,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:53,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:53,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:53,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902612242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:53,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:53,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:53,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771499349] [2021-06-05 05:16:53,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:53,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:53,447 INFO L87 Difference]: Start difference. First operand 3792 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:53,911 INFO L93 Difference]: Finished difference Result 4037 states and 16824 transitions. [2021-06-05 05:16:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:16:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:53,919 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 05:16:53,920 INFO L226 Difference]: Without dead ends: 4016 [2021-06-05 05:16:53,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-05 05:16:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3788. [2021-06-05 05:16:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.192500660153155) internal successors, (15877), 3787 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15877 transitions. [2021-06-05 05:16:53,975 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15877 transitions. Word has length 23 [2021-06-05 05:16:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:53,975 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15877 transitions. [2021-06-05 05:16:53,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15877 transitions. [2021-06-05 05:16:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:53,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:53,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:54,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 05:16:54,201 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1588918663, now seen corresponding path program 153 times [2021-06-05 05:16:54,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:54,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650040619] [2021-06-05 05:16:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:54,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:54,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650040619] [2021-06-05 05:16:54,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650040619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:54,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827611849] [2021-06-05 05:16:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:54,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:54,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:54,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:54,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:54,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:54,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:54,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827611849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:54,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:54,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:54,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663900831] [2021-06-05 05:16:54,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:54,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:54,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:54,552 INFO L87 Difference]: Start difference. First operand 3788 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:55,109 INFO L93 Difference]: Finished difference Result 4024 states and 16775 transitions. [2021-06-05 05:16:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:16:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:55,117 INFO L225 Difference]: With dead ends: 4024 [2021-06-05 05:16:55,117 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 05:16:55,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 05:16:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3792. [2021-06-05 05:16:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.192297546821419) internal successors, (15893), 3791 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15893 transitions. [2021-06-05 05:16:55,172 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15893 transitions. Word has length 23 [2021-06-05 05:16:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:55,172 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15893 transitions. [2021-06-05 05:16:55,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15893 transitions. [2021-06-05 05:16:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:55,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:55,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:55,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 05:16:55,379 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash 576226131, now seen corresponding path program 154 times [2021-06-05 05:16:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:55,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367381179] [2021-06-05 05:16:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:55,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367381179] [2021-06-05 05:16:55,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367381179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919240824] [2021-06-05 05:16:55,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:55,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:55,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:55,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:55,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:55,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:16:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919240824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:55,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:55,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914044979] [2021-06-05 05:16:55,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:55,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:55,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:55,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:55,730 INFO L87 Difference]: Start difference. First operand 3792 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:56,298 INFO L93 Difference]: Finished difference Result 4028 states and 16788 transitions. [2021-06-05 05:16:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:16:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:56,307 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 05:16:56,307 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 05:16:56,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:16:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 05:16:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3784. [2021-06-05 05:16:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.1924398625429555) internal successors, (15860), 3783 states have internal predecessors, (15860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 15860 transitions. [2021-06-05 05:16:56,363 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 15860 transitions. Word has length 23 [2021-06-05 05:16:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:56,363 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 15860 transitions. [2021-06-05 05:16:56,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 15860 transitions. [2021-06-05 05:16:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:56,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:56,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:56,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 05:16:56,570 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:56,570 INFO L82 PathProgramCache]: Analyzing trace with hash -242799119, now seen corresponding path program 155 times [2021-06-05 05:16:56,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:56,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618186869] [2021-06-05 05:16:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:56,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:56,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618186869] [2021-06-05 05:16:56,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618186869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:56,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154684124] [2021-06-05 05:16:56,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:56,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:56,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:56,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:56,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:56,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:56,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:56,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:56,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:16:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:56,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154684124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:56,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:56,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:56,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426157351] [2021-06-05 05:16:56,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:56,891 INFO L87 Difference]: Start difference. First operand 3784 states and 15860 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:57,565 INFO L93 Difference]: Finished difference Result 4539 states and 18837 transitions. [2021-06-05 05:16:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:16:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:57,575 INFO L225 Difference]: With dead ends: 4539 [2021-06-05 05:16:57,576 INFO L226 Difference]: Without dead ends: 4517 [2021-06-05 05:16:57,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:16:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-06-05 05:16:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3792. [2021-06-05 05:16:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.19361646003693) internal successors, (15898), 3791 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15898 transitions. [2021-06-05 05:16:57,637 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15898 transitions. Word has length 23 [2021-06-05 05:16:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:57,637 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15898 transitions. [2021-06-05 05:16:57,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15898 transitions. [2021-06-05 05:16:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:57,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:57,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:57,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 05:16:57,843 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash 270727733, now seen corresponding path program 156 times [2021-06-05 05:16:57,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:57,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207553325] [2021-06-05 05:16:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:57,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:57,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207553325] [2021-06-05 05:16:57,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207553325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:57,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297975918] [2021-06-05 05:16:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:57,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:16:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:58,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:58,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:58,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:58,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:58,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:58,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:58,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297975918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:58,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:58,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:58,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144868540] [2021-06-05 05:16:58,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:58,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:58,172 INFO L87 Difference]: Start difference. First operand 3792 states and 15898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:59,001 INFO L93 Difference]: Finished difference Result 4351 states and 18079 transitions. [2021-06-05 05:16:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:16:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:16:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:59,010 INFO L225 Difference]: With dead ends: 4351 [2021-06-05 05:16:59,010 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 05:16:59,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:16:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 05:16:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3796. [2021-06-05 05:16:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.193412384716733) internal successors, (15914), 3795 states have internal predecessors, (15914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15914 transitions. [2021-06-05 05:16:59,068 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15914 transitions. Word has length 23 [2021-06-05 05:16:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:59,068 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15914 transitions. [2021-06-05 05:16:59,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15914 transitions. [2021-06-05 05:16:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:16:59,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:59,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:59,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:59,274 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1346438889, now seen corresponding path program 157 times [2021-06-05 05:16:59,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:59,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542390848] [2021-06-05 05:16:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:59,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:59,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542390848] [2021-06-05 05:16:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542390848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:59,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109263547] [2021-06-05 05:16:59,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:59,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:59,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:59,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:59,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:59,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:59,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:16:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:59,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109263547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:59,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:59,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:16:59,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949367483] [2021-06-05 05:16:59,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:59,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:59,631 INFO L87 Difference]: Start difference. First operand 3796 states and 15914 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:00,421 INFO L93 Difference]: Finished difference Result 4353 states and 18091 transitions. [2021-06-05 05:17:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:17:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:00,430 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 05:17:00,430 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 05:17:00,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 05:17:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3788. [2021-06-05 05:17:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193292843939794) internal successors, (15880), 3787 states have internal predecessors, (15880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15880 transitions. [2021-06-05 05:17:00,485 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15880 transitions. Word has length 23 [2021-06-05 05:17:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:00,485 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15880 transitions. [2021-06-05 05:17:00,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15880 transitions. [2021-06-05 05:17:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:00,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:00,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:00,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 05:17:00,692 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash 166708379, now seen corresponding path program 158 times [2021-06-05 05:17:00,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:00,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449188480] [2021-06-05 05:17:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:00,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449188480] [2021-06-05 05:17:00,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449188480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993488376] [2021-06-05 05:17:00,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:00,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:00,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:00,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:00,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:00,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:00,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:00,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:01,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993488376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:01,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:01,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707740972] [2021-06-05 05:17:01,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:01,007 INFO L87 Difference]: Start difference. First operand 3788 states and 15880 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:01,880 INFO L93 Difference]: Finished difference Result 4542 states and 18821 transitions. [2021-06-05 05:17:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:01,890 INFO L225 Difference]: With dead ends: 4542 [2021-06-05 05:17:01,890 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 05:17:01,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 642.9ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 05:17:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3792. [2021-06-05 05:17:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.19361646003693) internal successors, (15898), 3791 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15898 transitions. [2021-06-05 05:17:01,950 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15898 transitions. Word has length 23 [2021-06-05 05:17:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:01,950 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15898 transitions. [2021-06-05 05:17:01,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15898 transitions. [2021-06-05 05:17:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:01,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:01,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:02,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 05:17:02,156 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash 754453701, now seen corresponding path program 159 times [2021-06-05 05:17:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:02,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300441183] [2021-06-05 05:17:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:02,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:02,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300441183] [2021-06-05 05:17:02,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300441183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:02,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328291579] [2021-06-05 05:17:02,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:02,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:02,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:02,413 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:17:02,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:02,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:02,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:02,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:17:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:02,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328291579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:02,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:02,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:17:02,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975769668] [2021-06-05 05:17:02,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:02,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:02,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:02,534 INFO L87 Difference]: Start difference. First operand 3792 states and 15898 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:03,634 INFO L93 Difference]: Finished difference Result 4418 states and 18365 transitions. [2021-06-05 05:17:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:03,643 INFO L225 Difference]: With dead ends: 4418 [2021-06-05 05:17:03,643 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 05:17:03,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 762.0ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 05:17:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3804. [2021-06-05 05:17:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.192216671049172) internal successors, (15943), 3803 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15943 transitions. [2021-06-05 05:17:03,700 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15943 transitions. Word has length 23 [2021-06-05 05:17:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:03,700 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15943 transitions. [2021-06-05 05:17:03,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15943 transitions. [2021-06-05 05:17:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:03,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:03,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:03,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 05:17:03,906 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1830164857, now seen corresponding path program 160 times [2021-06-05 05:17:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:03,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380404483] [2021-06-05 05:17:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:04,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:04,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380404483] [2021-06-05 05:17:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380404483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:04,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449159296] [2021-06-05 05:17:04,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:04,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:04,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:04,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:04,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:04,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:04,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:04,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449159296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:04,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:04,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013932132] [2021-06-05 05:17:04,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:04,234 INFO L87 Difference]: Start difference. First operand 3804 states and 15943 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:05,050 INFO L93 Difference]: Finished difference Result 4380 states and 18184 transitions. [2021-06-05 05:17:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:17:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:05,060 INFO L225 Difference]: With dead ends: 4380 [2021-06-05 05:17:05,060 INFO L226 Difference]: Without dead ends: 4359 [2021-06-05 05:17:05,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:17:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-06-05 05:17:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3792. [2021-06-05 05:17:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.191242416249011) internal successors, (15889), 3791 states have internal predecessors, (15889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15889 transitions. [2021-06-05 05:17:05,120 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15889 transitions. Word has length 23 [2021-06-05 05:17:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:05,120 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15889 transitions. [2021-06-05 05:17:05,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15889 transitions. [2021-06-05 05:17:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:05,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:05,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:05,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:05,327 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1566452255, now seen corresponding path program 161 times [2021-06-05 05:17:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:05,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941968522] [2021-06-05 05:17:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:05,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:05,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941968522] [2021-06-05 05:17:05,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941968522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736959025] [2021-06-05 05:17:05,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:05,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:05,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:05,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:05,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:05,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:05,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:05,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:05,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:17:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:05,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736959025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:05,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:05,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902901698] [2021-06-05 05:17:05,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:05,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:05,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:05,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:05,663 INFO L87 Difference]: Start difference. First operand 3792 states and 15889 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:06,371 INFO L93 Difference]: Finished difference Result 4170 states and 17358 transitions. [2021-06-05 05:17:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:17:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:06,379 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 05:17:06,379 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 05:17:06,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:17:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 05:17:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3802. [2021-06-05 05:17:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.18863456985004) internal successors, (15921), 3801 states have internal predecessors, (15921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15921 transitions. [2021-06-05 05:17:06,431 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15921 transitions. Word has length 23 [2021-06-05 05:17:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:06,432 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15921 transitions. [2021-06-05 05:17:06,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15921 transitions. [2021-06-05 05:17:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:06,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:06,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:06,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:06,637 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:06,638 INFO L82 PathProgramCache]: Analyzing trace with hash 524876187, now seen corresponding path program 162 times [2021-06-05 05:17:06,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:06,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892861369] [2021-06-05 05:17:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:06,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:06,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892861369] [2021-06-05 05:17:06,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892861369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:06,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501389891] [2021-06-05 05:17:06,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:06,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:06,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:06,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:06,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:06,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:06,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:17:06,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:06,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:06,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:06,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 05:17:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:06,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501389891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:06,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:06,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:06,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579856380] [2021-06-05 05:17:06,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:06,950 INFO L87 Difference]: Start difference. First operand 3802 states and 15921 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:07,365 INFO L93 Difference]: Finished difference Result 4038 states and 16829 transitions. [2021-06-05 05:17:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:17:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:07,374 INFO L225 Difference]: With dead ends: 4038 [2021-06-05 05:17:07,374 INFO L226 Difference]: Without dead ends: 4010 [2021-06-05 05:17:07,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2021-06-05 05:17:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3795. [2021-06-05 05:17:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.1892461781760675) internal successors, (15894), 3794 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15894 transitions. [2021-06-05 05:17:07,430 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15894 transitions. Word has length 23 [2021-06-05 05:17:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:07,430 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15894 transitions. [2021-06-05 05:17:07,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15894 transitions. [2021-06-05 05:17:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:07,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:07,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:07,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 05:17:07,637 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash -360922093, now seen corresponding path program 163 times [2021-06-05 05:17:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:07,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858209042] [2021-06-05 05:17:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:07,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858209042] [2021-06-05 05:17:07,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858209042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720173033] [2021-06-05 05:17:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:07,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:07,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:07,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:07,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:07,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:07,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:07,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720173033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:07,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:07,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:07,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329144477] [2021-06-05 05:17:07,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:07,965 INFO L87 Difference]: Start difference. First operand 3795 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:08,400 INFO L93 Difference]: Finished difference Result 4204 states and 17490 transitions. [2021-06-05 05:17:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:17:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:08,409 INFO L225 Difference]: With dead ends: 4204 [2021-06-05 05:17:08,409 INFO L226 Difference]: Without dead ends: 4170 [2021-06-05 05:17:08,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-06-05 05:17:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3792. [2021-06-05 05:17:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 05:17:08,466 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 05:17:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:08,466 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 05:17:08,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 05:17:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:08,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:08,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:08,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 05:17:08,672 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash -545976375, now seen corresponding path program 164 times [2021-06-05 05:17:08,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:08,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14980822] [2021-06-05 05:17:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:08,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:08,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14980822] [2021-06-05 05:17:08,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14980822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:08,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672300529] [2021-06-05 05:17:08,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:08,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:08,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:08,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:08,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:08,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:08,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:09,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672300529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:09,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:09,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:09,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933369946] [2021-06-05 05:17:09,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:09,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:09,062 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:09,730 INFO L93 Difference]: Finished difference Result 4133 states and 17209 transitions. [2021-06-05 05:17:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:17:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:09,739 INFO L225 Difference]: With dead ends: 4133 [2021-06-05 05:17:09,739 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 05:17:09,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:17:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 05:17:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3801. [2021-06-05 05:17:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 4.1889473684210525) internal successors, (15918), 3800 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 15918 transitions. [2021-06-05 05:17:09,794 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 15918 transitions. Word has length 23 [2021-06-05 05:17:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:09,794 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 15918 transitions. [2021-06-05 05:17:09,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 15918 transitions. [2021-06-05 05:17:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:09,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:09,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:10,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 05:17:10,000 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1587552443, now seen corresponding path program 165 times [2021-06-05 05:17:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:10,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872826667] [2021-06-05 05:17:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872826667] [2021-06-05 05:17:10,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872826667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175819845] [2021-06-05 05:17:10,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:10,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:10,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:10,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:17:10,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:10,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 05:17:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175819845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:10,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527532695] [2021-06-05 05:17:10,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:10,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:10,385 INFO L87 Difference]: Start difference. First operand 3801 states and 15918 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:11,008 INFO L93 Difference]: Finished difference Result 4050 states and 16875 transitions. [2021-06-05 05:17:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:17:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:11,017 INFO L225 Difference]: With dead ends: 4050 [2021-06-05 05:17:11,018 INFO L226 Difference]: Without dead ends: 4022 [2021-06-05 05:17:11,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-06-05 05:17:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3794. [2021-06-05 05:17:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 05:17:11,075 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 05:17:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:11,075 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 05:17:11,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 05:17:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:11,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:11,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:11,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 05:17:11,282 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1874673795, now seen corresponding path program 166 times [2021-06-05 05:17:11,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:11,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111073733] [2021-06-05 05:17:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:11,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:11,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111073733] [2021-06-05 05:17:11,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111073733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:11,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857566872] [2021-06-05 05:17:11,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:11,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:11,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:11,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:11,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:11,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:11,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:11,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:11,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:11,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857566872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:11,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:11,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:11,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846930633] [2021-06-05 05:17:11,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:11,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:11,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:11,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:11,629 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:12,244 INFO L93 Difference]: Finished difference Result 4044 states and 16847 transitions. [2021-06-05 05:17:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:17:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:12,252 INFO L225 Difference]: With dead ends: 4044 [2021-06-05 05:17:12,253 INFO L226 Difference]: Without dead ends: 4018 [2021-06-05 05:17:12,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:17:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-06-05 05:17:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3798. [2021-06-05 05:17:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 05:17:12,330 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 05:17:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:12,330 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 05:17:12,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 05:17:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:12,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:12,336 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:12,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:12,537 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1927076115, now seen corresponding path program 167 times [2021-06-05 05:17:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:12,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859524961] [2021-06-05 05:17:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:12,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:12,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859524961] [2021-06-05 05:17:12,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859524961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:12,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999579126] [2021-06-05 05:17:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:12,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:12,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:12,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:12,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:12,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:12,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:12,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:12,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:12,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999579126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:12,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:12,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:12,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343491996] [2021-06-05 05:17:12,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:12,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:12,875 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:13,430 INFO L93 Difference]: Finished difference Result 4052 states and 16882 transitions. [2021-06-05 05:17:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:17:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:13,439 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 05:17:13,439 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 05:17:13,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 05:17:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3794. [2021-06-05 05:17:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 05:17:13,497 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 05:17:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:13,497 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 05:17:13,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 05:17:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:13,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:13,503 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:13,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-05 05:17:13,703 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1433114925, now seen corresponding path program 168 times [2021-06-05 05:17:13,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:13,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885928417] [2021-06-05 05:17:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:13,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:13,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885928417] [2021-06-05 05:17:13,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885928417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238039713] [2021-06-05 05:17:13,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:13,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:13,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:13,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:13,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:13,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238039713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756927137] [2021-06-05 05:17:14,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:14,054 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:14,614 INFO L93 Difference]: Finished difference Result 4030 states and 16793 transitions. [2021-06-05 05:17:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:17:14,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:14,622 INFO L225 Difference]: With dead ends: 4030 [2021-06-05 05:17:14,622 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 05:17:14,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:17:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 05:17:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3798. [2021-06-05 05:17:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 05:17:14,676 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 05:17:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:14,676 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 05:17:14,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 05:17:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:14,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:14,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:14,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:14,882 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1849159839, now seen corresponding path program 169 times [2021-06-05 05:17:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:14,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696747547] [2021-06-05 05:17:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:14,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:14,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696747547] [2021-06-05 05:17:14,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696747547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:14,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353203351] [2021-06-05 05:17:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:15,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:15,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:15,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:15,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:15,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353203351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:15,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:15,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:15,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221599968] [2021-06-05 05:17:15,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:15,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:15,230 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:15,811 INFO L93 Difference]: Finished difference Result 4039 states and 16830 transitions. [2021-06-05 05:17:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:17:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:15,820 INFO L225 Difference]: With dead ends: 4039 [2021-06-05 05:17:15,820 INFO L226 Difference]: Without dead ends: 4018 [2021-06-05 05:17:15,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-06-05 05:17:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3792. [2021-06-05 05:17:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 05:17:15,875 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 05:17:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:15,875 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 05:17:15,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 05:17:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:15,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:15,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:16,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:16,081 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash 131673669, now seen corresponding path program 170 times [2021-06-05 05:17:16,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:16,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929776455] [2021-06-05 05:17:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929776455] [2021-06-05 05:17:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929776455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261661519] [2021-06-05 05:17:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:16,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:16,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:16,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:16,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:16,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:16,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:16,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:16,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:16,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261661519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:16,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:16,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116802652] [2021-06-05 05:17:16,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:16,415 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:17,041 INFO L93 Difference]: Finished difference Result 4359 states and 18104 transitions. [2021-06-05 05:17:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:17:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:17,050 INFO L225 Difference]: With dead ends: 4359 [2021-06-05 05:17:17,050 INFO L226 Difference]: Without dead ends: 4328 [2021-06-05 05:17:17,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:17:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-06-05 05:17:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 3796. [2021-06-05 05:17:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.190777338603426) internal successors, (15904), 3795 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15904 transitions. [2021-06-05 05:17:17,107 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15904 transitions. Word has length 23 [2021-06-05 05:17:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:17,108 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15904 transitions. [2021-06-05 05:17:17,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15904 transitions. [2021-06-05 05:17:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:17,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:17,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:17,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:17,314 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1171909467, now seen corresponding path program 171 times [2021-06-05 05:17:17,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:17,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711566485] [2021-06-05 05:17:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:17,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:17,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711566485] [2021-06-05 05:17:17,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711566485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416563898] [2021-06-05 05:17:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:17,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:17,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:17,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:17,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:17,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:17,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:17,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:17,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:17,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416563898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:17,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737111608] [2021-06-05 05:17:17,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:17,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:17,667 INFO L87 Difference]: Start difference. First operand 3796 states and 15904 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:18,482 INFO L93 Difference]: Finished difference Result 4229 states and 17589 transitions. [2021-06-05 05:17:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:17:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:18,491 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 05:17:18,491 INFO L226 Difference]: Without dead ends: 4204 [2021-06-05 05:17:18,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-06-05 05:17:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3800. [2021-06-05 05:17:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.190576467491445) internal successors, (15920), 3799 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15920 transitions. [2021-06-05 05:17:18,574 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15920 transitions. Word has length 23 [2021-06-05 05:17:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:18,574 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15920 transitions. [2021-06-05 05:17:18,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15920 transitions. [2021-06-05 05:17:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:18,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:18,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:18,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-06-05 05:17:18,781 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 159216935, now seen corresponding path program 172 times [2021-06-05 05:17:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:18,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720147046] [2021-06-05 05:17:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:18,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:18,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720147046] [2021-06-05 05:17:18,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720147046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:18,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155622397] [2021-06-05 05:17:18,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:18,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:19,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:19,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:19,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155622397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:19,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:19,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738932713] [2021-06-05 05:17:19,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:19,110 INFO L87 Difference]: Start difference. First operand 3800 states and 15920 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:19,847 INFO L93 Difference]: Finished difference Result 4273 states and 17756 transitions. [2021-06-05 05:17:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:17:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:19,856 INFO L225 Difference]: With dead ends: 4273 [2021-06-05 05:17:19,856 INFO L226 Difference]: Without dead ends: 4252 [2021-06-05 05:17:19,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 682.8ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:17:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-06-05 05:17:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 3792. [2021-06-05 05:17:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 05:17:19,912 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 05:17:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:19,913 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 05:17:19,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 05:17:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:19,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:19,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:20,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:20,118 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1986304985, now seen corresponding path program 173 times [2021-06-05 05:17:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:20,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500020868] [2021-06-05 05:17:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500020868] [2021-06-05 05:17:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500020868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968244492] [2021-06-05 05:17:20,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:20,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:20,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:20,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:20,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:20,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:20,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:20,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:20,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968244492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:20,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:20,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:20,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894495591] [2021-06-05 05:17:20,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:20,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:20,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:20,433 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:21,024 INFO L93 Difference]: Finished difference Result 4075 states and 16982 transitions. [2021-06-05 05:17:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:17:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:21,033 INFO L225 Difference]: With dead ends: 4075 [2021-06-05 05:17:21,033 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 05:17:21,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:17:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 05:17:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3796. [2021-06-05 05:17:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.190777338603426) internal successors, (15904), 3795 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15904 transitions. [2021-06-05 05:17:21,089 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15904 transitions. Word has length 23 [2021-06-05 05:17:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:21,089 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15904 transitions. [2021-06-05 05:17:21,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15904 transitions. [2021-06-05 05:17:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:21,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:21,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:21,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:21,296 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1400971033, now seen corresponding path program 174 times [2021-06-05 05:17:21,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:21,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022715391] [2021-06-05 05:17:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:21,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022715391] [2021-06-05 05:17:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022715391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334032771] [2021-06-05 05:17:21,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:21,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:21,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:21,547 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:21,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:17:21,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:21,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:21,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:21,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:17:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334032771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:21,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:21,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:17:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879147343] [2021-06-05 05:17:21,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:21,663 INFO L87 Difference]: Start difference. First operand 3796 states and 15904 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:22,341 INFO L93 Difference]: Finished difference Result 4077 states and 16978 transitions. [2021-06-05 05:17:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:17:22,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:22,350 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 05:17:22,350 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 05:17:22,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 05:17:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3800. [2021-06-05 05:17:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.190576467491445) internal successors, (15920), 3799 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15920 transitions. [2021-06-05 05:17:22,408 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15920 transitions. Word has length 23 [2021-06-05 05:17:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:22,408 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15920 transitions. [2021-06-05 05:17:22,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15920 transitions. [2021-06-05 05:17:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:22,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:22,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:22,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:22,615 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash 212595701, now seen corresponding path program 175 times [2021-06-05 05:17:22,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:22,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668013963] [2021-06-05 05:17:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:22,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:22,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668013963] [2021-06-05 05:17:22,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668013963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:22,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497341569] [2021-06-05 05:17:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:22,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:22,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:22,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:22,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:22,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:22,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:22,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:22,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497341569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:22,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:22,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:22,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420306451] [2021-06-05 05:17:22,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:22,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:22,941 INFO L87 Difference]: Start difference. First operand 3800 states and 15920 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:23,491 INFO L93 Difference]: Finished difference Result 4013 states and 16724 transitions. [2021-06-05 05:17:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:17:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:23,500 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 05:17:23,500 INFO L226 Difference]: Without dead ends: 3992 [2021-06-05 05:17:23,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:17:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-06-05 05:17:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3792. [2021-06-05 05:17:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 05:17:23,557 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 05:17:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:23,557 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 05:17:23,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 05:17:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:23,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:23,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:23,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:23,763 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash -343292505, now seen corresponding path program 176 times [2021-06-05 05:17:23,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:23,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106254135] [2021-06-05 05:17:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:23,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106254135] [2021-06-05 05:17:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106254135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039038585] [2021-06-05 05:17:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:23,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:23,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:23,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:23,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:24,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:24,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039038585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:24,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:24,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847460080] [2021-06-05 05:17:24,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:24,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:24,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:24,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:24,122 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:24,785 INFO L93 Difference]: Finished difference Result 4089 states and 17033 transitions. [2021-06-05 05:17:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:17:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:24,794 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 05:17:24,794 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 05:17:24,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:17:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 05:17:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3801. [2021-06-05 05:17:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 4.1889473684210525) internal successors, (15918), 3800 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 15918 transitions. [2021-06-05 05:17:24,850 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 15918 transitions. Word has length 23 [2021-06-05 05:17:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:24,850 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 15918 transitions. [2021-06-05 05:17:24,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 15918 transitions. [2021-06-05 05:17:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:24,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:24,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:25,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 05:17:25,057 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1384868573, now seen corresponding path program 177 times [2021-06-05 05:17:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:25,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794587451] [2021-06-05 05:17:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:25,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794587451] [2021-06-05 05:17:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794587451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274007456] [2021-06-05 05:17:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:25,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:25,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:25,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:25,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:25,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:25,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:25,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:25,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:25,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274007456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:25,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:25,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:25,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458692646] [2021-06-05 05:17:25,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:25,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:25,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:25,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:25,443 INFO L87 Difference]: Start difference. First operand 3801 states and 15918 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:26,097 INFO L93 Difference]: Finished difference Result 4036 states and 16822 transitions. [2021-06-05 05:17:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:17:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:26,106 INFO L225 Difference]: With dead ends: 4036 [2021-06-05 05:17:26,106 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 05:17:26,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 05:17:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3794. [2021-06-05 05:17:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 05:17:26,166 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 05:17:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:26,166 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 05:17:26,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 05:17:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:26,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:26,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:26,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:26,373 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1671989925, now seen corresponding path program 178 times [2021-06-05 05:17:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:26,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109806254] [2021-06-05 05:17:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:26,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109806254] [2021-06-05 05:17:26,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109806254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018878359] [2021-06-05 05:17:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:26,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:26,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:26,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:26,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:26,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:26,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:26,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:26,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018878359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:26,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:26,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433043113] [2021-06-05 05:17:26,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:26,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:26,714 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:27,302 INFO L93 Difference]: Finished difference Result 4000 states and 16671 transitions. [2021-06-05 05:17:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:17:27,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:27,311 INFO L225 Difference]: With dead ends: 4000 [2021-06-05 05:17:27,311 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 05:17:27,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:17:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 05:17:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3798. [2021-06-05 05:17:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 05:17:27,370 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 05:17:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:27,371 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 05:17:27,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 05:17:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:27,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:27,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:27,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-06-05 05:17:27,577 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2129759985, now seen corresponding path program 179 times [2021-06-05 05:17:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:27,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278969720] [2021-06-05 05:17:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:27,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278969720] [2021-06-05 05:17:27,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278969720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323488412] [2021-06-05 05:17:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:27,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:27,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:27,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:27,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:27,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:27,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:27,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:27,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:27,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323488412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:27,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:27,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315200931] [2021-06-05 05:17:27,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:27,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:27,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:27,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:27,929 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:28,446 INFO L93 Difference]: Finished difference Result 3986 states and 16616 transitions. [2021-06-05 05:17:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:17:28,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:28,454 INFO L225 Difference]: With dead ends: 3986 [2021-06-05 05:17:28,454 INFO L226 Difference]: Without dead ends: 3965 [2021-06-05 05:17:28,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2021-06-05 05:17:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 3794. [2021-06-05 05:17:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 05:17:28,511 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 05:17:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:28,511 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 05:17:28,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 05:17:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:28,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:28,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:28,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:28,717 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:28,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:28,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1230431055, now seen corresponding path program 180 times [2021-06-05 05:17:28,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:28,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662368655] [2021-06-05 05:17:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:28,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:28,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662368655] [2021-06-05 05:17:28,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662368655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:28,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723035707] [2021-06-05 05:17:28,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:28,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:28,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:28,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:28,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 05:17:28,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:28,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:28,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:28,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:32 [2021-06-05 05:17:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:29,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723035707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:29,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:29,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999529025] [2021-06-05 05:17:29,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:29,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:29,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:29,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:29,055 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:29,454 INFO L93 Difference]: Finished difference Result 3923 states and 16367 transitions. [2021-06-05 05:17:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:17:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:29,462 INFO L225 Difference]: With dead ends: 3923 [2021-06-05 05:17:29,462 INFO L226 Difference]: Without dead ends: 3898 [2021-06-05 05:17:29,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-06-05 05:17:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3798. [2021-06-05 05:17:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 05:17:29,512 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 05:17:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:29,512 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 05:17:29,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 05:17:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:29,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:29,517 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:29,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-06-05 05:17:29,718 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:29,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2051843709, now seen corresponding path program 181 times [2021-06-05 05:17:29,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:29,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701350386] [2021-06-05 05:17:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:29,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:29,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701350386] [2021-06-05 05:17:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701350386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458206911] [2021-06-05 05:17:29,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:29,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:29,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:29,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:29,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:29,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:29,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:29,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:17:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:30,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458206911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:30,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:30,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960877983] [2021-06-05 05:17:30,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:30,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:30,064 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:30,625 INFO L93 Difference]: Finished difference Result 3973 states and 16564 transitions. [2021-06-05 05:17:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:17:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:30,633 INFO L225 Difference]: With dead ends: 3973 [2021-06-05 05:17:30,633 INFO L226 Difference]: Without dead ends: 3952 [2021-06-05 05:17:30,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-06-05 05:17:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3790. [2021-06-05 05:17:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.1902876748482445) internal successors, (15877), 3789 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15877 transitions. [2021-06-05 05:17:30,681 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15877 transitions. Word has length 23 [2021-06-05 05:17:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:30,681 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15877 transitions. [2021-06-05 05:17:30,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15877 transitions. [2021-06-05 05:17:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:30,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:30,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:30,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:30,886 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1035728603, now seen corresponding path program 182 times [2021-06-05 05:17:30,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:30,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205202713] [2021-06-05 05:17:30,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:30,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205202713] [2021-06-05 05:17:30,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205202713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985595724] [2021-06-05 05:17:30,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:31,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:31,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:31,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:31,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:31,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:31,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:31,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:31,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:31,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985595724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:31,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:31,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678802401] [2021-06-05 05:17:31,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:31,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:31,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:31,196 INFO L87 Difference]: Start difference. First operand 3790 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:31,874 INFO L93 Difference]: Finished difference Result 4093 states and 17042 transitions. [2021-06-05 05:17:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:17:31,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:31,882 INFO L225 Difference]: With dead ends: 4093 [2021-06-05 05:17:31,882 INFO L226 Difference]: Without dead ends: 4071 [2021-06-05 05:17:31,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:17:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-06-05 05:17:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3798. [2021-06-05 05:17:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190413484329734) internal successors, (15911), 3797 states have internal predecessors, (15911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15911 transitions. [2021-06-05 05:17:31,934 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15911 transitions. Word has length 23 [2021-06-05 05:17:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:31,935 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15911 transitions. [2021-06-05 05:17:31,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15911 transitions. [2021-06-05 05:17:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:31,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:31,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:32,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 05:17:32,140 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1621062555, now seen corresponding path program 183 times [2021-06-05 05:17:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:32,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841029761] [2021-06-05 05:17:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:32,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:32,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841029761] [2021-06-05 05:17:32,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841029761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:32,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24700032] [2021-06-05 05:17:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:32,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:32,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:32,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:32,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:32,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:17:32,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:32,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:32,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:32,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:17:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:32,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24700032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:32,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:32,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040594695] [2021-06-05 05:17:32,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:32,444 INFO L87 Difference]: Start difference. First operand 3798 states and 15911 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:32,978 INFO L93 Difference]: Finished difference Result 4064 states and 16898 transitions. [2021-06-05 05:17:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:17:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:32,986 INFO L225 Difference]: With dead ends: 4064 [2021-06-05 05:17:32,986 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 05:17:32,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:17:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 05:17:33,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3802. [2021-06-05 05:17:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.190213101815312) internal successors, (15927), 3801 states have internal predecessors, (15927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15927 transitions. [2021-06-05 05:17:33,038 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15927 transitions. Word has length 23 [2021-06-05 05:17:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:33,039 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15927 transitions. [2021-06-05 05:17:33,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15927 transitions. [2021-06-05 05:17:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:33,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:33,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:33,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 05:17:33,244 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1060338007, now seen corresponding path program 184 times [2021-06-05 05:17:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:33,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362827435] [2021-06-05 05:17:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:33,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:33,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362827435] [2021-06-05 05:17:33,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362827435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:33,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982650507] [2021-06-05 05:17:33,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:33,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:33,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:33,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:33,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:33,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:33,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:33,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:33,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:33,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982650507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:33,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:33,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:33,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917045077] [2021-06-05 05:17:33,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:33,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:33,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:33,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:33,566 INFO L87 Difference]: Start difference. First operand 3802 states and 15927 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:34,174 INFO L93 Difference]: Finished difference Result 4028 states and 16778 transitions. [2021-06-05 05:17:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:17:34,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:34,183 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 05:17:34,183 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 05:17:34,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:17:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 05:17:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3794. [2021-06-05 05:17:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190087002372792) internal successors, (15893), 3793 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15893 transitions. [2021-06-05 05:17:34,241 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15893 transitions. Word has length 23 [2021-06-05 05:17:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:34,241 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15893 transitions. [2021-06-05 05:17:34,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15893 transitions. [2021-06-05 05:17:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:34,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:34,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:34,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:34,448 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash -499776783, now seen corresponding path program 185 times [2021-06-05 05:17:34,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:34,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766810369] [2021-06-05 05:17:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:34,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766810369] [2021-06-05 05:17:34,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766810369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921404347] [2021-06-05 05:17:34,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:34,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:34,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:34,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:34,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:34,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:34,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:34,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:34,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921404347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:34,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:34,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603607737] [2021-06-05 05:17:34,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:34,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:34,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:34,802 INFO L87 Difference]: Start difference. First operand 3794 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:35,424 INFO L93 Difference]: Finished difference Result 4036 states and 16825 transitions. [2021-06-05 05:17:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:17:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:35,433 INFO L225 Difference]: With dead ends: 4036 [2021-06-05 05:17:35,433 INFO L226 Difference]: Without dead ends: 4013 [2021-06-05 05:17:35,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-06-05 05:17:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 3790. [2021-06-05 05:17:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.1902876748482445) internal successors, (15877), 3789 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15877 transitions. [2021-06-05 05:17:35,491 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15877 transitions. Word has length 23 [2021-06-05 05:17:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:35,491 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15877 transitions. [2021-06-05 05:17:35,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15877 transitions. [2021-06-05 05:17:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:35,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:35,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:35,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:35,698 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 172040369, now seen corresponding path program 186 times [2021-06-05 05:17:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:35,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603420782] [2021-06-05 05:17:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:35,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:35,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603420782] [2021-06-05 05:17:35,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603420782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:35,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156616684] [2021-06-05 05:17:35,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:35,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:35,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:35,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:35,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:35,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:35,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:35,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:35,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:35,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:36,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156616684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:36,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:36,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684120031] [2021-06-05 05:17:36,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:36,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:36,010 INFO L87 Difference]: Start difference. First operand 3790 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:36,617 INFO L93 Difference]: Finished difference Result 4207 states and 17506 transitions. [2021-06-05 05:17:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:17:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:36,626 INFO L225 Difference]: With dead ends: 4207 [2021-06-05 05:17:36,626 INFO L226 Difference]: Without dead ends: 4185 [2021-06-05 05:17:36,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:17:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-06-05 05:17:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3798. [2021-06-05 05:17:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190413484329734) internal successors, (15911), 3797 states have internal predecessors, (15911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15911 transitions. [2021-06-05 05:17:36,686 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15911 transitions. Word has length 23 [2021-06-05 05:17:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:36,686 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15911 transitions. [2021-06-05 05:17:36,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15911 transitions. [2021-06-05 05:17:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:36,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:36,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:36,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 05:17:36,893 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 685567221, now seen corresponding path program 187 times [2021-06-05 05:17:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:36,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127720379] [2021-06-05 05:17:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:36,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:36,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127720379] [2021-06-05 05:17:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127720379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:36,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342811531] [2021-06-05 05:17:36,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:37,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:37,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:37,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:37,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:37,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:37,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:37,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342811531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:37,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:37,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:37,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121911155] [2021-06-05 05:17:37,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:37,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:37,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:37,216 INFO L87 Difference]: Start difference. First operand 3798 states and 15911 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:38,003 INFO L93 Difference]: Finished difference Result 4110 states and 17112 transitions. [2021-06-05 05:17:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:17:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:38,012 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 05:17:38,012 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 05:17:38,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:17:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 05:17:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3802. [2021-06-05 05:17:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.190213101815312) internal successors, (15927), 3801 states have internal predecessors, (15927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15927 transitions. [2021-06-05 05:17:38,069 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15927 transitions. Word has length 23 [2021-06-05 05:17:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:38,069 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15927 transitions. [2021-06-05 05:17:38,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15927 transitions. [2021-06-05 05:17:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:38,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:38,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:38,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:38,276 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:38,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1761278377, now seen corresponding path program 188 times [2021-06-05 05:17:38,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:38,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616931667] [2021-06-05 05:17:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:38,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:38,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616931667] [2021-06-05 05:17:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616931667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:38,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712146283] [2021-06-05 05:17:38,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:38,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:38,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:38,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:38,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:38,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:38,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:38,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:38,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712146283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:38,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:38,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:38,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635943278] [2021-06-05 05:17:38,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:38,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:38,623 INFO L87 Difference]: Start difference. First operand 3802 states and 15927 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:39,310 INFO L93 Difference]: Finished difference Result 4079 states and 16992 transitions. [2021-06-05 05:17:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:17:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:39,318 INFO L225 Difference]: With dead ends: 4079 [2021-06-05 05:17:39,319 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 05:17:39,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:17:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 05:17:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3794. [2021-06-05 05:17:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190087002372792) internal successors, (15893), 3793 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15893 transitions. [2021-06-05 05:17:39,372 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15893 transitions. Word has length 23 [2021-06-05 05:17:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:39,372 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15893 transitions. [2021-06-05 05:17:39,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15893 transitions. [2021-06-05 05:17:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:39,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:39,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:39,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-06-05 05:17:39,578 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:39,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1932093309, now seen corresponding path program 189 times [2021-06-05 05:17:39,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:39,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871587692] [2021-06-05 05:17:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:39,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:39,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871587692] [2021-06-05 05:17:39,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871587692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:39,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469266178] [2021-06-05 05:17:39,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:39,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:39,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:39,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:39,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:39,888 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:17:39,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 05:17:39,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:39,915 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 05:17:39,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:39,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 05:17:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:39,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469266178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:39,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:39,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:17:39,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197343286] [2021-06-05 05:17:39,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:39,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:39,980 INFO L87 Difference]: Start difference. First operand 3794 states and 15893 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:40,876 INFO L93 Difference]: Finished difference Result 4142 states and 17255 transitions. [2021-06-05 05:17:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:40,885 INFO L225 Difference]: With dead ends: 4142 [2021-06-05 05:17:40,885 INFO L226 Difference]: Without dead ends: 4119 [2021-06-05 05:17:40,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:17:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-06-05 05:17:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3788. [2021-06-05 05:17:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.190388170055453) internal successors, (15869), 3787 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15869 transitions. [2021-06-05 05:17:40,975 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15869 transitions. Word has length 23 [2021-06-05 05:17:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:40,975 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15869 transitions. [2021-06-05 05:17:40,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15869 transitions. [2021-06-05 05:17:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:40,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:40,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:41,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:41,182 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash 695325603, now seen corresponding path program 190 times [2021-06-05 05:17:41,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:41,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226082625] [2021-06-05 05:17:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:41,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226082625] [2021-06-05 05:17:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226082625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255320988] [2021-06-05 05:17:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:41,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:41,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:41,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:41,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:41,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:41,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:41,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:41,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255320988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:41,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:41,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:41,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188349052] [2021-06-05 05:17:41,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:41,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:41,494 INFO L87 Difference]: Start difference. First operand 3788 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:42,142 INFO L93 Difference]: Finished difference Result 4480 states and 18590 transitions. [2021-06-05 05:17:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:17:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:42,150 INFO L225 Difference]: With dead ends: 4480 [2021-06-05 05:17:42,151 INFO L226 Difference]: Without dead ends: 4458 [2021-06-05 05:17:42,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:17:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2021-06-05 05:17:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 3796. [2021-06-05 05:17:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.189723320158103) internal successors, (15900), 3795 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15900 transitions. [2021-06-05 05:17:42,206 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15900 transitions. Word has length 23 [2021-06-05 05:17:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:42,206 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15900 transitions. [2021-06-05 05:17:42,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15900 transitions. [2021-06-05 05:17:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:42,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:42,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:42,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 05:17:42,413 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1208852455, now seen corresponding path program 191 times [2021-06-05 05:17:42,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:42,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325123021] [2021-06-05 05:17:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:42,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325123021] [2021-06-05 05:17:42,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325123021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209502864] [2021-06-05 05:17:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:42,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:42,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:42,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:42,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:42,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:42,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:42,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209502864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:42,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:42,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942107937] [2021-06-05 05:17:42,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:42,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:42,739 INFO L87 Difference]: Start difference. First operand 3796 states and 15900 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:43,746 INFO L93 Difference]: Finished difference Result 4349 states and 18055 transitions. [2021-06-05 05:17:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:43,756 INFO L225 Difference]: With dead ends: 4349 [2021-06-05 05:17:43,756 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 05:17:43,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 761.1ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 05:17:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3800. [2021-06-05 05:17:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.189523558831271) internal successors, (15916), 3799 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15916 transitions. [2021-06-05 05:17:43,811 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15916 transitions. Word has length 23 [2021-06-05 05:17:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:43,811 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15916 transitions. [2021-06-05 05:17:43,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15916 transitions. [2021-06-05 05:17:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:43,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:43,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:44,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:44,017 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2010403685, now seen corresponding path program 192 times [2021-06-05 05:17:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:44,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439461466] [2021-06-05 05:17:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:44,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:44,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439461466] [2021-06-05 05:17:44,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439461466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:44,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856662056] [2021-06-05 05:17:44,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:44,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:17:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:44,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:44,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:44,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:44,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:44,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:44,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856662056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:44,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:44,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405360359] [2021-06-05 05:17:44,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:44,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:44,370 INFO L87 Difference]: Start difference. First operand 3800 states and 15916 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:45,270 INFO L93 Difference]: Finished difference Result 4303 states and 17878 transitions. [2021-06-05 05:17:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:17:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:45,278 INFO L225 Difference]: With dead ends: 4303 [2021-06-05 05:17:45,279 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 05:17:45,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 05:17:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3792. [2021-06-05 05:17:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.189395937747296) internal successors, (15882), 3791 states have internal predecessors, (15882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15882 transitions. [2021-06-05 05:17:45,332 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15882 transitions. Word has length 23 [2021-06-05 05:17:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:45,332 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15882 transitions. [2021-06-05 05:17:45,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15882 transitions. [2021-06-05 05:17:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:45,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:45,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:45,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 05:17:45,538 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1104833101, now seen corresponding path program 193 times [2021-06-05 05:17:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:45,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638697129] [2021-06-05 05:17:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:45,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:45,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638697129] [2021-06-05 05:17:45,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638697129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670823993] [2021-06-05 05:17:45,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:45,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:45,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:45,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670823993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:45,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245734886] [2021-06-05 05:17:45,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:45,853 INFO L87 Difference]: Start difference. First operand 3792 states and 15882 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:46,779 INFO L93 Difference]: Finished difference Result 4528 states and 18743 transitions. [2021-06-05 05:17:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:17:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:46,788 INFO L225 Difference]: With dead ends: 4528 [2021-06-05 05:17:46,788 INFO L226 Difference]: Without dead ends: 4497 [2021-06-05 05:17:46,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:17:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2021-06-05 05:17:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3790. [2021-06-05 05:17:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.186064924782264) internal successors, (15861), 3789 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15861 transitions. [2021-06-05 05:17:46,843 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15861 transitions. Word has length 23 [2021-06-05 05:17:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:46,844 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15861 transitions. [2021-06-05 05:17:46,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15861 transitions. [2021-06-05 05:17:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:46,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:46,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:47,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:47,050 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1692578423, now seen corresponding path program 194 times [2021-06-05 05:17:47,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:47,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644225448] [2021-06-05 05:17:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:47,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:47,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644225448] [2021-06-05 05:17:47,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644225448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:47,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299578855] [2021-06-05 05:17:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:47,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:47,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:47,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:47,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:47,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:47,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:47,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299578855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:47,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:47,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:47,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599515024] [2021-06-05 05:17:47,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:47,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:47,375 INFO L87 Difference]: Start difference. First operand 3790 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:48,261 INFO L93 Difference]: Finished difference Result 4303 states and 17861 transitions. [2021-06-05 05:17:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:48,270 INFO L225 Difference]: With dead ends: 4303 [2021-06-05 05:17:48,271 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 05:17:48,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 05:17:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3794. [2021-06-05 05:17:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.18586870551015) internal successors, (15877), 3793 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15877 transitions. [2021-06-05 05:17:48,331 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15877 transitions. Word has length 23 [2021-06-05 05:17:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:48,331 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15877 transitions. [2021-06-05 05:17:48,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15877 transitions. [2021-06-05 05:17:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:48,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:48,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:48,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:48,537 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1526677717, now seen corresponding path program 195 times [2021-06-05 05:17:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:48,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182610453] [2021-06-05 05:17:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:48,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:48,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182610453] [2021-06-05 05:17:48,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182610453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:48,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867453522] [2021-06-05 05:17:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:48,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:48,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:48,791 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:17:48,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:48,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:48,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:48,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:17:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:48,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867453522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:48,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:48,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:17:48,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680388577] [2021-06-05 05:17:48,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:48,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:48,898 INFO L87 Difference]: Start difference. First operand 3794 states and 15877 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:49,957 INFO L93 Difference]: Finished difference Result 4402 states and 18269 transitions. [2021-06-05 05:17:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:49,966 INFO L225 Difference]: With dead ends: 4402 [2021-06-05 05:17:49,967 INFO L226 Difference]: Without dead ends: 4381 [2021-06-05 05:17:49,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-06-05 05:17:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3792. [2021-06-05 05:17:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.183065154312846) internal successors, (15858), 3791 states have internal predecessors, (15858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15858 transitions. [2021-06-05 05:17:50,045 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15858 transitions. Word has length 23 [2021-06-05 05:17:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:50,046 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15858 transitions. [2021-06-05 05:17:50,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15858 transitions. [2021-06-05 05:17:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:50,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:50,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:50,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 05:17:50,269 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash -365452487, now seen corresponding path program 196 times [2021-06-05 05:17:50,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:50,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260991036] [2021-06-05 05:17:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:50,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260991036] [2021-06-05 05:17:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260991036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:50,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731263193] [2021-06-05 05:17:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:50,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:50,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:50,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:50,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:50,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:50,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:50,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:50,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731263193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:50,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977036459] [2021-06-05 05:17:50,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:50,585 INFO L87 Difference]: Start difference. First operand 3792 states and 15858 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:51,223 INFO L93 Difference]: Finished difference Result 4373 states and 18151 transitions. [2021-06-05 05:17:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:17:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:51,233 INFO L225 Difference]: With dead ends: 4373 [2021-06-05 05:17:51,233 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 05:17:51,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:17:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 05:17:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3800. [2021-06-05 05:17:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.183206106870229) internal successors, (15892), 3799 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15892 transitions. [2021-06-05 05:17:51,293 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15892 transitions. Word has length 23 [2021-06-05 05:17:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:51,293 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15892 transitions. [2021-06-05 05:17:51,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15892 transitions. [2021-06-05 05:17:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:51,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:51,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:51,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 05:17:51,500 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash 148074365, now seen corresponding path program 197 times [2021-06-05 05:17:51,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:51,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540375998] [2021-06-05 05:17:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:51,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:51,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540375998] [2021-06-05 05:17:51,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540375998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:51,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366998675] [2021-06-05 05:17:51,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:51,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:51,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:51,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:51,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:51,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:51,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:51,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:51,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:51,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:51,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:51,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366998675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:51,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:51,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:51,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100304211] [2021-06-05 05:17:51,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:51,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:51,839 INFO L87 Difference]: Start difference. First operand 3800 states and 15892 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:52,704 INFO L93 Difference]: Finished difference Result 4247 states and 17633 transitions. [2021-06-05 05:17:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:17:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:52,713 INFO L225 Difference]: With dead ends: 4247 [2021-06-05 05:17:52,713 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 05:17:52,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 743.8ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 05:17:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3804. [2021-06-05 05:17:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.183013410465422) internal successors, (15908), 3803 states have internal predecessors, (15908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15908 transitions. [2021-06-05 05:17:52,774 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15908 transitions. Word has length 23 [2021-06-05 05:17:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:52,775 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15908 transitions. [2021-06-05 05:17:52,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15908 transitions. [2021-06-05 05:17:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:52,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:52,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:52,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:52,981 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1223785521, now seen corresponding path program 198 times [2021-06-05 05:17:52,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:52,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656532399] [2021-06-05 05:17:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:53,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656532399] [2021-06-05 05:17:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656532399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853612525] [2021-06-05 05:17:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:53,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:17:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:53,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:53,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:53,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:53,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:53,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:53,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:53,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853612525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:53,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:53,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:53,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812579580] [2021-06-05 05:17:53,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:53,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:53,311 INFO L87 Difference]: Start difference. First operand 3804 states and 15908 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:54,150 INFO L93 Difference]: Finished difference Result 4202 states and 17460 transitions. [2021-06-05 05:17:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:17:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:54,159 INFO L225 Difference]: With dead ends: 4202 [2021-06-05 05:17:54,159 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 05:17:54,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:17:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 05:17:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3796. [2021-06-05 05:17:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.182872200263505) internal successors, (15874), 3795 states have internal predecessors, (15874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15874 transitions. [2021-06-05 05:17:54,213 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15874 transitions. Word has length 23 [2021-06-05 05:17:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:54,213 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15874 transitions. [2021-06-05 05:17:54,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15874 transitions. [2021-06-05 05:17:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:54,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:54,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:54,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:54,418 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:54,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1394600453, now seen corresponding path program 199 times [2021-06-05 05:17:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:54,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931647951] [2021-06-05 05:17:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931647951] [2021-06-05 05:17:54,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931647951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102250174] [2021-06-05 05:17:54,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:54,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:54,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:54,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:54,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:54,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102250174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:54,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:54,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513840591] [2021-06-05 05:17:54,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:54,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:54,731 INFO L87 Difference]: Start difference. First operand 3796 states and 15874 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:55,255 INFO L93 Difference]: Finished difference Result 4161 states and 17301 transitions. [2021-06-05 05:17:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:17:55,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:55,264 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 05:17:55,264 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 05:17:55,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 05:17:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3788. [2021-06-05 05:17:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.182730393451281) internal successors, (15840), 3787 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15840 transitions. [2021-06-05 05:17:55,324 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15840 transitions. Word has length 23 [2021-06-05 05:17:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:55,324 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15840 transitions. [2021-06-05 05:17:55,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15840 transitions. [2021-06-05 05:17:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:55,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:55,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:55,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:55,531 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash 573027889, now seen corresponding path program 200 times [2021-06-05 05:17:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:55,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369943100] [2021-06-05 05:17:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:55,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:55,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369943100] [2021-06-05 05:17:55,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369943100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:55,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599234149] [2021-06-05 05:17:55,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:55,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:55,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:55,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:55,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:55,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:55,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:55,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:55,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:55,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:17:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599234149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:55,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359623168] [2021-06-05 05:17:55,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:55,842 INFO L87 Difference]: Start difference. First operand 3788 states and 15840 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:56,690 INFO L93 Difference]: Finished difference Result 4652 states and 19252 transitions. [2021-06-05 05:17:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:17:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:56,700 INFO L225 Difference]: With dead ends: 4652 [2021-06-05 05:17:56,700 INFO L226 Difference]: Without dead ends: 4630 [2021-06-05 05:17:56,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:17:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-06-05 05:17:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3804. [2021-06-05 05:17:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.1851170128845645) internal successors, (15916), 3803 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15916 transitions. [2021-06-05 05:17:56,764 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15916 transitions. Word has length 23 [2021-06-05 05:17:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:56,765 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15916 transitions. [2021-06-05 05:17:56,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15916 transitions. [2021-06-05 05:17:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:56,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:56,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:56,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 05:17:56,971 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1158361841, now seen corresponding path program 201 times [2021-06-05 05:17:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:56,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501054658] [2021-06-05 05:17:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:57,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:57,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501054658] [2021-06-05 05:17:57,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501054658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:57,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909910629] [2021-06-05 05:17:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:57,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:57,258 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:57,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:17:57,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:57,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:17:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:57,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909910629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:57,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:57,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:17:57,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412811190] [2021-06-05 05:17:57,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:57,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:57,377 INFO L87 Difference]: Start difference. First operand 3804 states and 15916 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:58,225 INFO L93 Difference]: Finished difference Result 4448 states and 18398 transitions. [2021-06-05 05:17:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:17:58,226 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:58,235 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 05:17:58,235 INFO L226 Difference]: Without dead ends: 4422 [2021-06-05 05:17:58,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:17:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2021-06-05 05:17:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 3808. [2021-06-05 05:17:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.184922511163646) internal successors, (15932), 3807 states have internal predecessors, (15932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15932 transitions. [2021-06-05 05:17:58,298 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15932 transitions. Word has length 23 [2021-06-05 05:17:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:58,298 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15932 transitions. [2021-06-05 05:17:58,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15932 transitions. [2021-06-05 05:17:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:58,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:58,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:58,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:58,505 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1523038721, now seen corresponding path program 202 times [2021-06-05 05:17:58,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:58,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311262793] [2021-06-05 05:17:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:58,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311262793] [2021-06-05 05:17:58,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311262793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763826823] [2021-06-05 05:17:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:58,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:58,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:58,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:58,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:58,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:58,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:58,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:17:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763826823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:17:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624203633] [2021-06-05 05:17:58,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:58,824 INFO L87 Difference]: Start difference. First operand 3808 states and 15932 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:59,634 INFO L93 Difference]: Finished difference Result 4478 states and 18535 transitions. [2021-06-05 05:17:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:17:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:17:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:59,643 INFO L225 Difference]: With dead ends: 4478 [2021-06-05 05:17:59,643 INFO L226 Difference]: Without dead ends: 4457 [2021-06-05 05:17:59,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 736.6ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:17:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2021-06-05 05:17:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 3800. [2021-06-05 05:17:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.18478546986049) internal successors, (15898), 3799 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15898 transitions. [2021-06-05 05:17:59,697 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15898 transitions. Word has length 23 [2021-06-05 05:17:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:59,698 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15898 transitions. [2021-06-05 05:17:59,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15898 transitions. [2021-06-05 05:17:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:17:59,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:59,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:59,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable779 [2021-06-05 05:17:59,903 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash 922525267, now seen corresponding path program 203 times [2021-06-05 05:17:59,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:59,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755367783] [2021-06-05 05:17:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:00,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:00,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755367783] [2021-06-05 05:18:00,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755367783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:00,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048266759] [2021-06-05 05:18:00,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:00,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:00,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:00,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:00,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:00,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:00,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:00,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:00,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048266759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:00,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:00,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:00,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187502075] [2021-06-05 05:18:00,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:00,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:00,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:00,213 INFO L87 Difference]: Start difference. First operand 3800 states and 15898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:01,041 INFO L93 Difference]: Finished difference Result 4701 states and 19407 transitions. [2021-06-05 05:18:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:18:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:01,051 INFO L225 Difference]: With dead ends: 4701 [2021-06-05 05:18:01,051 INFO L226 Difference]: Without dead ends: 4666 [2021-06-05 05:18:01,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 611.0ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:18:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-06-05 05:18:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3808. [2021-06-05 05:18:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.184922511163646) internal successors, (15932), 3807 states have internal predecessors, (15932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15932 transitions. [2021-06-05 05:18:01,108 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15932 transitions. Word has length 23 [2021-06-05 05:18:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:01,108 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15932 transitions. [2021-06-05 05:18:01,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15932 transitions. [2021-06-05 05:18:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:01,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:01,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:01,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:01,314 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:01,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1003924323, now seen corresponding path program 204 times [2021-06-05 05:18:01,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:01,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830794654] [2021-06-05 05:18:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:01,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:01,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830794654] [2021-06-05 05:18:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830794654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:01,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242763135] [2021-06-05 05:18:01,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:01,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:01,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:01,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:01,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:01,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 05:18:01,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:01,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:01,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:01,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:36 [2021-06-05 05:18:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:01,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242763135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:01,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:01,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:18:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653056867] [2021-06-05 05:18:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:18:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:01,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:18:01,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:18:01,626 INFO L87 Difference]: Start difference. First operand 3808 states and 15932 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:02,265 INFO L93 Difference]: Finished difference Result 4239 states and 17592 transitions. [2021-06-05 05:18:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:02,274 INFO L225 Difference]: With dead ends: 4239 [2021-06-05 05:18:02,274 INFO L226 Difference]: Without dead ends: 4213 [2021-06-05 05:18:02,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-06-05 05:18:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3812. [2021-06-05 05:18:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1847284177381265) internal successors, (15948), 3811 states have internal predecessors, (15948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15948 transitions. [2021-06-05 05:18:02,331 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15948 transitions. Word has length 23 [2021-06-05 05:18:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:02,331 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15948 transitions. [2021-06-05 05:18:02,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15948 transitions. [2021-06-05 05:18:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:02,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:02,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:02,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 05:18:02,538 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1677476239, now seen corresponding path program 205 times [2021-06-05 05:18:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:02,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629838317] [2021-06-05 05:18:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:02,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:02,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629838317] [2021-06-05 05:18:02,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629838317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023851117] [2021-06-05 05:18:02,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:02,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:02,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:02,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:02,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:02,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:02,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023851117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:02,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448920690] [2021-06-05 05:18:02,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:02,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:02,866 INFO L87 Difference]: Start difference. First operand 3812 states and 15948 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:03,667 INFO L93 Difference]: Finished difference Result 4410 states and 18271 transitions. [2021-06-05 05:18:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:18:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:03,677 INFO L225 Difference]: With dead ends: 4410 [2021-06-05 05:18:03,677 INFO L226 Difference]: Without dead ends: 4389 [2021-06-05 05:18:03,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2021-06-05 05:18:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 3806. [2021-06-05 05:18:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 4.185545335085414) internal successors, (15926), 3805 states have internal predecessors, (15926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 15926 transitions. [2021-06-05 05:18:03,737 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 15926 transitions. Word has length 23 [2021-06-05 05:18:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:03,737 INFO L482 AbstractCegarLoop]: Abstraction has 3806 states and 15926 transitions. [2021-06-05 05:18:03,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 15926 transitions. [2021-06-05 05:18:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:03,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:03,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:03,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:03,943 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1541226251, now seen corresponding path program 206 times [2021-06-05 05:18:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:03,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365498831] [2021-06-05 05:18:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:04,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:04,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365498831] [2021-06-05 05:18:04,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365498831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:04,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349949820] [2021-06-05 05:18:04,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:04,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:04,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:04,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:04,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:04,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:04,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:04,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349949820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:04,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51932437] [2021-06-05 05:18:04,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:04,261 INFO L87 Difference]: Start difference. First operand 3806 states and 15926 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:04,974 INFO L93 Difference]: Finished difference Result 4278 states and 17767 transitions. [2021-06-05 05:18:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:04,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:04,983 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 05:18:04,983 INFO L226 Difference]: Without dead ends: 4256 [2021-06-05 05:18:04,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:18:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-06-05 05:18:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3812. [2021-06-05 05:18:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1860404093413806) internal successors, (15953), 3811 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15953 transitions. [2021-06-05 05:18:05,037 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15953 transitions. Word has length 23 [2021-06-05 05:18:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:05,037 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15953 transitions. [2021-06-05 05:18:05,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15953 transitions. [2021-06-05 05:18:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:05,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:05,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:05,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 05:18:05,243 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:05,244 INFO L82 PathProgramCache]: Analyzing trace with hash -955892299, now seen corresponding path program 207 times [2021-06-05 05:18:05,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:05,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745538476] [2021-06-05 05:18:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:05,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745538476] [2021-06-05 05:18:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745538476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733622684] [2021-06-05 05:18:05,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:05,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:18:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:05,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:05,506 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:05,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 05:18:05,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:05,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:05,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:05,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 05:18:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:05,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733622684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:05,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:05,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304481852] [2021-06-05 05:18:05,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:05,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:05,631 INFO L87 Difference]: Start difference. First operand 3812 states and 15953 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:06,374 INFO L93 Difference]: Finished difference Result 4195 states and 17417 transitions. [2021-06-05 05:18:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:18:06,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:06,383 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 05:18:06,384 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 05:18:06,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:18:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 05:18:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3816. [2021-06-05 05:18:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 4.185845347313237) internal successors, (15969), 3815 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 15969 transitions. [2021-06-05 05:18:06,441 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 15969 transitions. Word has length 23 [2021-06-05 05:18:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:06,441 INFO L482 AbstractCegarLoop]: Abstraction has 3816 states and 15969 transitions. [2021-06-05 05:18:06,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 15969 transitions. [2021-06-05 05:18:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:06,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:06,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:06,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:06,648 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 657674435, now seen corresponding path program 208 times [2021-06-05 05:18:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:06,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112292058] [2021-06-05 05:18:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:06,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:06,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112292058] [2021-06-05 05:18:06,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112292058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:06,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087742510] [2021-06-05 05:18:06,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:06,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:06,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:06,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:06,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:06,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:06,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:06,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:06,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:07,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087742510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:07,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:07,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:07,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181302478] [2021-06-05 05:18:07,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:07,008 INFO L87 Difference]: Start difference. First operand 3816 states and 15969 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:07,981 INFO L93 Difference]: Finished difference Result 4199 states and 17433 transitions. [2021-06-05 05:18:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:18:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:07,991 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 05:18:07,991 INFO L226 Difference]: Without dead ends: 4178 [2021-06-05 05:18:07,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-06-05 05:18:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3808. [2021-06-05 05:18:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 05:18:08,054 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 05:18:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:08,054 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 05:18:08,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 05:18:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:08,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:08,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:08,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,261 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1768447631, now seen corresponding path program 209 times [2021-06-05 05:18:08,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:08,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089536253] [2021-06-05 05:18:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:08,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:08,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089536253] [2021-06-05 05:18:08,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089536253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:08,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834538809] [2021-06-05 05:18:08,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:08,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:08,516 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 05:18:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 05:18:08,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:08,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:08,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:08,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:29 [2021-06-05 05:18:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834538809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:08,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:08,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:08,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363353573] [2021-06-05 05:18:08,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:08,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:08,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:08,595 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:09,307 INFO L93 Difference]: Finished difference Result 4327 states and 17960 transitions. [2021-06-05 05:18:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:09,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:09,315 INFO L225 Difference]: With dead ends: 4327 [2021-06-05 05:18:09,315 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 05:18:09,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:18:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 05:18:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3812. [2021-06-05 05:18:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1860404093413806) internal successors, (15953), 3811 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15953 transitions. [2021-06-05 05:18:09,368 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15953 transitions. Word has length 23 [2021-06-05 05:18:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:09,368 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15953 transitions. [2021-06-05 05:18:09,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15953 transitions. [2021-06-05 05:18:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:09,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:09,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:09,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 05:18:09,574 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1254920779, now seen corresponding path program 210 times [2021-06-05 05:18:09,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:09,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350130437] [2021-06-05 05:18:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:09,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:09,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350130437] [2021-06-05 05:18:09,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350130437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:09,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559821286] [2021-06-05 05:18:09,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:09,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:09,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:09,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:09,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:09,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:09,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:09,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:09,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:09,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:09,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559821286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:09,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:09,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:09,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932481829] [2021-06-05 05:18:09,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:09,931 INFO L87 Difference]: Start difference. First operand 3812 states and 15953 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:10,626 INFO L93 Difference]: Finished difference Result 4262 states and 17680 transitions. [2021-06-05 05:18:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:18:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:10,635 INFO L225 Difference]: With dead ends: 4262 [2021-06-05 05:18:10,635 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 05:18:10,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:18:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 05:18:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3816. [2021-06-05 05:18:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 4.185845347313237) internal successors, (15969), 3815 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 15969 transitions. [2021-06-05 05:18:10,688 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 15969 transitions. Word has length 23 [2021-06-05 05:18:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:10,688 INFO L482 AbstractCegarLoop]: Abstraction has 3816 states and 15969 transitions. [2021-06-05 05:18:10,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 15969 transitions. [2021-06-05 05:18:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:10,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:10,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:10,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 05:18:10,894 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash -179209623, now seen corresponding path program 211 times [2021-06-05 05:18:10,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:10,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529776790] [2021-06-05 05:18:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:10,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:10,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529776790] [2021-06-05 05:18:10,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529776790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:10,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4328097] [2021-06-05 05:18:10,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:11,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:11,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:11,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:11,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:11,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:11,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4328097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:11,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:11,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013910365] [2021-06-05 05:18:11,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:11,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:11,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:11,212 INFO L87 Difference]: Start difference. First operand 3816 states and 15969 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:12,142 INFO L93 Difference]: Finished difference Result 4257 states and 17668 transitions. [2021-06-05 05:18:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:18:12,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:12,151 INFO L225 Difference]: With dead ends: 4257 [2021-06-05 05:18:12,152 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 05:18:12,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 05:18:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3808. [2021-06-05 05:18:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 05:18:12,213 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 05:18:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:12,213 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 05:18:12,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 05:18:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:12,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:12,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:12,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 05:18:12,420 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash 101786229, now seen corresponding path program 212 times [2021-06-05 05:18:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:12,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657143338] [2021-06-05 05:18:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:12,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657143338] [2021-06-05 05:18:12,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657143338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399764231] [2021-06-05 05:18:12,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:12,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:12,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:12,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:12,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:12,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:12,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:12,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:12,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399764231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:12,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:12,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919825982] [2021-06-05 05:18:12,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:12,784 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:13,406 INFO L93 Difference]: Finished difference Result 4175 states and 17333 transitions. [2021-06-05 05:18:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:18:13,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:13,416 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 05:18:13,416 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 05:18:13,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:18:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 05:18:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3817. [2021-06-05 05:18:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3817 states, 3816 states have (on average 4.184224318658281) internal successors, (15967), 3816 states have internal predecessors, (15967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3817 states to 3817 states and 15967 transitions. [2021-06-05 05:18:13,469 INFO L78 Accepts]: Start accepts. Automaton has 3817 states and 15967 transitions. Word has length 23 [2021-06-05 05:18:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:13,469 INFO L482 AbstractCegarLoop]: Abstraction has 3817 states and 15967 transitions. [2021-06-05 05:18:13,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3817 states and 15967 transitions. [2021-06-05 05:18:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:13,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:13,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:13,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:13,675 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash -939789839, now seen corresponding path program 213 times [2021-06-05 05:18:13,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:13,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118974142] [2021-06-05 05:18:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:13,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:13,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118974142] [2021-06-05 05:18:13,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118974142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:13,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422919061] [2021-06-05 05:18:13,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:13,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:13,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:13,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:13,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:13,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:13,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:13,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:14,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422919061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:14,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:14,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417742029] [2021-06-05 05:18:14,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:14,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:14,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:14,029 INFO L87 Difference]: Start difference. First operand 3817 states and 15967 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:14,622 INFO L93 Difference]: Finished difference Result 4135 states and 17177 transitions. [2021-06-05 05:18:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:18:14,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:14,631 INFO L225 Difference]: With dead ends: 4135 [2021-06-05 05:18:14,631 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 05:18:14,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:18:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 05:18:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3810. [2021-06-05 05:18:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.1856130217904965) internal successors, (15943), 3809 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15943 transitions. [2021-06-05 05:18:14,686 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15943 transitions. Word has length 23 [2021-06-05 05:18:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:14,686 INFO L482 AbstractCegarLoop]: Abstraction has 3810 states and 15943 transitions. [2021-06-05 05:18:14,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15943 transitions. [2021-06-05 05:18:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:14,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:14,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 05:18:14,893 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1226911191, now seen corresponding path program 214 times [2021-06-05 05:18:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102378435] [2021-06-05 05:18:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:15,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102378435] [2021-06-05 05:18:15,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102378435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807299353] [2021-06-05 05:18:15,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:15,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:15,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:15,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:15,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:15,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:15,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:15,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807299353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:15,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:15,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078648432] [2021-06-05 05:18:15,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:15,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:15,239 INFO L87 Difference]: Start difference. First operand 3810 states and 15943 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:15,935 INFO L93 Difference]: Finished difference Result 4162 states and 17284 transitions. [2021-06-05 05:18:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:15,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:15,944 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 05:18:15,944 INFO L226 Difference]: Without dead ends: 4136 [2021-06-05 05:18:15,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 626.1ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2021-06-05 05:18:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3814. [2021-06-05 05:18:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3813 states have (on average 4.185418305795961) internal successors, (15959), 3813 states have internal predecessors, (15959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 15959 transitions. [2021-06-05 05:18:16,006 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 15959 transitions. Word has length 23 [2021-06-05 05:18:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:16,006 INFO L482 AbstractCegarLoop]: Abstraction has 3814 states and 15959 transitions. [2021-06-05 05:18:16,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 15959 transitions. [2021-06-05 05:18:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:16,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:16,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:16,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:16,212 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:16,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1720128577, now seen corresponding path program 215 times [2021-06-05 05:18:16,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:16,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22852309] [2021-06-05 05:18:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:16,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22852309] [2021-06-05 05:18:16,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22852309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786666545] [2021-06-05 05:18:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:16,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:16,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:16,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:16,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:16,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:16,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786666545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:16,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:16,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:16,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135836605] [2021-06-05 05:18:16,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:16,592 INFO L87 Difference]: Start difference. First operand 3814 states and 15959 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:17,397 INFO L93 Difference]: Finished difference Result 4142 states and 17206 transitions. [2021-06-05 05:18:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:17,405 INFO L225 Difference]: With dead ends: 4142 [2021-06-05 05:18:17,406 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 05:18:17,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 05:18:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3810. [2021-06-05 05:18:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.1856130217904965) internal successors, (15943), 3809 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15943 transitions. [2021-06-05 05:18:17,462 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15943 transitions. Word has length 23 [2021-06-05 05:18:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:17,462 INFO L482 AbstractCegarLoop]: Abstraction has 3810 states and 15943 transitions. [2021-06-05 05:18:17,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15943 transitions. [2021-06-05 05:18:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:17,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:17,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:17,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:17,668 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -785352321, now seen corresponding path program 216 times [2021-06-05 05:18:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:17,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449962168] [2021-06-05 05:18:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:17,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449962168] [2021-06-05 05:18:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449962168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118420359] [2021-06-05 05:18:17,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:17,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:17,906 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:18:17,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:17,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:17,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:17,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 05:18:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118420359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:18,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:18,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:18,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570328972] [2021-06-05 05:18:18,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:18,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:18,033 INFO L87 Difference]: Start difference. First operand 3810 states and 15943 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:18,692 INFO L93 Difference]: Finished difference Result 4150 states and 17239 transitions. [2021-06-05 05:18:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:18:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:18,701 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:18:18,701 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 05:18:18,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 496.9ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:18:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 05:18:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3814. [2021-06-05 05:18:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3813 states have (on average 4.185418305795961) internal successors, (15959), 3813 states have internal predecessors, (15959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 15959 transitions. [2021-06-05 05:18:18,761 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 15959 transitions. Word has length 23 [2021-06-05 05:18:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:18,761 INFO L482 AbstractCegarLoop]: Abstraction has 3814 states and 15959 transitions. [2021-06-05 05:18:18,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 15959 transitions. [2021-06-05 05:18:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:18,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:18,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:18,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable808 [2021-06-05 05:18:18,967 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1798044853, now seen corresponding path program 217 times [2021-06-05 05:18:18,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:18,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080042989] [2021-06-05 05:18:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:19,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:19,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080042989] [2021-06-05 05:18:19,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080042989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:19,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334367414] [2021-06-05 05:18:19,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:19,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:19,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:19,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:19,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:19,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334367414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:19,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:19,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:19,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463987540] [2021-06-05 05:18:19,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:19,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:19,309 INFO L87 Difference]: Start difference. First operand 3814 states and 15959 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:20,089 INFO L93 Difference]: Finished difference Result 4159 states and 17276 transitions. [2021-06-05 05:18:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:20,098 INFO L225 Difference]: With dead ends: 4159 [2021-06-05 05:18:20,098 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 05:18:20,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 05:18:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3808. [2021-06-05 05:18:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 05:18:20,151 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 05:18:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:20,151 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 05:18:20,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 05:18:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:20,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:20,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:20,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:20,357 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash -649178733, now seen corresponding path program 218 times [2021-06-05 05:18:20,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:20,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139016756] [2021-06-05 05:18:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:20,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139016756] [2021-06-05 05:18:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139016756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687787659] [2021-06-05 05:18:20,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:20,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:20,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:20,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:20,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:20,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:20,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:20,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:20,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:20,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687787659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:20,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:20,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:20,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094378545] [2021-06-05 05:18:20,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:20,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:20,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:20,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:20,672 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:21,281 INFO L93 Difference]: Finished difference Result 4333 states and 17949 transitions. [2021-06-05 05:18:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:18:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:21,290 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 05:18:21,291 INFO L226 Difference]: Without dead ends: 4298 [2021-06-05 05:18:21,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:18:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-06-05 05:18:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3823. [2021-06-05 05:18:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.185243328100471) internal successors, (15996), 3822 states have internal predecessors, (15996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 15996 transitions. [2021-06-05 05:18:21,346 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 15996 transitions. Word has length 23 [2021-06-05 05:18:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:21,346 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 15996 transitions. [2021-06-05 05:18:21,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 15996 transitions. [2021-06-05 05:18:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:21,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:21,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable814 [2021-06-05 05:18:21,552 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1096105303, now seen corresponding path program 219 times [2021-06-05 05:18:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391952466] [2021-06-05 05:18:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:21,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:21,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391952466] [2021-06-05 05:18:21,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391952466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:21,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779219909] [2021-06-05 05:18:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:21,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:21,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:21,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:21,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:21,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:21,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:21,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:21,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:18:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:21,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779219909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:21,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:21,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:21,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647059114] [2021-06-05 05:18:21,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:21,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:21,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:21,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:21,880 INFO L87 Difference]: Start difference. First operand 3823 states and 15996 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:22,544 INFO L93 Difference]: Finished difference Result 4185 states and 17367 transitions. [2021-06-05 05:18:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:18:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:22,554 INFO L225 Difference]: With dead ends: 4185 [2021-06-05 05:18:22,554 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 05:18:22,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:18:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 05:18:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3830. [2021-06-05 05:18:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.183860015669888) internal successors, (16020), 3829 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 16020 transitions. [2021-06-05 05:18:22,617 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 16020 transitions. Word has length 23 [2021-06-05 05:18:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:22,617 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 16020 transitions. [2021-06-05 05:18:22,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 16020 transitions. [2021-06-05 05:18:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:22,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:22,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:22,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:22,824 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:22,825 INFO L82 PathProgramCache]: Analyzing trace with hash 54529235, now seen corresponding path program 220 times [2021-06-05 05:18:22,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:22,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874157548] [2021-06-05 05:18:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:22,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874157548] [2021-06-05 05:18:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874157548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176200813] [2021-06-05 05:18:22,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:22,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:22,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:22,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:22,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:23,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:23,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:23,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:23,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:23,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:23,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:18:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:23,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176200813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:23,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:23,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:23,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258907235] [2021-06-05 05:18:23,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:23,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:23,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:23,183 INFO L87 Difference]: Start difference. First operand 3830 states and 16020 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:23,674 INFO L93 Difference]: Finished difference Result 4145 states and 17211 transitions. [2021-06-05 05:18:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:18:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:23,683 INFO L225 Difference]: With dead ends: 4145 [2021-06-05 05:18:23,683 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 05:18:23,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:18:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 05:18:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3823. [2021-06-05 05:18:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.186551543694401) internal successors, (16001), 3822 states have internal predecessors, (16001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 16001 transitions. [2021-06-05 05:18:23,744 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 16001 transitions. Word has length 23 [2021-06-05 05:18:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:23,745 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 16001 transitions. [2021-06-05 05:18:23,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 16001 transitions. [2021-06-05 05:18:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:23,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:23,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:23,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:23,951 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1110874207, now seen corresponding path program 221 times [2021-06-05 05:18:23,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:23,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166690548] [2021-06-05 05:18:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:24,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:24,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166690548] [2021-06-05 05:18:24,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166690548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:24,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844809710] [2021-06-05 05:18:24,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:24,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:18:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:24,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:24,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:24,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:24,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:24,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:24,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844809710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:24,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:24,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877544974] [2021-06-05 05:18:24,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:24,264 INFO L87 Difference]: Start difference. First operand 3823 states and 16001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:24,980 INFO L93 Difference]: Finished difference Result 4349 states and 18016 transitions. [2021-06-05 05:18:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:18:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:24,989 INFO L225 Difference]: With dead ends: 4349 [2021-06-05 05:18:24,989 INFO L226 Difference]: Without dead ends: 4314 [2021-06-05 05:18:24,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-06-05 05:18:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 3831. [2021-06-05 05:18:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.18668407310705) internal successors, (16035), 3830 states have internal predecessors, (16035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16035 transitions. [2021-06-05 05:18:25,049 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16035 transitions. Word has length 23 [2021-06-05 05:18:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:25,049 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16035 transitions. [2021-06-05 05:18:25,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16035 transitions. [2021-06-05 05:18:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:25,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:25,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:25,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 05:18:25,255 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash 306474983, now seen corresponding path program 222 times [2021-06-05 05:18:25,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:25,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684938424] [2021-06-05 05:18:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:25,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684938424] [2021-06-05 05:18:25,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684938424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793283526] [2021-06-05 05:18:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:25,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:25,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:25,509 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:18:25,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:18:25,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:25,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:25,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:25,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 05:18:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:25,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793283526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:25,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:25,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:25,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332037953] [2021-06-05 05:18:25,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:25,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:25,621 INFO L87 Difference]: Start difference. First operand 3831 states and 16035 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:26,604 INFO L93 Difference]: Finished difference Result 4235 states and 17569 transitions. [2021-06-05 05:18:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:18:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:26,613 INFO L225 Difference]: With dead ends: 4235 [2021-06-05 05:18:26,613 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 05:18:26,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 668.0ms TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:18:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 05:18:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 3835. [2021-06-05 05:18:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.1864893062076165) internal successors, (16051), 3834 states have internal predecessors, (16051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16051 transitions. [2021-06-05 05:18:26,668 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16051 transitions. Word has length 23 [2021-06-05 05:18:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:26,668 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16051 transitions. [2021-06-05 05:18:26,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16051 transitions. [2021-06-05 05:18:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:26,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:26,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:26,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-06-05 05:18:26,874 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1920041717, now seen corresponding path program 223 times [2021-06-05 05:18:26,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:26,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722980330] [2021-06-05 05:18:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:26,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:26,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722980330] [2021-06-05 05:18:26,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722980330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:26,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796674890] [2021-06-05 05:18:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:27,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:27,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:27,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:27,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:27,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:27,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:27,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796674890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:27,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:27,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:27,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239949119] [2021-06-05 05:18:27,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:27,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:27,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:27,192 INFO L87 Difference]: Start difference. First operand 3835 states and 16051 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:28,015 INFO L93 Difference]: Finished difference Result 4298 states and 17828 transitions. [2021-06-05 05:18:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:18:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:28,025 INFO L225 Difference]: With dead ends: 4298 [2021-06-05 05:18:28,025 INFO L226 Difference]: Without dead ends: 4277 [2021-06-05 05:18:28,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-06-05 05:18:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 3823. [2021-06-05 05:18:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.186551543694401) internal successors, (16001), 3822 states have internal predecessors, (16001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 16001 transitions. [2021-06-05 05:18:28,082 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 16001 transitions. Word has length 23 [2021-06-05 05:18:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:28,082 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 16001 transitions. [2021-06-05 05:18:28,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 16001 transitions. [2021-06-05 05:18:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:28,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:28,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:28,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:28,288 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2011186791, now seen corresponding path program 224 times [2021-06-05 05:18:28,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:28,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649933328] [2021-06-05 05:18:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:28,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:28,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649933328] [2021-06-05 05:18:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649933328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:28,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729146432] [2021-06-05 05:18:28,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:28,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:28,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:28,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:28,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:28,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:28,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:28,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:28,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729146432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:28,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:28,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614236363] [2021-06-05 05:18:28,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:28,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:28,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:28,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:28,636 INFO L87 Difference]: Start difference. First operand 3823 states and 16001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:29,288 INFO L93 Difference]: Finished difference Result 4154 states and 17253 transitions. [2021-06-05 05:18:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:18:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:29,297 INFO L225 Difference]: With dead ends: 4154 [2021-06-05 05:18:29,297 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 05:18:29,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:18:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 05:18:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3832. [2021-06-05 05:18:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 4.185069172539807) internal successors, (16033), 3831 states have internal predecessors, (16033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 16033 transitions. [2021-06-05 05:18:29,381 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 16033 transitions. Word has length 23 [2021-06-05 05:18:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:29,381 INFO L482 AbstractCegarLoop]: Abstraction has 3832 states and 16033 transitions. [2021-06-05 05:18:29,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 16033 transitions. [2021-06-05 05:18:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:29,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:29,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:29,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:29,588 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash 969610723, now seen corresponding path program 225 times [2021-06-05 05:18:29,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:29,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593900939] [2021-06-05 05:18:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:29,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:29,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593900939] [2021-06-05 05:18:29,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593900939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:29,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161263866] [2021-06-05 05:18:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:29,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:29,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:29,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:29,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:29,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:29,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:29,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:29,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161263866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:29,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:29,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30628465] [2021-06-05 05:18:29,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:29,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:29,925 INFO L87 Difference]: Start difference. First operand 3832 states and 16033 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:30,437 INFO L93 Difference]: Finished difference Result 4114 states and 17097 transitions. [2021-06-05 05:18:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:18:30,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:30,446 INFO L225 Difference]: With dead ends: 4114 [2021-06-05 05:18:30,446 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 05:18:30,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:18:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 05:18:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3825. [2021-06-05 05:18:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 05:18:30,502 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 05:18:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:30,502 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 05:18:30,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 05:18:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:30,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:30,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:30,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:30,708 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash 682489371, now seen corresponding path program 226 times [2021-06-05 05:18:30,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:30,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070161586] [2021-06-05 05:18:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070161586] [2021-06-05 05:18:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070161586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290676458] [2021-06-05 05:18:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:30,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:30,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:30,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:30,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:30,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:30,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:30,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290676458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:31,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:31,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738962294] [2021-06-05 05:18:31,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:31,051 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:31,749 INFO L93 Difference]: Finished difference Result 4141 states and 17204 transitions. [2021-06-05 05:18:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:31,758 INFO L225 Difference]: With dead ends: 4141 [2021-06-05 05:18:31,759 INFO L226 Difference]: Without dead ends: 4115 [2021-06-05 05:18:31,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-06-05 05:18:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3829. [2021-06-05 05:18:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186259143155695) internal successors, (16025), 3828 states have internal predecessors, (16025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16025 transitions. [2021-06-05 05:18:31,820 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16025 transitions. Word has length 23 [2021-06-05 05:18:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:31,820 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16025 transitions. [2021-06-05 05:18:31,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16025 transitions. [2021-06-05 05:18:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:31,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:31,826 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:32,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-06-05 05:18:32,027 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 189271985, now seen corresponding path program 227 times [2021-06-05 05:18:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:32,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646251615] [2021-06-05 05:18:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:32,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646251615] [2021-06-05 05:18:32,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646251615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100958571] [2021-06-05 05:18:32,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:32,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:32,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:32,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:32,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:32,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:32,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:32,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:32,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100958571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:32,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:32,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:32,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944115008] [2021-06-05 05:18:32,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:32,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:32,370 INFO L87 Difference]: Start difference. First operand 3829 states and 16025 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:33,129 INFO L93 Difference]: Finished difference Result 4146 states and 17225 transitions. [2021-06-05 05:18:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:33,138 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 05:18:33,138 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 05:18:33,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 05:18:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3825. [2021-06-05 05:18:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 05:18:33,196 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 05:18:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:33,196 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 05:18:33,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 05:18:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:33,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:33,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:33,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:33,405 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1124048241, now seen corresponding path program 228 times [2021-06-05 05:18:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:33,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946947348] [2021-06-05 05:18:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:33,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:33,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946947348] [2021-06-05 05:18:33,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946947348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:33,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563420153] [2021-06-05 05:18:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:33,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:33,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:33,666 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:18:33,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:18:33,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:33,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:33,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:33,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 05:18:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:33,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563420153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:33,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:33,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:33,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121891741] [2021-06-05 05:18:33,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:33,803 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:34,394 INFO L93 Difference]: Finished difference Result 4148 states and 17235 transitions. [2021-06-05 05:18:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:18:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:34,405 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 05:18:34,405 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 05:18:34,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:18:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 05:18:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3825. [2021-06-05 05:18:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 05:18:34,463 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 05:18:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:34,463 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 05:18:34,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 05:18:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:34,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:34,470 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:34,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-06-05 05:18:34,671 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 111355709, now seen corresponding path program 229 times [2021-06-05 05:18:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:34,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157040425] [2021-06-05 05:18:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:34,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:34,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157040425] [2021-06-05 05:18:34,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157040425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:34,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471741770] [2021-06-05 05:18:34,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:34,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:34,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:34,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:34,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:34,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:34,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:35,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471741770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:35,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:35,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:35,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214677512] [2021-06-05 05:18:35,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:35,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:35,015 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:35,800 INFO L93 Difference]: Finished difference Result 4169 states and 17319 transitions. [2021-06-05 05:18:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:35,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:35,810 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 05:18:35,810 INFO L226 Difference]: Without dead ends: 4148 [2021-06-05 05:18:35,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-06-05 05:18:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3825. [2021-06-05 05:18:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 05:18:35,893 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 05:18:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:35,893 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 05:18:35,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 05:18:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:35,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:35,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:36,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 05:18:36,100 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 203137755, now seen corresponding path program 230 times [2021-06-05 05:18:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43242390] [2021-06-05 05:18:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:36,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:36,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43242390] [2021-06-05 05:18:36,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43242390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:36,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909547034] [2021-06-05 05:18:36,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:36,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:36,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:36,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:36,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:36,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:36,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:36,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:36,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909547034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:36,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:36,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:36,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067993376] [2021-06-05 05:18:36,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:36,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:36,419 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:37,258 INFO L93 Difference]: Finished difference Result 4275 states and 17767 transitions. [2021-06-05 05:18:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:37,267 INFO L225 Difference]: With dead ends: 4275 [2021-06-05 05:18:37,267 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 05:18:37,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:18:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 05:18:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3831. [2021-06-05 05:18:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186945169712794) internal successors, (16036), 3830 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16036 transitions. [2021-06-05 05:18:37,322 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16036 transitions. Word has length 23 [2021-06-05 05:18:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:37,322 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16036 transitions. [2021-06-05 05:18:37,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16036 transitions. [2021-06-05 05:18:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:37,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:37,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:37,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable842,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:37,528 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash 788471707, now seen corresponding path program 231 times [2021-06-05 05:18:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:37,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788732829] [2021-06-05 05:18:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:37,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:37,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788732829] [2021-06-05 05:18:37,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788732829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977132111] [2021-06-05 05:18:37,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:37,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:18:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:37,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:37,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:37,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:37,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:37,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:37,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:37,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977132111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:37,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:37,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:37,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199735160] [2021-06-05 05:18:37,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:37,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:37,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:37,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:37,853 INFO L87 Difference]: Start difference. First operand 3831 states and 16036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:38,547 INFO L93 Difference]: Finished difference Result 4212 states and 17485 transitions. [2021-06-05 05:18:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:18:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:38,555 INFO L225 Difference]: With dead ends: 4212 [2021-06-05 05:18:38,556 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 05:18:38,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:18:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 05:18:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3835. [2021-06-05 05:18:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.186750130412102) internal successors, (16052), 3834 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16052 transitions. [2021-06-05 05:18:38,610 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16052 transitions. Word has length 23 [2021-06-05 05:18:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:38,610 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16052 transitions. [2021-06-05 05:18:38,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16052 transitions. [2021-06-05 05:18:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:38,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:38,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:38,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 05:18:38,816 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:38,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1892928855, now seen corresponding path program 232 times [2021-06-05 05:18:38,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:38,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163101179] [2021-06-05 05:18:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:38,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:38,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163101179] [2021-06-05 05:18:38,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163101179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:38,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933295933] [2021-06-05 05:18:38,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:38,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:38,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:38,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:39,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:39,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:39,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:39,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:39,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:39,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:39,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933295933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:39,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:39,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782403194] [2021-06-05 05:18:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:39,179 INFO L87 Difference]: Start difference. First operand 3835 states and 16052 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:40,201 INFO L93 Difference]: Finished difference Result 4196 states and 17433 transitions. [2021-06-05 05:18:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:18:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:40,210 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 05:18:40,210 INFO L226 Difference]: Without dead ends: 4175 [2021-06-05 05:18:40,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2021-06-05 05:18:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 3827. [2021-06-05 05:18:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186617877679038) internal successors, (16018), 3826 states have internal predecessors, (16018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16018 transitions. [2021-06-05 05:18:40,267 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16018 transitions. Word has length 23 [2021-06-05 05:18:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:40,267 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16018 transitions. [2021-06-05 05:18:40,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16018 transitions. [2021-06-05 05:18:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:40,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:40,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:40,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:40,474 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:40,474 INFO L82 PathProgramCache]: Analyzing trace with hash -24083625, now seen corresponding path program 233 times [2021-06-05 05:18:40,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:40,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299040645] [2021-06-05 05:18:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:40,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:40,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299040645] [2021-06-05 05:18:40,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299040645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:40,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926923805] [2021-06-05 05:18:40,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:40,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:18:40,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:40,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:40,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:40,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:40,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:40,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:40,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:40,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926923805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:40,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:40,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:40,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116350999] [2021-06-05 05:18:40,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:40,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:40,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:40,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:40,793 INFO L87 Difference]: Start difference. First operand 3827 states and 16018 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:41,483 INFO L93 Difference]: Finished difference Result 4286 states and 17806 transitions. [2021-06-05 05:18:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:41,491 INFO L225 Difference]: With dead ends: 4286 [2021-06-05 05:18:41,491 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 05:18:41,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:18:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 05:18:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3831. [2021-06-05 05:18:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186945169712794) internal successors, (16036), 3830 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16036 transitions. [2021-06-05 05:18:41,549 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16036 transitions. Word has length 23 [2021-06-05 05:18:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:41,549 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16036 transitions. [2021-06-05 05:18:41,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16036 transitions. [2021-06-05 05:18:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:41,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:41,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:41,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable848 [2021-06-05 05:18:41,756 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 489443227, now seen corresponding path program 234 times [2021-06-05 05:18:41,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:41,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537702917] [2021-06-05 05:18:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:41,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:41,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537702917] [2021-06-05 05:18:41,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537702917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:41,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392168838] [2021-06-05 05:18:41,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:41,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:41,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:42,034 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:42,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:18:42,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:42,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:42,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:42,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:18:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:42,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392168838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:42,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:42,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:42,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366883299] [2021-06-05 05:18:42,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:42,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:42,164 INFO L87 Difference]: Start difference. First operand 3831 states and 16036 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:42,835 INFO L93 Difference]: Finished difference Result 4224 states and 17548 transitions. [2021-06-05 05:18:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:18:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:42,844 INFO L225 Difference]: With dead ends: 4224 [2021-06-05 05:18:42,844 INFO L226 Difference]: Without dead ends: 4199 [2021-06-05 05:18:42,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:18:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-06-05 05:18:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3835. [2021-06-05 05:18:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.186750130412102) internal successors, (16052), 3834 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16052 transitions. [2021-06-05 05:18:42,898 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16052 transitions. Word has length 23 [2021-06-05 05:18:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:42,898 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16052 transitions. [2021-06-05 05:18:42,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16052 transitions. [2021-06-05 05:18:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:42,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:42,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:43,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 05:18:43,104 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1565154383, now seen corresponding path program 235 times [2021-06-05 05:18:43,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:43,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318662305] [2021-06-05 05:18:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:43,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318662305] [2021-06-05 05:18:43,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318662305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979509142] [2021-06-05 05:18:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:43,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:43,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:43,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:43,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:43,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:43,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979509142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:43,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:43,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541225078] [2021-06-05 05:18:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:43,434 INFO L87 Difference]: Start difference. First operand 3835 states and 16052 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:44,315 INFO L93 Difference]: Finished difference Result 4220 states and 17527 transitions. [2021-06-05 05:18:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:18:44,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:44,324 INFO L225 Difference]: With dead ends: 4220 [2021-06-05 05:18:44,325 INFO L226 Difference]: Without dead ends: 4199 [2021-06-05 05:18:44,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:18:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-06-05 05:18:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3827. [2021-06-05 05:18:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186617877679038) internal successors, (16018), 3826 states have internal predecessors, (16018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16018 transitions. [2021-06-05 05:18:44,385 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16018 transitions. Word has length 23 [2021-06-05 05:18:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:44,385 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16018 transitions. [2021-06-05 05:18:44,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16018 transitions. [2021-06-05 05:18:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:44,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:44,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:44,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-05 05:18:44,591 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:44,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1846150235, now seen corresponding path program 236 times [2021-06-05 05:18:44,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:44,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407628483] [2021-06-05 05:18:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:44,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:44,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407628483] [2021-06-05 05:18:44,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407628483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:44,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387118840] [2021-06-05 05:18:44,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:44,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:44,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:44,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:44,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:44,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:44,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:44,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:44,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:44,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:44,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387118840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:44,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:44,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:44,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956772292] [2021-06-05 05:18:44,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:44,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:44,943 INFO L87 Difference]: Start difference. First operand 3827 states and 16018 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:45,542 INFO L93 Difference]: Finished difference Result 4116 states and 17113 transitions. [2021-06-05 05:18:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:18:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:45,551 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 05:18:45,551 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 05:18:45,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:18:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 05:18:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3836. [2021-06-05 05:18:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 4.185136897001303) internal successors, (16050), 3835 states have internal predecessors, (16050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 16050 transitions. [2021-06-05 05:18:45,604 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 16050 transitions. Word has length 23 [2021-06-05 05:18:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:45,604 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 16050 transitions. [2021-06-05 05:18:45,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 16050 transitions. [2021-06-05 05:18:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:45,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:45,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:45,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:45,810 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash 804574167, now seen corresponding path program 237 times [2021-06-05 05:18:45,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:45,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045617104] [2021-06-05 05:18:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:45,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:45,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045617104] [2021-06-05 05:18:45,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045617104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:45,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979105264] [2021-06-05 05:18:45,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:45,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:46,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:46,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:46,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:46,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:46,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:46,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:46,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979105264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:46,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:46,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:46,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840283273] [2021-06-05 05:18:46,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:46,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:46,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:46,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:46,132 INFO L87 Difference]: Start difference. First operand 3836 states and 16050 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:46,654 INFO L93 Difference]: Finished difference Result 4145 states and 17217 transitions. [2021-06-05 05:18:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:18:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:46,662 INFO L225 Difference]: With dead ends: 4145 [2021-06-05 05:18:46,663 INFO L226 Difference]: Without dead ends: 4117 [2021-06-05 05:18:46,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-06-05 05:18:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3829. [2021-06-05 05:18:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186520376175548) internal successors, (16026), 3828 states have internal predecessors, (16026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16026 transitions. [2021-06-05 05:18:46,715 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16026 transitions. Word has length 23 [2021-06-05 05:18:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:46,715 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16026 transitions. [2021-06-05 05:18:46,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16026 transitions. [2021-06-05 05:18:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:46,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:46,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:46,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-05 05:18:46,921 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 517452815, now seen corresponding path program 238 times [2021-06-05 05:18:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:46,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11038503] [2021-06-05 05:18:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:47,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:47,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11038503] [2021-06-05 05:18:47,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11038503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:47,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053801886] [2021-06-05 05:18:47,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:47,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:47,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:47,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:47,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:47,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:47,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:47,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:47,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:47,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053801886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:47,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:47,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:47,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021050003] [2021-06-05 05:18:47,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:47,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:47,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:47,256 INFO L87 Difference]: Start difference. First operand 3829 states and 16026 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:47,811 INFO L93 Difference]: Finished difference Result 4136 states and 17183 transitions. [2021-06-05 05:18:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:18:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:47,820 INFO L225 Difference]: With dead ends: 4136 [2021-06-05 05:18:47,820 INFO L226 Difference]: Without dead ends: 4110 [2021-06-05 05:18:47,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:18:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-06-05 05:18:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3833. [2021-06-05 05:18:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.1863256784968685) internal successors, (16042), 3832 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16042 transitions. [2021-06-05 05:18:47,881 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16042 transitions. Word has length 23 [2021-06-05 05:18:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:47,881 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16042 transitions. [2021-06-05 05:18:47,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16042 transitions. [2021-06-05 05:18:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:47,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:47,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:48,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:48,088 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash 24235429, now seen corresponding path program 239 times [2021-06-05 05:18:48,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:48,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296491310] [2021-06-05 05:18:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:48,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:48,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296491310] [2021-06-05 05:18:48,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296491310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:48,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184395296] [2021-06-05 05:18:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:48,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:48,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:48,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:48,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:48,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:48,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:48,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184395296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:48,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:48,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:48,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105390250] [2021-06-05 05:18:48,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:48,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:48,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:48,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:48,465 INFO L87 Difference]: Start difference. First operand 3833 states and 16042 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:49,193 INFO L93 Difference]: Finished difference Result 4121 states and 17133 transitions. [2021-06-05 05:18:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:49,202 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 05:18:49,202 INFO L226 Difference]: Without dead ends: 4100 [2021-06-05 05:18:49,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-06-05 05:18:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3829. [2021-06-05 05:18:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186520376175548) internal successors, (16026), 3828 states have internal predecessors, (16026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16026 transitions. [2021-06-05 05:18:49,259 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16026 transitions. Word has length 23 [2021-06-05 05:18:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:49,259 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16026 transitions. [2021-06-05 05:18:49,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16026 transitions. [2021-06-05 05:18:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:49,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:49,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:49,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-05 05:18:49,466 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:49,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:49,466 INFO L82 PathProgramCache]: Analyzing trace with hash 959011685, now seen corresponding path program 240 times [2021-06-05 05:18:49,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:49,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168349392] [2021-06-05 05:18:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:49,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168349392] [2021-06-05 05:18:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168349392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307932695] [2021-06-05 05:18:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:49,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:49,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:49,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:49,715 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:49,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:18:49,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:49,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:49,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:49,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 05:18:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:49,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307932695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:49,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:49,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:49,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953314010] [2021-06-05 05:18:49,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:49,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:49,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:49,863 INFO L87 Difference]: Start difference. First operand 3829 states and 16026 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:50,515 INFO L93 Difference]: Finished difference Result 4134 states and 17192 transitions. [2021-06-05 05:18:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:18:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:50,524 INFO L225 Difference]: With dead ends: 4134 [2021-06-05 05:18:50,524 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 05:18:50,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 05:18:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3833. [2021-06-05 05:18:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.1863256784968685) internal successors, (16042), 3832 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16042 transitions. [2021-06-05 05:18:50,580 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16042 transitions. Word has length 23 [2021-06-05 05:18:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:50,581 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16042 transitions. [2021-06-05 05:18:50,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16042 transitions. [2021-06-05 05:18:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:50,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:50,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:50,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:50,787 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash -53680847, now seen corresponding path program 241 times [2021-06-05 05:18:50,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:50,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601440221] [2021-06-05 05:18:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:50,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:50,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601440221] [2021-06-05 05:18:50,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601440221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:50,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052177629] [2021-06-05 05:18:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:50,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:51,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:51,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:51,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:51,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:51,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:18:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052177629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:51,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:51,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:51,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828012793] [2021-06-05 05:18:51,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:51,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:51,129 INFO L87 Difference]: Start difference. First operand 3833 states and 16042 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:51,910 INFO L93 Difference]: Finished difference Result 4144 states and 17224 transitions. [2021-06-05 05:18:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:51,919 INFO L225 Difference]: With dead ends: 4144 [2021-06-05 05:18:51,919 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 05:18:51,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:18:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 05:18:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3825. [2021-06-05 05:18:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 05:18:51,978 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 05:18:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:51,978 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 05:18:51,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 05:18:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:51,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:51,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:52,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:52,185 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -872706097, now seen corresponding path program 242 times [2021-06-05 05:18:52,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:52,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289529469] [2021-06-05 05:18:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:52,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289529469] [2021-06-05 05:18:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289529469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224542329] [2021-06-05 05:18:52,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:52,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:52,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:52,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:52,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:52,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:52,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:52,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:52,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224542329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:52,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:52,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:52,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80302799] [2021-06-05 05:18:52,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:52,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:52,500 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:53,355 INFO L93 Difference]: Finished difference Result 4650 states and 19251 transitions. [2021-06-05 05:18:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:18:53,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:53,364 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 05:18:53,364 INFO L226 Difference]: Without dead ends: 4628 [2021-06-05 05:18:53,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:18:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2021-06-05 05:18:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 3831. [2021-06-05 05:18:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186422976501306) internal successors, (16034), 3830 states have internal predecessors, (16034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16034 transitions. [2021-06-05 05:18:53,426 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16034 transitions. Word has length 23 [2021-06-05 05:18:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:53,426 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16034 transitions. [2021-06-05 05:18:53,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16034 transitions. [2021-06-05 05:18:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:53,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:53,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:53,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 05:18:53,633 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -359179245, now seen corresponding path program 243 times [2021-06-05 05:18:53,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:53,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024255933] [2021-06-05 05:18:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:53,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024255933] [2021-06-05 05:18:53,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024255933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882774984] [2021-06-05 05:18:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:53,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:18:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:53,885 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:53,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:18:53,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:53,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:53,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:53,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:18:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:54,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882774984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:54,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:54,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:18:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346413691] [2021-06-05 05:18:54,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:54,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:54,007 INFO L87 Difference]: Start difference. First operand 3831 states and 16034 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:54,883 INFO L93 Difference]: Finished difference Result 4429 states and 18354 transitions. [2021-06-05 05:18:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:18:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:54,893 INFO L225 Difference]: With dead ends: 4429 [2021-06-05 05:18:54,893 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 05:18:54,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:18:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 05:18:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3835. [2021-06-05 05:18:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.18622848200313) internal successors, (16050), 3834 states have internal predecessors, (16050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16050 transitions. [2021-06-05 05:18:54,958 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16050 transitions. Word has length 23 [2021-06-05 05:18:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:54,958 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16050 transitions. [2021-06-05 05:18:54,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16050 transitions. [2021-06-05 05:18:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:54,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:54,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:55,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 05:18:55,197 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash 716531911, now seen corresponding path program 244 times [2021-06-05 05:18:55,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:55,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535466293] [2021-06-05 05:18:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:55,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:55,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535466293] [2021-06-05 05:18:55,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535466293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:55,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389279577] [2021-06-05 05:18:55,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:55,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:55,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:55,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:55,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:55,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:55,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:55,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:55,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:55,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389279577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:55,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:55,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:55,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24638109] [2021-06-05 05:18:55,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:55,524 INFO L87 Difference]: Start difference. First operand 3835 states and 16050 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:56,415 INFO L93 Difference]: Finished difference Result 4490 states and 18593 transitions. [2021-06-05 05:18:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:18:56,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:56,424 INFO L225 Difference]: With dead ends: 4490 [2021-06-05 05:18:56,425 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 05:18:56,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:18:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 05:18:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3827. [2021-06-05 05:18:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186095138525876) internal successors, (16016), 3826 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16016 transitions. [2021-06-05 05:18:56,482 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16016 transitions. Word has length 23 [2021-06-05 05:18:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:56,482 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16016 transitions. [2021-06-05 05:18:56,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16016 transitions. [2021-06-05 05:18:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:56,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:56,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:56,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-05 05:18:56,689 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:56,689 INFO L82 PathProgramCache]: Analyzing trace with hash -463198599, now seen corresponding path program 245 times [2021-06-05 05:18:56,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:56,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651701434] [2021-06-05 05:18:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:56,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:56,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651701434] [2021-06-05 05:18:56,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651701434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:56,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977931138] [2021-06-05 05:18:56,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:56,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:56,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:56,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:56,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:56,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:56,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:56,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:56,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:18:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:56,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977931138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:56,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:56,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:56,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026559489] [2021-06-05 05:18:57,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:57,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:57,000 INFO L87 Difference]: Start difference. First operand 3827 states and 16016 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:57,819 INFO L93 Difference]: Finished difference Result 4644 states and 19191 transitions. [2021-06-05 05:18:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:18:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:57,828 INFO L225 Difference]: With dead ends: 4644 [2021-06-05 05:18:57,829 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 05:18:57,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:18:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 05:18:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 3833. [2021-06-05 05:18:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.187630480167015) internal successors, (16047), 3832 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16047 transitions. [2021-06-05 05:18:57,907 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16047 transitions. Word has length 23 [2021-06-05 05:18:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:57,907 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16047 transitions. [2021-06-05 05:18:57,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:57,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16047 transitions. [2021-06-05 05:18:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:57,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:57,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:58,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-05 05:18:58,138 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash 124546723, now seen corresponding path program 246 times [2021-06-05 05:18:58,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:58,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940887085] [2021-06-05 05:18:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:58,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:58,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940887085] [2021-06-05 05:18:58,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940887085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392268711] [2021-06-05 05:18:58,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:58,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:58,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:18:58,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:58,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:58,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 05:18:58,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:58,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:58,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:58,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:36 [2021-06-05 05:18:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:58,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392268711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:58,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:58,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:18:58,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170592817] [2021-06-05 05:18:58,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:18:58,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:18:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:18:58,492 INFO L87 Difference]: Start difference. First operand 3833 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:59,044 INFO L93 Difference]: Finished difference Result 4233 states and 17591 transitions. [2021-06-05 05:18:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:18:59,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:18:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:59,053 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 05:18:59,053 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 05:18:59,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 05:18:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3833. [2021-06-05 05:18:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.187630480167015) internal successors, (16047), 3832 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16047 transitions. [2021-06-05 05:18:59,114 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16047 transitions. Word has length 23 [2021-06-05 05:18:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:59,115 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16047 transitions. [2021-06-05 05:18:59,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16047 transitions. [2021-06-05 05:18:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:18:59,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:59,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:59,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:59,321 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1200257879, now seen corresponding path program 247 times [2021-06-05 05:18:59,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:59,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637010520] [2021-06-05 05:18:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:59,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:59,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637010520] [2021-06-05 05:18:59,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637010520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:59,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524241963] [2021-06-05 05:18:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:18:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:59,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:59,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:59,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:59,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:59,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:59,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:18:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524241963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:59,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:59,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:18:59,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182628611] [2021-06-05 05:18:59,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:18:59,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:18:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:18:59,645 INFO L87 Difference]: Start difference. First operand 3833 states and 16047 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:00,449 INFO L93 Difference]: Finished difference Result 4388 states and 18200 transitions. [2021-06-05 05:19:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:19:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:00,458 INFO L225 Difference]: With dead ends: 4388 [2021-06-05 05:19:00,458 INFO L226 Difference]: Without dead ends: 4367 [2021-06-05 05:19:00,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:19:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-06-05 05:19:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 3829. [2021-06-05 05:19:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.188610240334378) internal successors, (16034), 3828 states have internal predecessors, (16034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16034 transitions. [2021-06-05 05:19:00,513 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16034 transitions. Word has length 23 [2021-06-05 05:19:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:00,513 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16034 transitions. [2021-06-05 05:19:00,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16034 transitions. [2021-06-05 05:19:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:00,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:00,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:00,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:00,719 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 936545277, now seen corresponding path program 248 times [2021-06-05 05:19:00,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:00,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41581612] [2021-06-05 05:19:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:00,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41581612] [2021-06-05 05:19:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41581612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767291774] [2021-06-05 05:19:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:00,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:00,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:00,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:00,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:00,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:00,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:00,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:00,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:00,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:01,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767291774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:01,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:01,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:01,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145257388] [2021-06-05 05:19:01,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:01,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:01,054 INFO L87 Difference]: Start difference. First operand 3829 states and 16034 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:01,616 INFO L93 Difference]: Finished difference Result 4121 states and 17136 transitions. [2021-06-05 05:19:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:19:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:01,625 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 05:19:01,625 INFO L226 Difference]: Without dead ends: 4095 [2021-06-05 05:19:01,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:19:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2021-06-05 05:19:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 3843. [2021-06-05 05:19:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3842 states have (on average 4.187662675689745) internal successors, (16089), 3842 states have internal predecessors, (16089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 16089 transitions. [2021-06-05 05:19:01,681 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 16089 transitions. Word has length 23 [2021-06-05 05:19:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:01,681 INFO L482 AbstractCegarLoop]: Abstraction has 3843 states and 16089 transitions. [2021-06-05 05:19:01,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 16089 transitions. [2021-06-05 05:19:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:01,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:01,687 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:01,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 05:19:01,888 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -105030791, now seen corresponding path program 249 times [2021-06-05 05:19:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:01,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784033435] [2021-06-05 05:19:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:01,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:01,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784033435] [2021-06-05 05:19:01,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784033435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:01,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395622483] [2021-06-05 05:19:01,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:02,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:02,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:02,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:02,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:02,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:02,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:02,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:02,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:02,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395622483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:02,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:02,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:02,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765812511] [2021-06-05 05:19:02,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:02,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:02,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:02,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:02,223 INFO L87 Difference]: Start difference. First operand 3843 states and 16089 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:02,825 INFO L93 Difference]: Finished difference Result 4177 states and 17349 transitions. [2021-06-05 05:19:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:19:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:02,834 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 05:19:02,834 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 05:19:02,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:19:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 05:19:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3836. [2021-06-05 05:19:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 4.188265971316818) internal successors, (16062), 3835 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 16062 transitions. [2021-06-05 05:19:02,888 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 16062 transitions. Word has length 23 [2021-06-05 05:19:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:02,889 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 16062 transitions. [2021-06-05 05:19:02,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 16062 transitions. [2021-06-05 05:19:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:02,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:02,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:03,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 05:19:03,095 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash -990829071, now seen corresponding path program 250 times [2021-06-05 05:19:03,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:03,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406222283] [2021-06-05 05:19:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:03,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:03,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406222283] [2021-06-05 05:19:03,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406222283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:03,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573604776] [2021-06-05 05:19:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:03,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:03,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:03,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:03,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:03,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:03,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:03,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:19:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:03,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573604776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:03,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:03,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:03,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162007289] [2021-06-05 05:19:03,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:03,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:03,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:03,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:03,413 INFO L87 Difference]: Start difference. First operand 3836 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:04,081 INFO L93 Difference]: Finished difference Result 4316 states and 17895 transitions. [2021-06-05 05:19:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:19:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:04,090 INFO L225 Difference]: With dead ends: 4316 [2021-06-05 05:19:04,091 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 05:19:04,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:19:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 05:19:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3833. [2021-06-05 05:19:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.189457202505219) internal successors, (16054), 3832 states have internal predecessors, (16054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16054 transitions. [2021-06-05 05:19:04,152 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16054 transitions. Word has length 23 [2021-06-05 05:19:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:04,152 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16054 transitions. [2021-06-05 05:19:04,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16054 transitions. [2021-06-05 05:19:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:04,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:04,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:04,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-06-05 05:19:04,359 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1175883353, now seen corresponding path program 251 times [2021-06-05 05:19:04,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:04,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022933796] [2021-06-05 05:19:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022933796] [2021-06-05 05:19:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022933796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298657] [2021-06-05 05:19:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:04,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:04,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:04,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:04,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:04,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:04,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:04,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:04,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:04,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:04,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743093571] [2021-06-05 05:19:04,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:04,737 INFO L87 Difference]: Start difference. First operand 3833 states and 16054 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:05,392 INFO L93 Difference]: Finished difference Result 4089 states and 17014 transitions. [2021-06-05 05:19:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:19:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:05,403 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 05:19:05,403 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 05:19:05,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:19:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 05:19:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3842. [2021-06-05 05:19:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3842 states, 3841 states have (on average 4.187971882322312) internal successors, (16086), 3841 states have internal predecessors, (16086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3842 states to 3842 states and 16086 transitions. [2021-06-05 05:19:05,479 INFO L78 Accepts]: Start accepts. Automaton has 3842 states and 16086 transitions. Word has length 23 [2021-06-05 05:19:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:05,479 INFO L482 AbstractCegarLoop]: Abstraction has 3842 states and 16086 transitions. [2021-06-05 05:19:05,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3842 states and 16086 transitions. [2021-06-05 05:19:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:05,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:05,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:05,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 05:19:05,708 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2077507875, now seen corresponding path program 252 times [2021-06-05 05:19:05,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:05,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24546945] [2021-06-05 05:19:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:05,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:05,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24546945] [2021-06-05 05:19:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24546945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499705171] [2021-06-05 05:19:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:05,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:05,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:06,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:06,098 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:06,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:19:06,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:06,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:06,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:06,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:51 [2021-06-05 05:19:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:06,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499705171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:06,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:06,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:06,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835005058] [2021-06-05 05:19:06,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:06,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:06,344 INFO L87 Difference]: Start difference. First operand 3842 states and 16086 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:07,088 INFO L93 Difference]: Finished difference Result 4110 states and 17095 transitions. [2021-06-05 05:19:07,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:19:07,088 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:07,097 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 05:19:07,097 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 05:19:07,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:19:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 05:19:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3835. [2021-06-05 05:19:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 05:19:07,153 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 05:19:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:07,153 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 05:19:07,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 05:19:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:07,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:07,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:07,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable890 [2021-06-05 05:19:07,360 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1790386523, now seen corresponding path program 253 times [2021-06-05 05:19:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:07,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637597024] [2021-06-05 05:19:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:07,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:07,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637597024] [2021-06-05 05:19:07,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637597024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:07,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775289656] [2021-06-05 05:19:07,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:07,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:07,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:07,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:07,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:07,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:07,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:07,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775289656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:07,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:07,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:07,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344923162] [2021-06-05 05:19:07,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:07,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:07,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:07,707 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:08,322 INFO L93 Difference]: Finished difference Result 4111 states and 17092 transitions. [2021-06-05 05:19:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:19:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:08,331 INFO L225 Difference]: With dead ends: 4111 [2021-06-05 05:19:08,331 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 05:19:08,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:19:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 05:19:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3839. [2021-06-05 05:19:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 4.189161021365295) internal successors, (16078), 3838 states have internal predecessors, (16078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 16078 transitions. [2021-06-05 05:19:08,407 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 16078 transitions. Word has length 23 [2021-06-05 05:19:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:08,407 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 16078 transitions. [2021-06-05 05:19:08,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 16078 transitions. [2021-06-05 05:19:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:08,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:08,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:08,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:08,613 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1297169137, now seen corresponding path program 254 times [2021-06-05 05:19:08,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:08,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411791481] [2021-06-05 05:19:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:08,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:08,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411791481] [2021-06-05 05:19:08,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411791481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:08,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128691367] [2021-06-05 05:19:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:08,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:08,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:08,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:08,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:08,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:08,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:08,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128691367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:08,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:08,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:08,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009963598] [2021-06-05 05:19:08,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:08,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:08,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:08,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:08,956 INFO L87 Difference]: Start difference. First operand 3839 states and 16078 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:09,699 INFO L93 Difference]: Finished difference Result 4125 states and 17157 transitions. [2021-06-05 05:19:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:19:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:09,708 INFO L225 Difference]: With dead ends: 4125 [2021-06-05 05:19:09,708 INFO L226 Difference]: Without dead ends: 4104 [2021-06-05 05:19:09,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 667.4ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:19:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2021-06-05 05:19:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 3835. [2021-06-05 05:19:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 05:19:09,767 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 05:19:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:09,768 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 05:19:09,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 05:19:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:09,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:09,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:09,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable896 [2021-06-05 05:19:09,974 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2063021903, now seen corresponding path program 255 times [2021-06-05 05:19:09,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:09,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446321706] [2021-06-05 05:19:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:10,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:10,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446321706] [2021-06-05 05:19:10,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446321706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723047918] [2021-06-05 05:19:10,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:10,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:10,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:10,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:10,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:10,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:10,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:10,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723047918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913016044] [2021-06-05 05:19:10,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:10,323 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:10,989 INFO L93 Difference]: Finished difference Result 4138 states and 17212 transitions. [2021-06-05 05:19:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:19:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:10,998 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 05:19:10,998 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 05:19:10,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:19:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 05:19:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3835. [2021-06-05 05:19:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 05:19:11,053 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 05:19:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:11,053 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 05:19:11,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 05:19:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:11,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:11,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:11,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable898 [2021-06-05 05:19:11,259 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1219252861, now seen corresponding path program 256 times [2021-06-05 05:19:11,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:11,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503269252] [2021-06-05 05:19:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:11,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:11,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503269252] [2021-06-05 05:19:11,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503269252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:11,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375203252] [2021-06-05 05:19:11,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:11,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:11,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:11,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:11,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:11,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:11,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:11,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:11,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375203252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:11,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:11,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:11,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440852733] [2021-06-05 05:19:11,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:11,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:11,636 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:12,412 INFO L93 Difference]: Finished difference Result 4140 states and 17217 transitions. [2021-06-05 05:19:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:19:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:12,421 INFO L225 Difference]: With dead ends: 4140 [2021-06-05 05:19:12,421 INFO L226 Difference]: Without dead ends: 4119 [2021-06-05 05:19:12,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:19:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-06-05 05:19:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3833. [2021-06-05 05:19:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.189457202505219) internal successors, (16054), 3832 states have internal predecessors, (16054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16054 transitions. [2021-06-05 05:19:12,478 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16054 transitions. Word has length 23 [2021-06-05 05:19:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:12,478 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16054 transitions. [2021-06-05 05:19:12,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16054 transitions. [2021-06-05 05:19:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:12,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:12,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:12,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:12,685 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash -498233309, now seen corresponding path program 257 times [2021-06-05 05:19:12,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:12,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578126337] [2021-06-05 05:19:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:12,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:12,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578126337] [2021-06-05 05:19:12,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578126337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:12,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766805394] [2021-06-05 05:19:12,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:12,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:12,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:12,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:19:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:12,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:12,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 05:19:12,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:12,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:12,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:19:12,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-06-05 05:19:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:12,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766805394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:12,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:12,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:19:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190689409] [2021-06-05 05:19:12,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:19:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:12,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:19:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:19:12,982 INFO L87 Difference]: Start difference. First operand 3833 states and 16054 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:13,612 INFO L93 Difference]: Finished difference Result 4292 states and 17808 transitions. [2021-06-05 05:19:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:19:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:13,621 INFO L225 Difference]: With dead ends: 4292 [2021-06-05 05:19:13,621 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 05:19:13,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:19:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 05:19:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3835. [2021-06-05 05:19:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.188836724047992) internal successors, (16060), 3834 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16060 transitions. [2021-06-05 05:19:13,679 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16060 transitions. Word has length 23 [2021-06-05 05:19:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:13,679 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16060 transitions. [2021-06-05 05:19:13,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16060 transitions. [2021-06-05 05:19:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:13,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:13,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:13,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable902 [2021-06-05 05:19:13,886 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:13,887 INFO L82 PathProgramCache]: Analyzing trace with hash 542002489, now seen corresponding path program 258 times [2021-06-05 05:19:13,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:13,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191431232] [2021-06-05 05:19:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:13,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191431232] [2021-06-05 05:19:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191431232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026915401] [2021-06-05 05:19:13,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:14,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:14,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:14,137 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:19:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:19:14,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:14,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:14,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:14,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 05:19:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:14,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026915401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:14,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:14,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:14,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99897415] [2021-06-05 05:19:14,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:14,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:14,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:14,249 INFO L87 Difference]: Start difference. First operand 3835 states and 16060 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:14,956 INFO L93 Difference]: Finished difference Result 4178 states and 17378 transitions. [2021-06-05 05:19:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:19:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:14,964 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 05:19:14,964 INFO L226 Difference]: Without dead ends: 4153 [2021-06-05 05:19:14,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:19:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-05 05:19:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3835. [2021-06-05 05:19:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.188836724047992) internal successors, (16060), 3834 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16060 transitions. [2021-06-05 05:19:15,021 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16060 transitions. Word has length 23 [2021-06-05 05:19:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:15,021 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16060 transitions. [2021-06-05 05:19:15,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16060 transitions. [2021-06-05 05:19:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:15,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:15,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:15,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable905,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:15,228 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash -470690043, now seen corresponding path program 259 times [2021-06-05 05:19:15,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:15,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519263882] [2021-06-05 05:19:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:15,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519263882] [2021-06-05 05:19:15,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519263882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540651027] [2021-06-05 05:19:15,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:15,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:15,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:15,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:15,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:15,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:15,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:15,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:19:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:15,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540651027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:15,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:15,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:15,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682623082] [2021-06-05 05:19:15,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:15,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:15,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:15,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:15,554 INFO L87 Difference]: Start difference. First operand 3835 states and 16060 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:16,386 INFO L93 Difference]: Finished difference Result 4279 states and 17769 transitions. [2021-06-05 05:19:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:19:16,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:16,394 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 05:19:16,395 INFO L226 Difference]: Without dead ends: 4258 [2021-06-05 05:19:16,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:19:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-06-05 05:19:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3831. [2021-06-05 05:19:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.188511749347258) internal successors, (16042), 3830 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16042 transitions. [2021-06-05 05:19:16,450 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16042 transitions. Word has length 23 [2021-06-05 05:19:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:16,450 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16042 transitions. [2021-06-05 05:19:16,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16042 transitions. [2021-06-05 05:19:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:16,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:16,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:16,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-05 05:19:16,656 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1217838641, now seen corresponding path program 260 times [2021-06-05 05:19:16,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:16,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576376835] [2021-06-05 05:19:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:16,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:16,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576376835] [2021-06-05 05:19:16,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576376835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:16,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079750831] [2021-06-05 05:19:16,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:16,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:16,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:16,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:19:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:16,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:19:16,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:16,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 05:19:16,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:16,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:16,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:16,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2021-06-05 05:19:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:16,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079750831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:16,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:16,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:16,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603490709] [2021-06-05 05:19:16,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:16,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:16,981 INFO L87 Difference]: Start difference. First operand 3831 states and 16042 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:17,672 INFO L93 Difference]: Finished difference Result 4353 states and 18026 transitions. [2021-06-05 05:19:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:17,681 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 05:19:17,681 INFO L226 Difference]: Without dead ends: 4344 [2021-06-05 05:19:17,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:19:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2021-06-05 05:19:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 3852. [2021-06-05 05:19:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 4.192936899506622) internal successors, (16147), 3851 states have internal predecessors, (16147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 16147 transitions. [2021-06-05 05:19:17,738 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 16147 transitions. Word has length 23 [2021-06-05 05:19:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:17,738 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 16147 transitions. [2021-06-05 05:19:17,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 16147 transitions. [2021-06-05 05:19:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:17,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:17,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:17,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:17,944 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1331844619, now seen corresponding path program 261 times [2021-06-05 05:19:17,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:17,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787753112] [2021-06-05 05:19:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:18,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787753112] [2021-06-05 05:19:18,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787753112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244254283] [2021-06-05 05:19:18,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:18,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:18,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:19:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:18,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:18,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:18,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:18,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:18,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 05:19:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:18,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244254283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:18,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:18,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:18,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887619651] [2021-06-05 05:19:18,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:18,282 INFO L87 Difference]: Start difference. First operand 3852 states and 16147 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:19,271 INFO L93 Difference]: Finished difference Result 4503 states and 18585 transitions. [2021-06-05 05:19:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:19:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:19,284 INFO L225 Difference]: With dead ends: 4503 [2021-06-05 05:19:19,284 INFO L226 Difference]: Without dead ends: 4484 [2021-06-05 05:19:19,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:19:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2021-06-05 05:19:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 3918. [2021-06-05 05:19:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.198621393923921) internal successors, (16446), 3917 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16446 transitions. [2021-06-05 05:19:19,348 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16446 transitions. Word has length 23 [2021-06-05 05:19:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:19,348 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16446 transitions. [2021-06-05 05:19:19,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16446 transitions. [2021-06-05 05:19:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:19,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:19,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:19,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable912,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:19,557 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1921546609, now seen corresponding path program 262 times [2021-06-05 05:19:19,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:19,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955101398] [2021-06-05 05:19:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:19,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955101398] [2021-06-05 05:19:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955101398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333082697] [2021-06-05 05:19:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:19,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:19,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:19,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:19,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:19,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:19,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:19,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333082697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:19,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:19,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472812713] [2021-06-05 05:19:19,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:19,913 INFO L87 Difference]: Start difference. First operand 3918 states and 16446 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:20,766 INFO L93 Difference]: Finished difference Result 4278 states and 17787 transitions. [2021-06-05 05:19:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:19:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:20,775 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 05:19:20,775 INFO L226 Difference]: Without dead ends: 4269 [2021-06-05 05:19:20,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:19:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-06-05 05:19:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3915. [2021-06-05 05:19:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 4.199029126213592) internal successors, (16435), 3914 states have internal predecessors, (16435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16435 transitions. [2021-06-05 05:19:20,830 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16435 transitions. Word has length 23 [2021-06-05 05:19:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:20,830 INFO L482 AbstractCegarLoop]: Abstraction has 3915 states and 16435 transitions. [2021-06-05 05:19:20,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16435 transitions. [2021-06-05 05:19:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:20,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:20,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:21,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:21,037 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1695665499, now seen corresponding path program 263 times [2021-06-05 05:19:21,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:21,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63825616] [2021-06-05 05:19:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:21,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63825616] [2021-06-05 05:19:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63825616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239009865] [2021-06-05 05:19:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:21,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:19:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:21,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:21,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:21,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:21,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:21,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:21,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:21,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239009865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:21,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:21,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:21,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298521978] [2021-06-05 05:19:21,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:21,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:21,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:21,422 INFO L87 Difference]: Start difference. First operand 3915 states and 16435 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:22,133 INFO L93 Difference]: Finished difference Result 4117 states and 17178 transitions. [2021-06-05 05:19:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:19:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:22,141 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 05:19:22,141 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 05:19:22,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:19:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 05:19:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3922. [2021-06-05 05:19:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.199183881662841) internal successors, (16465), 3921 states have internal predecessors, (16465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16465 transitions. [2021-06-05 05:19:22,194 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16465 transitions. Word has length 23 [2021-06-05 05:19:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:22,194 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16465 transitions. [2021-06-05 05:19:22,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16465 transitions. [2021-06-05 05:19:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:22,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:22,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:22,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:22,400 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash 654089431, now seen corresponding path program 264 times [2021-06-05 05:19:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:22,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399174901] [2021-06-05 05:19:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:22,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:22,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399174901] [2021-06-05 05:19:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399174901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:22,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874086730] [2021-06-05 05:19:22,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:22,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:19:22,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:22,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:22,710 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:19:22,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:19:22,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:19:22,740 INFO L628 ElimStorePlain]: treesize reduction 70, result has 19.5 percent of original size [2021-06-05 05:19:22,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:22,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 05:19:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:22,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874086730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:22,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:22,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:22,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103869985] [2021-06-05 05:19:22,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:22,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:22,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:22,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:22,820 INFO L87 Difference]: Start difference. First operand 3922 states and 16465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:23,571 INFO L93 Difference]: Finished difference Result 4150 states and 17299 transitions. [2021-06-05 05:19:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:19:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:23,579 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:19:23,580 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 05:19:23,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:19:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 05:19:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3922. [2021-06-05 05:19:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.199183881662841) internal successors, (16465), 3921 states have internal predecessors, (16465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16465 transitions. [2021-06-05 05:19:23,634 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16465 transitions. Word has length 23 [2021-06-05 05:19:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:23,634 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16465 transitions. [2021-06-05 05:19:23,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16465 transitions. [2021-06-05 05:19:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:23,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:23,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:23,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable917 [2021-06-05 05:19:23,840 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:23,840 INFO L82 PathProgramCache]: Analyzing trace with hash -231708849, now seen corresponding path program 265 times [2021-06-05 05:19:23,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:23,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635271489] [2021-06-05 05:19:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:23,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:23,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635271489] [2021-06-05 05:19:23,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635271489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:23,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014814718] [2021-06-05 05:19:23,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:24,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:24,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:24,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:24,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:24,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:19:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014814718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:24,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:24,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746355304] [2021-06-05 05:19:24,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:24,179 INFO L87 Difference]: Start difference. First operand 3922 states and 16465 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:24,917 INFO L93 Difference]: Finished difference Result 4298 states and 17873 transitions. [2021-06-05 05:19:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:19:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:24,927 INFO L225 Difference]: With dead ends: 4298 [2021-06-05 05:19:24,927 INFO L226 Difference]: Without dead ends: 4289 [2021-06-05 05:19:24,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:19:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-06-05 05:19:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3917. [2021-06-05 05:19:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.1981613891726255) internal successors, (16440), 3916 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16440 transitions. [2021-06-05 05:19:24,991 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16440 transitions. Word has length 23 [2021-06-05 05:19:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:24,991 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16440 transitions. [2021-06-05 05:19:24,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16440 transitions. [2021-06-05 05:19:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:24,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:24,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:25,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 05:19:25,198 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:25,199 INFO L82 PathProgramCache]: Analyzing trace with hash 157060551, now seen corresponding path program 266 times [2021-06-05 05:19:25,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:25,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085678655] [2021-06-05 05:19:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:25,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085678655] [2021-06-05 05:19:25,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085678655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765641938] [2021-06-05 05:19:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:25,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:25,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:25,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:19:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:25,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:19:25,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:25,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:25,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:25,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:24 [2021-06-05 05:19:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:25,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765641938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:25,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:25,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:25,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646424902] [2021-06-05 05:19:25,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:25,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:25,527 INFO L87 Difference]: Start difference. First operand 3917 states and 16440 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:26,340 INFO L93 Difference]: Finished difference Result 4484 states and 18607 transitions. [2021-06-05 05:19:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:19:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:26,349 INFO L225 Difference]: With dead ends: 4484 [2021-06-05 05:19:26,349 INFO L226 Difference]: Without dead ends: 4475 [2021-06-05 05:19:26,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:19:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-06-05 05:19:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3917. [2021-06-05 05:19:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.1981613891726255) internal successors, (16440), 3916 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16440 transitions. [2021-06-05 05:19:26,406 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16440 transitions. Word has length 23 [2021-06-05 05:19:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:26,406 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16440 transitions. [2021-06-05 05:19:26,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16440 transitions. [2021-06-05 05:19:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:26,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:26,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:26,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable923 [2021-06-05 05:19:26,612 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1902344587, now seen corresponding path program 267 times [2021-06-05 05:19:26,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:26,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686544945] [2021-06-05 05:19:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:26,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686544945] [2021-06-05 05:19:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686544945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:26,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247340802] [2021-06-05 05:19:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:26,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:26,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:26,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:26,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:26,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:26,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:26,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:26,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:26,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247340802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:26,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:26,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:26,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168761770] [2021-06-05 05:19:26,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:26,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:26,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:26,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:26,964 INFO L87 Difference]: Start difference. First operand 3917 states and 16440 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:28,341 INFO L93 Difference]: Finished difference Result 4535 states and 18823 transitions. [2021-06-05 05:19:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:19:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:28,350 INFO L225 Difference]: With dead ends: 4535 [2021-06-05 05:19:28,350 INFO L226 Difference]: Without dead ends: 4526 [2021-06-05 05:19:28,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 966.0ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:19:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2021-06-05 05:19:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 3921. [2021-06-05 05:19:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 4.198724489795918) internal successors, (16459), 3920 states have internal predecessors, (16459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 16459 transitions. [2021-06-05 05:19:28,408 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 16459 transitions. Word has length 23 [2021-06-05 05:19:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:28,408 INFO L482 AbstractCegarLoop]: Abstraction has 3921 states and 16459 transitions. [2021-06-05 05:19:28,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 16459 transitions. [2021-06-05 05:19:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:28,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:28,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:28,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable924,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:28,615 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash 860768519, now seen corresponding path program 268 times [2021-06-05 05:19:28,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:28,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240895133] [2021-06-05 05:19:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:28,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240895133] [2021-06-05 05:19:28,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240895133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113947104] [2021-06-05 05:19:28,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:28,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:28,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:28,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:28,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:28,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:28,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:28,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113947104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:28,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:28,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:28,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776452906] [2021-06-05 05:19:28,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:28,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:28,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:28,979 INFO L87 Difference]: Start difference. First operand 3921 states and 16459 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:30,610 INFO L93 Difference]: Finished difference Result 4683 states and 19421 transitions. [2021-06-05 05:19:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:19:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:30,620 INFO L225 Difference]: With dead ends: 4683 [2021-06-05 05:19:30,620 INFO L226 Difference]: Without dead ends: 4674 [2021-06-05 05:19:30,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=267, Invalid=1989, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:19:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2021-06-05 05:19:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 3913. [2021-06-05 05:19:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 4.199130879345604) internal successors, (16427), 3912 states have internal predecessors, (16427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 16427 transitions. [2021-06-05 05:19:30,680 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 16427 transitions. Word has length 23 [2021-06-05 05:19:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:30,680 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 16427 transitions. [2021-06-05 05:19:30,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 16427 transitions. [2021-06-05 05:19:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:30,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:30,685 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:30,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:30,886 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:30,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1917113491, now seen corresponding path program 269 times [2021-06-05 05:19:30,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:30,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999313637] [2021-06-05 05:19:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:30,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:30,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999313637] [2021-06-05 05:19:30,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999313637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:30,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370581976] [2021-06-05 05:19:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:31,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:31,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:31,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:31,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:31,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:31,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:31,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:19:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:31,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370581976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:31,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:31,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:31,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521410779] [2021-06-05 05:19:31,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:31,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:31,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:31,260 INFO L87 Difference]: Start difference. First operand 3913 states and 16427 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:32,216 INFO L93 Difference]: Finished difference Result 5268 states and 21685 transitions. [2021-06-05 05:19:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:19:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:32,226 INFO L225 Difference]: With dead ends: 5268 [2021-06-05 05:19:32,227 INFO L226 Difference]: Without dead ends: 5229 [2021-06-05 05:19:32,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 667.2ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:19:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-06-05 05:19:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 3916. [2021-06-05 05:19:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 05:19:32,291 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 05:19:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:32,291 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 05:19:32,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 05:19:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:32,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:32,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:32,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:32,497 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1112714267, now seen corresponding path program 270 times [2021-06-05 05:19:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625011458] [2021-06-05 05:19:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:32,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625011458] [2021-06-05 05:19:32,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625011458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540154160] [2021-06-05 05:19:32,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:32,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:19:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:32,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:19:32,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:32,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:32,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:32,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:32,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:32,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:32,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 05:19:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540154160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:32,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:32,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:32,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910333386] [2021-06-05 05:19:32,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:32,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:32,812 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:34,213 INFO L93 Difference]: Finished difference Result 4810 states and 19848 transitions. [2021-06-05 05:19:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:19:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:34,224 INFO L225 Difference]: With dead ends: 4810 [2021-06-05 05:19:34,224 INFO L226 Difference]: Without dead ends: 4792 [2021-06-05 05:19:34,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1099.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:19:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2021-06-05 05:19:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 3918. [2021-06-05 05:19:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196068419708961) internal successors, (16436), 3917 states have internal predecessors, (16436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16436 transitions. [2021-06-05 05:19:34,289 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16436 transitions. Word has length 23 [2021-06-05 05:19:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:34,290 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16436 transitions. [2021-06-05 05:19:34,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16436 transitions. [2021-06-05 05:19:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:34,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:34,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:34,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-06-05 05:19:34,527 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1568686295, now seen corresponding path program 271 times [2021-06-05 05:19:34,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:34,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787992055] [2021-06-05 05:19:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:34,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:34,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787992055] [2021-06-05 05:19:34,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787992055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:34,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703411919] [2021-06-05 05:19:34,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:34,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:34,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:34,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:34,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:34,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:34,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:19:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:34,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703411919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:34,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:34,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:34,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161876252] [2021-06-05 05:19:34,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:34,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:34,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:34,869 INFO L87 Difference]: Start difference. First operand 3918 states and 16436 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:36,060 INFO L93 Difference]: Finished difference Result 4974 states and 20505 transitions. [2021-06-05 05:19:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:19:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:36,071 INFO L225 Difference]: With dead ends: 4974 [2021-06-05 05:19:36,071 INFO L226 Difference]: Without dead ends: 4942 [2021-06-05 05:19:36,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 916.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:19:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-06-05 05:19:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 3916. [2021-06-05 05:19:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 05:19:36,135 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 05:19:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:36,135 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 05:19:36,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 05:19:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:36,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:36,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:36,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:36,342 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:36,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1477541221, now seen corresponding path program 272 times [2021-06-05 05:19:36,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:36,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316360560] [2021-06-05 05:19:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316360560] [2021-06-05 05:19:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316360560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271697009] [2021-06-05 05:19:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:36,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:36,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:19:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:36,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:36,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:19:36,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:36,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:19:36,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:36,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:36,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:36,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 05:19:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:36,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271697009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:36,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:36,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987472888] [2021-06-05 05:19:36,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:36,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:36,688 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:38,219 INFO L93 Difference]: Finished difference Result 4356 states and 18122 transitions. [2021-06-05 05:19:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:19:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:38,228 INFO L225 Difference]: With dead ends: 4356 [2021-06-05 05:19:38,229 INFO L226 Difference]: Without dead ends: 4347 [2021-06-05 05:19:38,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1042.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:19:38,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-06-05 05:19:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 3922. [2021-06-05 05:19:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.197143585819944) internal successors, (16457), 3921 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16457 transitions. [2021-06-05 05:19:38,290 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16457 transitions. Word has length 23 [2021-06-05 05:19:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:38,290 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16457 transitions. [2021-06-05 05:19:38,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16457 transitions. [2021-06-05 05:19:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:38,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:38,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:38,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:38,496 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:38,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1775850007, now seen corresponding path program 273 times [2021-06-05 05:19:38,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:38,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129152270] [2021-06-05 05:19:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:38,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129152270] [2021-06-05 05:19:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129152270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354693628] [2021-06-05 05:19:38,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:38,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:38,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:38,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:38,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 05:19:38,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:38,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:38,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:38,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 05:19:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:38,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354693628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:38,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:38,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:38,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472295250] [2021-06-05 05:19:38,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:38,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:38,886 INFO L87 Difference]: Start difference. First operand 3922 states and 16457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:40,563 INFO L93 Difference]: Finished difference Result 4453 states and 18505 transitions. [2021-06-05 05:19:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:19:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:40,572 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 05:19:40,573 INFO L226 Difference]: Without dead ends: 4444 [2021-06-05 05:19:40,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:19:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-06-05 05:19:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 3918. [2021-06-05 05:19:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 05:19:40,632 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 05:19:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:40,632 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 05:19:40,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 05:19:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:40,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:40,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:40,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:40,839 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1488728655, now seen corresponding path program 274 times [2021-06-05 05:19:40,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:40,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755529184] [2021-06-05 05:19:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:40,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755529184] [2021-06-05 05:19:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755529184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53331567] [2021-06-05 05:19:40,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:40,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:40,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:41,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:41,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:41,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:41,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:41,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53331567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:41,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:41,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:41,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463073204] [2021-06-05 05:19:41,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:41,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:41,232 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:42,685 INFO L93 Difference]: Finished difference Result 4378 states and 18204 transitions. [2021-06-05 05:19:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:19:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:42,694 INFO L225 Difference]: With dead ends: 4378 [2021-06-05 05:19:42,694 INFO L226 Difference]: Without dead ends: 4369 [2021-06-05 05:19:42,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1157.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:19:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4369 states. [2021-06-05 05:19:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4369 to 3922. [2021-06-05 05:19:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196378474878857) internal successors, (16454), 3921 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16454 transitions. [2021-06-05 05:19:42,753 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16454 transitions. Word has length 23 [2021-06-05 05:19:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:42,753 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16454 transitions. [2021-06-05 05:19:42,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16454 transitions. [2021-06-05 05:19:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:42,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:42,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:42,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-06-05 05:19:42,960 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash 995511269, now seen corresponding path program 275 times [2021-06-05 05:19:42,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:42,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899291937] [2021-06-05 05:19:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:43,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899291937] [2021-06-05 05:19:43,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899291937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:43,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486116230] [2021-06-05 05:19:43,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:43,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:19:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:43,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:43,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:43,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:43,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:43,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:43,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:43,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486116230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:43,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:43,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:43,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719326068] [2021-06-05 05:19:43,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:43,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:43,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:43,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:43,318 INFO L87 Difference]: Start difference. First operand 3922 states and 16454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:44,769 INFO L93 Difference]: Finished difference Result 4367 states and 18169 transitions. [2021-06-05 05:19:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:19:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:44,778 INFO L225 Difference]: With dead ends: 4367 [2021-06-05 05:19:44,778 INFO L226 Difference]: Without dead ends: 4356 [2021-06-05 05:19:44,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:19:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-05 05:19:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3922. [2021-06-05 05:19:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196378474878857) internal successors, (16454), 3921 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16454 transitions. [2021-06-05 05:19:44,833 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16454 transitions. Word has length 23 [2021-06-05 05:19:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:44,833 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16454 transitions. [2021-06-05 05:19:44,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16454 transitions. [2021-06-05 05:19:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:44,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:44,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:45,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:45,039 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:45,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1930287525, now seen corresponding path program 276 times [2021-06-05 05:19:45,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:45,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666284009] [2021-06-05 05:19:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:45,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666284009] [2021-06-05 05:19:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666284009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070148919] [2021-06-05 05:19:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:45,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:45,295 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:19:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:19:45,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:45,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:45,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:45,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 05:19:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:45,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070148919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:45,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:45,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:45,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204291456] [2021-06-05 05:19:45,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:45,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:45,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:45,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:45,453 INFO L87 Difference]: Start difference. First operand 3922 states and 16454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:46,520 INFO L93 Difference]: Finished difference Result 4454 states and 18497 transitions. [2021-06-05 05:19:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:19:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:46,529 INFO L225 Difference]: With dead ends: 4454 [2021-06-05 05:19:46,529 INFO L226 Difference]: Without dead ends: 4420 [2021-06-05 05:19:46,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 818.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:19:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-06-05 05:19:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3928. [2021-06-05 05:19:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196078431372549) internal successors, (16478), 3927 states have internal predecessors, (16478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16478 transitions. [2021-06-05 05:19:46,588 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16478 transitions. Word has length 23 [2021-06-05 05:19:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:46,589 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16478 transitions. [2021-06-05 05:19:46,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16478 transitions. [2021-06-05 05:19:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:46,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:46,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:46,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 05:19:46,795 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash 917594993, now seen corresponding path program 277 times [2021-06-05 05:19:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:46,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885078503] [2021-06-05 05:19:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:46,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:46,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885078503] [2021-06-05 05:19:46,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885078503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:46,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369511156] [2021-06-05 05:19:46,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:47,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:47,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 05:19:47,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:47,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:47,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:47,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 05:19:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:47,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369511156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:47,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:47,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:47,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037188038] [2021-06-05 05:19:47,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:47,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:47,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:47,176 INFO L87 Difference]: Start difference. First operand 3928 states and 16478 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:48,724 INFO L93 Difference]: Finished difference Result 4446 states and 18479 transitions. [2021-06-05 05:19:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:19:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:48,734 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 05:19:48,734 INFO L226 Difference]: Without dead ends: 4435 [2021-06-05 05:19:48,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1815, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:19:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-06-05 05:19:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3924. [2021-06-05 05:19:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 05:19:48,795 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 05:19:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:48,795 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 05:19:48,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 05:19:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:48,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:48,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:49,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:49,001 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1579445, now seen corresponding path program 278 times [2021-06-05 05:19:49,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:49,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921782175] [2021-06-05 05:19:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:49,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:49,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921782175] [2021-06-05 05:19:49,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921782175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:49,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247011927] [2021-06-05 05:19:49,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:49,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:19:49,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:49,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:49,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:19:49,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:49,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:49,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:49,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 05:19:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:49,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247011927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:49,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:49,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882138930] [2021-06-05 05:19:49,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:49,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:49,325 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:49,959 INFO L93 Difference]: Finished difference Result 4229 states and 17621 transitions. [2021-06-05 05:19:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:19:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:49,967 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 05:19:49,967 INFO L226 Difference]: Without dead ends: 4220 [2021-06-05 05:19:49,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:19:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-06-05 05:19:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3928. [2021-06-05 05:19:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196842373312961) internal successors, (16481), 3927 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16481 transitions. [2021-06-05 05:19:50,021 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16481 transitions. Word has length 23 [2021-06-05 05:19:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:50,021 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16481 transitions. [2021-06-05 05:19:50,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16481 transitions. [2021-06-05 05:19:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:50,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:50,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:50,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable946,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:50,227 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1043155513, now seen corresponding path program 279 times [2021-06-05 05:19:50,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:50,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051379784] [2021-06-05 05:19:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:50,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051379784] [2021-06-05 05:19:50,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051379784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590986519] [2021-06-05 05:19:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:50,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:50,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:50,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:50,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:50,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:50,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:50,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:19:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590986519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:50,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:50,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307335967] [2021-06-05 05:19:50,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:50,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:50,579 INFO L87 Difference]: Start difference. First operand 3928 states and 16481 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:51,306 INFO L93 Difference]: Finished difference Result 4229 states and 17625 transitions. [2021-06-05 05:19:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:19:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:51,314 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 05:19:51,315 INFO L226 Difference]: Without dead ends: 4220 [2021-06-05 05:19:51,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:19:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-06-05 05:19:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3924. [2021-06-05 05:19:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 05:19:51,370 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 05:19:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:51,370 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 05:19:51,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 05:19:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:51,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:51,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:51,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:51,576 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1928953793, now seen corresponding path program 280 times [2021-06-05 05:19:51,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:51,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236777238] [2021-06-05 05:19:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:51,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236777238] [2021-06-05 05:19:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236777238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986383981] [2021-06-05 05:19:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:51,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:51,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:51,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:51,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:19:51,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:51,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:51,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:51,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:19:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:51,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986383981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:51,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:51,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:51,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374812354] [2021-06-05 05:19:51,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:51,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:51,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:51,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:51,912 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:52,712 INFO L93 Difference]: Finished difference Result 4391 states and 18255 transitions. [2021-06-05 05:19:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:19:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:52,721 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 05:19:52,722 INFO L226 Difference]: Without dead ends: 4382 [2021-06-05 05:19:52,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:19:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-06-05 05:19:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3924. [2021-06-05 05:19:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 05:19:52,784 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 05:19:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:52,784 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 05:19:52,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 05:19:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:52,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:52,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:52,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:52,991 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2114008075, now seen corresponding path program 281 times [2021-06-05 05:19:52,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:52,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058625316] [2021-06-05 05:19:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:53,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058625316] [2021-06-05 05:19:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058625316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255438990] [2021-06-05 05:19:53,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:53,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:53,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:53,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:53,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:53,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:53,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:53,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:53,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:53,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:53,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:53,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255438990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:53,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:53,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223203504] [2021-06-05 05:19:53,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:53,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:53,358 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:54,146 INFO L93 Difference]: Finished difference Result 4220 states and 17589 transitions. [2021-06-05 05:19:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:19:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:54,155 INFO L225 Difference]: With dead ends: 4220 [2021-06-05 05:19:54,155 INFO L226 Difference]: Without dead ends: 4211 [2021-06-05 05:19:54,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 729.6ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:19:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2021-06-05 05:19:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 3928. [2021-06-05 05:19:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196842373312961) internal successors, (16481), 3927 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16481 transitions. [2021-06-05 05:19:54,237 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16481 transitions. Word has length 23 [2021-06-05 05:19:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:54,237 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16481 transitions. [2021-06-05 05:19:54,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16481 transitions. [2021-06-05 05:19:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:54,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:54,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:54,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:54,444 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:54,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1139383153, now seen corresponding path program 282 times [2021-06-05 05:19:54,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:54,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077928650] [2021-06-05 05:19:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:54,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:54,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077928650] [2021-06-05 05:19:54,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077928650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:54,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123582442] [2021-06-05 05:19:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:54,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:54,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:54,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:54,706 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:54,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:19:54,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:54,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:54,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:54,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 05:19:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:54,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123582442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:54,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:54,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:19:54,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686589342] [2021-06-05 05:19:54,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:54,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:54,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:54,844 INFO L87 Difference]: Start difference. First operand 3928 states and 16481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:55,427 INFO L93 Difference]: Finished difference Result 4108 states and 17143 transitions. [2021-06-05 05:19:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:19:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:55,436 INFO L225 Difference]: With dead ends: 4108 [2021-06-05 05:19:55,436 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 05:19:55,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:19:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 05:19:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3924. [2021-06-05 05:19:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 05:19:55,493 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 05:19:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:55,493 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 05:19:55,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 05:19:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:55,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:55,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:55,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:55,700 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash 852261801, now seen corresponding path program 283 times [2021-06-05 05:19:55,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:55,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357715688] [2021-06-05 05:19:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:55,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:55,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357715688] [2021-06-05 05:19:55,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357715688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:55,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875083662] [2021-06-05 05:19:55,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:55,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:55,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:55,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:55,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:55,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:55,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875083662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:56,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:56,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:56,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606130188] [2021-06-05 05:19:56,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:56,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:56,053 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:56,854 INFO L93 Difference]: Finished difference Result 4206 states and 17536 transitions. [2021-06-05 05:19:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:19:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:56,864 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 05:19:56,864 INFO L226 Difference]: Without dead ends: 4197 [2021-06-05 05:19:56,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 703.5ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:19:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2021-06-05 05:19:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 3917. [2021-06-05 05:19:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.202247191011236) internal successors, (16456), 3916 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16456 transitions. [2021-06-05 05:19:56,926 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16456 transitions. Word has length 23 [2021-06-05 05:19:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:56,926 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16456 transitions. [2021-06-05 05:19:56,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16456 transitions. [2021-06-05 05:19:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:56,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:56,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:57,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-05 05:19:57,133 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 359044415, now seen corresponding path program 284 times [2021-06-05 05:19:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:57,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061287347] [2021-06-05 05:19:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:57,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:57,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061287347] [2021-06-05 05:19:57,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061287347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:57,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612107111] [2021-06-05 05:19:57,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:57,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:57,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:19:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:57,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:19:57,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:57,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:19:57,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:57,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:57,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:57,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 05:19:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:57,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612107111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:57,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:57,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192516755] [2021-06-05 05:19:57,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:57,509 INFO L87 Difference]: Start difference. First operand 3917 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:58,266 INFO L93 Difference]: Finished difference Result 4140 states and 17293 transitions. [2021-06-05 05:19:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:19:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:58,275 INFO L225 Difference]: With dead ends: 4140 [2021-06-05 05:19:58,275 INFO L226 Difference]: Without dead ends: 4129 [2021-06-05 05:19:58,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:19:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2021-06-05 05:19:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 3921. [2021-06-05 05:19:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 4.202551020408163) internal successors, (16474), 3920 states have internal predecessors, (16474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 16474 transitions. [2021-06-05 05:19:58,336 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 16474 transitions. Word has length 23 [2021-06-05 05:19:58,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:58,336 INFO L482 AbstractCegarLoop]: Abstraction has 3921 states and 16474 transitions. [2021-06-05 05:19:58,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 16474 transitions. [2021-06-05 05:19:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:58,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:58,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:58,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:58,543 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1293820671, now seen corresponding path program 285 times [2021-06-05 05:19:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:58,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542574699] [2021-06-05 05:19:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:58,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542574699] [2021-06-05 05:19:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542574699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017483016] [2021-06-05 05:19:58,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:58,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:58,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:19:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:58,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:19:58,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 05:19:58,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:58,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:58,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:58,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:16 [2021-06-05 05:19:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:58,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017483016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:58,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:58,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:58,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192565509] [2021-06-05 05:19:58,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:58,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:58,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:58,858 INFO L87 Difference]: Start difference. First operand 3921 states and 16474 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:59,149 INFO L93 Difference]: Finished difference Result 4246 states and 17704 transitions. [2021-06-05 05:19:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:19:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:19:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:59,158 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 05:19:59,158 INFO L226 Difference]: Without dead ends: 4232 [2021-06-05 05:19:59,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2021-06-05 05:19:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3945. [2021-06-05 05:19:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.205121703853956) internal successors, (16585), 3944 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16585 transitions. [2021-06-05 05:19:59,216 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16585 transitions. Word has length 23 [2021-06-05 05:19:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:59,217 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16585 transitions. [2021-06-05 05:19:59,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16585 transitions. [2021-06-05 05:19:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:19:59,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:59,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:59,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable960,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:59,423 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash 281128139, now seen corresponding path program 286 times [2021-06-05 05:19:59,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:59,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427559110] [2021-06-05 05:19:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:59,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427559110] [2021-06-05 05:19:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427559110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824387634] [2021-06-05 05:19:59,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:59,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:59,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:19:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:59,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:59,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:59,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:59,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:59,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:59,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:19:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:59,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824387634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:59,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:59,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:19:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272846907] [2021-06-05 05:19:59,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:19:59,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:19:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:19:59,823 INFO L87 Difference]: Start difference. First operand 3945 states and 16585 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:00,969 INFO L93 Difference]: Finished difference Result 4182 states and 17468 transitions. [2021-06-05 05:20:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:00,978 INFO L225 Difference]: With dead ends: 4182 [2021-06-05 05:20:00,978 INFO L226 Difference]: Without dead ends: 4171 [2021-06-05 05:20:00,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1080.1ms TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:20:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2021-06-05 05:20:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 3926. [2021-06-05 05:20:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.202292993630573) internal successors, (16494), 3925 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16494 transitions. [2021-06-05 05:20:01,034 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16494 transitions. Word has length 23 [2021-06-05 05:20:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:01,034 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16494 transitions. [2021-06-05 05:20:01,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16494 transitions. [2021-06-05 05:20:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:01,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:01,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:01,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 05:20:01,241 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1436358031, now seen corresponding path program 287 times [2021-06-05 05:20:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:01,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836308869] [2021-06-05 05:20:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:01,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:01,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836308869] [2021-06-05 05:20:01,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836308869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:01,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178486627] [2021-06-05 05:20:01,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:01,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:01,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:01,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:01,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:01,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:01,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:01,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:01,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:01,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178486627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:01,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:01,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:01,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983529839] [2021-06-05 05:20:01,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:01,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:01,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:01,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:01,571 INFO L87 Difference]: Start difference. First operand 3926 states and 16494 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:02,396 INFO L93 Difference]: Finished difference Result 4513 states and 18763 transitions. [2021-06-05 05:20:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:02,406 INFO L225 Difference]: With dead ends: 4513 [2021-06-05 05:20:02,406 INFO L226 Difference]: Without dead ends: 4504 [2021-06-05 05:20:02,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:20:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-06-05 05:20:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3928. [2021-06-05 05:20:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.201680672268908) internal successors, (16500), 3927 states have internal predecessors, (16500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16500 transitions. [2021-06-05 05:20:02,473 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16500 transitions. Word has length 23 [2021-06-05 05:20:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:02,473 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16500 transitions. [2021-06-05 05:20:02,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16500 transitions. [2021-06-05 05:20:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:02,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:02,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:02,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:02,680 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash -396122233, now seen corresponding path program 288 times [2021-06-05 05:20:02,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:02,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134563090] [2021-06-05 05:20:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:02,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:02,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134563090] [2021-06-05 05:20:02,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134563090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:02,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905108723] [2021-06-05 05:20:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:02,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:02,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:02,955 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:20:02,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:20:02,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:02,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:02,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:02,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 05:20:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:03,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905108723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:03,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:03,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:20:03,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129889833] [2021-06-05 05:20:03,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:03,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:03,072 INFO L87 Difference]: Start difference. First operand 3928 states and 16500 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:03,680 INFO L93 Difference]: Finished difference Result 4164 states and 17397 transitions. [2021-06-05 05:20:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:20:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:03,688 INFO L225 Difference]: With dead ends: 4164 [2021-06-05 05:20:03,689 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 05:20:03,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 05:20:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3932. [2021-06-05 05:20:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 4.201475451539048) internal successors, (16516), 3931 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 16516 transitions. [2021-06-05 05:20:03,773 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 16516 transitions. Word has length 23 [2021-06-05 05:20:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:03,773 INFO L482 AbstractCegarLoop]: Abstraction has 3932 states and 16516 transitions. [2021-06-05 05:20:03,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 16516 transitions. [2021-06-05 05:20:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:03,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:03,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 05:20:03,980 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1408814765, now seen corresponding path program 289 times [2021-06-05 05:20:03,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:03,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772562706] [2021-06-05 05:20:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:04,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:04,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772562706] [2021-06-05 05:20:04,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772562706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:04,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700191627] [2021-06-05 05:20:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:04,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:04,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:04,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:04,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:04,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:04,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:04,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700191627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:04,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:04,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:04,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927383939] [2021-06-05 05:20:04,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:04,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:04,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:04,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:04,330 INFO L87 Difference]: Start difference. First operand 3932 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:05,306 INFO L93 Difference]: Finished difference Result 4346 states and 18114 transitions. [2021-06-05 05:20:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:20:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:05,316 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 05:20:05,316 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 05:20:05,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:20:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 05:20:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3924. [2021-06-05 05:20:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.201376497578384) internal successors, (16482), 3923 states have internal predecessors, (16482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16482 transitions. [2021-06-05 05:20:05,381 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16482 transitions. Word has length 23 [2021-06-05 05:20:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:05,381 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16482 transitions. [2021-06-05 05:20:05,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16482 transitions. [2021-06-05 05:20:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:05,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:05,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:05,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:05,589 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash -927467449, now seen corresponding path program 290 times [2021-06-05 05:20:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:05,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405739567] [2021-06-05 05:20:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:05,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405739567] [2021-06-05 05:20:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405739567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599902744] [2021-06-05 05:20:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:05,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:05,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:05,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:05,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:05,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:05,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:05,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599902744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:05,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:05,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16880066] [2021-06-05 05:20:05,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:05,909 INFO L87 Difference]: Start difference. First operand 3924 states and 16482 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:06,977 INFO L93 Difference]: Finished difference Result 4799 states and 19930 transitions. [2021-06-05 05:20:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:20:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:06,987 INFO L225 Difference]: With dead ends: 4799 [2021-06-05 05:20:06,987 INFO L226 Difference]: Without dead ends: 4777 [2021-06-05 05:20:06,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:20:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-05 05:20:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 3936. [2021-06-05 05:20:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 4.20279542566709) internal successors, (16538), 3935 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 16538 transitions. [2021-06-05 05:20:07,073 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 16538 transitions. Word has length 23 [2021-06-05 05:20:07,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:07,073 INFO L482 AbstractCegarLoop]: Abstraction has 3936 states and 16538 transitions. [2021-06-05 05:20:07,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 16538 transitions. [2021-06-05 05:20:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:07,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:07,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:07,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-06-05 05:20:07,280 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash -342133497, now seen corresponding path program 291 times [2021-06-05 05:20:07,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:07,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115862136] [2021-06-05 05:20:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:07,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:07,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115862136] [2021-06-05 05:20:07,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115862136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:07,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299655255] [2021-06-05 05:20:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:07,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:07,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:07,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:07,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:07,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:07,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299655255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:07,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:07,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850439821] [2021-06-05 05:20:07,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:07,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:07,611 INFO L87 Difference]: Start difference. First operand 3936 states and 16538 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:08,252 INFO L93 Difference]: Finished difference Result 4590 states and 19078 transitions. [2021-06-05 05:20:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:20:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:08,262 INFO L225 Difference]: With dead ends: 4590 [2021-06-05 05:20:08,262 INFO L226 Difference]: Without dead ends: 4564 [2021-06-05 05:20:08,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-06-05 05:20:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3940. [2021-06-05 05:20:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.202589489718203) internal successors, (16554), 3939 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16554 transitions. [2021-06-05 05:20:08,324 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16554 transitions. Word has length 23 [2021-06-05 05:20:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:08,324 INFO L482 AbstractCegarLoop]: Abstraction has 3940 states and 16554 transitions. [2021-06-05 05:20:08,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16554 transitions. [2021-06-05 05:20:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:08,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:08,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:08,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:08,530 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1271433237, now seen corresponding path program 292 times [2021-06-05 05:20:08,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:08,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838369676] [2021-06-05 05:20:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:08,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838369676] [2021-06-05 05:20:08,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838369676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057240237] [2021-06-05 05:20:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:08,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:08,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:08,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:08,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:08,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057240237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:08,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:08,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227603322] [2021-06-05 05:20:08,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:08,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:08,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:08,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:08,861 INFO L87 Difference]: Start difference. First operand 3940 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:09,771 INFO L93 Difference]: Finished difference Result 4617 states and 19188 transitions. [2021-06-05 05:20:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:20:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:09,782 INFO L225 Difference]: With dead ends: 4617 [2021-06-05 05:20:09,782 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 05:20:09,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 800.9ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:20:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 05:20:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3932. [2021-06-05 05:20:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 4.202493004324599) internal successors, (16520), 3931 states have internal predecessors, (16520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 16520 transitions. [2021-06-05 05:20:09,847 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 16520 transitions. Word has length 23 [2021-06-05 05:20:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:09,847 INFO L482 AbstractCegarLoop]: Abstraction has 3932 states and 16520 transitions. [2021-06-05 05:20:09,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 16520 transitions. [2021-06-05 05:20:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:09,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:09,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:10,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 05:20:10,054 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash -577970071, now seen corresponding path program 293 times [2021-06-05 05:20:10,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:10,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282667465] [2021-06-05 05:20:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:10,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282667465] [2021-06-05 05:20:10,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282667465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007387489] [2021-06-05 05:20:10,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:10,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:10,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:10,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:10,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:10,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:10,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:10,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:10,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:10,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007387489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:10,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:10,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646129083] [2021-06-05 05:20:10,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:10,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:10,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:10,401 INFO L87 Difference]: Start difference. First operand 3932 states and 16520 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:11,095 INFO L93 Difference]: Finished difference Result 4741 states and 19672 transitions. [2021-06-05 05:20:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:11,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:11,105 INFO L225 Difference]: With dead ends: 4741 [2021-06-05 05:20:11,105 INFO L226 Difference]: Without dead ends: 4706 [2021-06-05 05:20:11,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:20:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2021-06-05 05:20:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 3940. [2021-06-05 05:20:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.202589489718203) internal successors, (16554), 3939 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16554 transitions. [2021-06-05 05:20:11,167 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16554 transitions. Word has length 23 [2021-06-05 05:20:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:11,167 INFO L482 AbstractCegarLoop]: Abstraction has 3940 states and 16554 transitions. [2021-06-05 05:20:11,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16554 transitions. [2021-06-05 05:20:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:11,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:11,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:11,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:11,388 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash -496571015, now seen corresponding path program 294 times [2021-06-05 05:20:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:11,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092904771] [2021-06-05 05:20:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:11,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:11,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092904771] [2021-06-05 05:20:11,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092904771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:11,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376902898] [2021-06-05 05:20:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:11,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:11,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:20:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:11,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:11,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:11,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:11,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:11,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:11,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 05:20:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:11,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376902898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:11,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:11,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746369064] [2021-06-05 05:20:11,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:11,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:11,685 INFO L87 Difference]: Start difference. First operand 3940 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:12,332 INFO L93 Difference]: Finished difference Result 4430 states and 18449 transitions. [2021-06-05 05:20:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:20:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:12,343 INFO L225 Difference]: With dead ends: 4430 [2021-06-05 05:20:12,343 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 05:20:12,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 05:20:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3944. [2021-06-05 05:20:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.202383971595232) internal successors, (16570), 3943 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16570 transitions. [2021-06-05 05:20:12,406 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16570 transitions. Word has length 23 [2021-06-05 05:20:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:12,406 INFO L482 AbstractCegarLoop]: Abstraction has 3944 states and 16570 transitions. [2021-06-05 05:20:12,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16570 transitions. [2021-06-05 05:20:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:12,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:12,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:12,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:12,613 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1116995719, now seen corresponding path program 295 times [2021-06-05 05:20:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:12,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458409024] [2021-06-05 05:20:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:12,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:12,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458409024] [2021-06-05 05:20:12,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458409024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:12,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344094553] [2021-06-05 05:20:12,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:12,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:12,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:12,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:12,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:12,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:12,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:12,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:12,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344094553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:12,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:12,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:12,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910275438] [2021-06-05 05:20:12,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:12,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:12,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:12,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:12,935 INFO L87 Difference]: Start difference. First operand 3944 states and 16570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:13,920 INFO L93 Difference]: Finished difference Result 4566 states and 18992 transitions. [2021-06-05 05:20:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:20:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:13,931 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 05:20:13,931 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 05:20:13,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:20:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 05:20:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3938. [2021-06-05 05:20:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 4.203200406400812) internal successors, (16548), 3937 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16548 transitions. [2021-06-05 05:20:13,998 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16548 transitions. Word has length 23 [2021-06-05 05:20:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:13,998 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 16548 transitions. [2021-06-05 05:20:13,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16548 transitions. [2021-06-05 05:20:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:14,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:14,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:14,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:14,205 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1253245707, now seen corresponding path program 296 times [2021-06-05 05:20:14,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:14,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100601098] [2021-06-05 05:20:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:14,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:14,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100601098] [2021-06-05 05:20:14,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100601098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:14,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329055141] [2021-06-05 05:20:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:14,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:14,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:14,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:14,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:14,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:14,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:14,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:14,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329055141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:14,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:14,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:14,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204640891] [2021-06-05 05:20:14,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:14,525 INFO L87 Difference]: Start difference. First operand 3938 states and 16548 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:15,275 INFO L93 Difference]: Finished difference Result 4424 states and 18447 transitions. [2021-06-05 05:20:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:15,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:15,284 INFO L225 Difference]: With dead ends: 4424 [2021-06-05 05:20:15,284 INFO L226 Difference]: Without dead ends: 4402 [2021-06-05 05:20:15,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 617.1ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:20:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-06-05 05:20:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3946. [2021-06-05 05:20:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203548795944233) internal successors, (16583), 3945 states have internal predecessors, (16583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16583 transitions. [2021-06-05 05:20:15,349 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16583 transitions. Word has length 23 [2021-06-05 05:20:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:15,349 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16583 transitions. [2021-06-05 05:20:15,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16583 transitions. [2021-06-05 05:20:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:15,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:15,355 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:15,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 05:20:15,556 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1838579659, now seen corresponding path program 297 times [2021-06-05 05:20:15,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:15,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203009018] [2021-06-05 05:20:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:15,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203009018] [2021-06-05 05:20:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203009018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376929467] [2021-06-05 05:20:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:15,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:15,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:15,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:15,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:15,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:15,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:15,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376929467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:15,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:15,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764626497] [2021-06-05 05:20:15,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:15,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:15,894 INFO L87 Difference]: Start difference. First operand 3946 states and 16583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:16,658 INFO L93 Difference]: Finished difference Result 4312 states and 17981 transitions. [2021-06-05 05:20:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:20:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:16,667 INFO L225 Difference]: With dead ends: 4312 [2021-06-05 05:20:16,667 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 05:20:16,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 05:20:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3950. [2021-06-05 05:20:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203342618384401) internal successors, (16599), 3949 states have internal predecessors, (16599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16599 transitions. [2021-06-05 05:20:16,719 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16599 transitions. Word has length 23 [2021-06-05 05:20:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:16,719 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16599 transitions. [2021-06-05 05:20:16,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16599 transitions. [2021-06-05 05:20:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:16,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:16,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:16,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-06-05 05:20:16,925 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash -842820903, now seen corresponding path program 298 times [2021-06-05 05:20:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:16,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274512880] [2021-06-05 05:20:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:17,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:17,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274512880] [2021-06-05 05:20:17,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274512880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:17,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186033552] [2021-06-05 05:20:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:17,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:17,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:17,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:17,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:17,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:17,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:17,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:17,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:17,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186033552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:17,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:17,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188666413] [2021-06-05 05:20:17,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:17,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:17,257 INFO L87 Difference]: Start difference. First operand 3950 states and 16599 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:18,231 INFO L93 Difference]: Finished difference Result 4333 states and 18069 transitions. [2021-06-05 05:20:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:20:18,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:18,241 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 05:20:18,241 INFO L226 Difference]: Without dead ends: 4312 [2021-06-05 05:20:18,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:20:18,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-05 05:20:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3942. [2021-06-05 05:20:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.203247906622685) internal successors, (16565), 3941 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16565 transitions. [2021-06-05 05:20:18,302 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16565 transitions. Word has length 23 [2021-06-05 05:20:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:18,302 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16565 transitions. [2021-06-05 05:20:18,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16565 transitions. [2021-06-05 05:20:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:18,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:18,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:18,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:18,508 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1026024327, now seen corresponding path program 299 times [2021-06-05 05:20:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:18,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775371801] [2021-06-05 05:20:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:18,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775371801] [2021-06-05 05:20:18,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775371801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189874298] [2021-06-05 05:20:18,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:18,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:18,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:18,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:18,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:18,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:18,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:18,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:18,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189874298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:18,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:18,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:18,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061984508] [2021-06-05 05:20:18,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:18,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:18,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:18,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:18,830 INFO L87 Difference]: Start difference. First operand 3942 states and 16565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:19,683 INFO L93 Difference]: Finished difference Result 4444 states and 18530 transitions. [2021-06-05 05:20:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:19,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:19,692 INFO L225 Difference]: With dead ends: 4444 [2021-06-05 05:20:19,693 INFO L226 Difference]: Without dead ends: 4422 [2021-06-05 05:20:19,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:20:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2021-06-05 05:20:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 3948. [2021-06-05 05:20:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 3947 states have (on average 4.203699011907778) internal successors, (16592), 3947 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 16592 transitions. [2021-06-05 05:20:19,782 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 16592 transitions. Word has length 23 [2021-06-05 05:20:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:19,782 INFO L482 AbstractCegarLoop]: Abstraction has 3948 states and 16592 transitions. [2021-06-05 05:20:19,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 16592 transitions. [2021-06-05 05:20:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:19,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:19,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:19,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable988 [2021-06-05 05:20:19,988 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1539551179, now seen corresponding path program 300 times [2021-06-05 05:20:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:19,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303120598] [2021-06-05 05:20:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:20,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303120598] [2021-06-05 05:20:20,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303120598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569401187] [2021-06-05 05:20:20,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:20,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:20:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:20,249 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 05:20:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 68 [2021-06-05 05:20:20,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:20,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:20,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:20,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:48 [2021-06-05 05:20:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:20,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569401187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:20,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:20,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:20:20,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786549548] [2021-06-05 05:20:20,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:20,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:20,341 INFO L87 Difference]: Start difference. First operand 3948 states and 16592 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:21,248 INFO L93 Difference]: Finished difference Result 4456 states and 18557 transitions. [2021-06-05 05:20:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:20:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:21,257 INFO L225 Difference]: With dead ends: 4456 [2021-06-05 05:20:21,257 INFO L226 Difference]: Without dead ends: 4431 [2021-06-05 05:20:21,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:20:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-06-05 05:20:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 3952. [2021-06-05 05:20:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 4.2034927866362946) internal successors, (16608), 3951 states have internal predecessors, (16608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 16608 transitions. [2021-06-05 05:20:21,318 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 16608 transitions. Word has length 23 [2021-06-05 05:20:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:21,318 INFO L482 AbstractCegarLoop]: Abstraction has 3952 states and 16608 transitions. [2021-06-05 05:20:21,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 16608 transitions. [2021-06-05 05:20:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:21,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:21,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:21,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:21,524 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:21,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1679704961, now seen corresponding path program 301 times [2021-06-05 05:20:21,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:21,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285532570] [2021-06-05 05:20:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:21,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:21,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285532570] [2021-06-05 05:20:21,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285532570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:21,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296331046] [2021-06-05 05:20:21,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:21,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:21,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:21,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:21,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:21,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:21,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:21,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:21,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:21,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296331046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:21,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:21,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61852913] [2021-06-05 05:20:21,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:21,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:21,852 INFO L87 Difference]: Start difference. First operand 3952 states and 16608 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:22,807 INFO L93 Difference]: Finished difference Result 4363 states and 18192 transitions. [2021-06-05 05:20:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:22,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:22,817 INFO L225 Difference]: With dead ends: 4363 [2021-06-05 05:20:22,817 INFO L226 Difference]: Without dead ends: 4342 [2021-06-05 05:20:22,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:20:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-06-05 05:20:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3944. [2021-06-05 05:20:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.2033984275932035) internal successors, (16574), 3943 states have internal predecessors, (16574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16574 transitions. [2021-06-05 05:20:22,883 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16574 transitions. Word has length 23 [2021-06-05 05:20:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:22,884 INFO L482 AbstractCegarLoop]: Abstraction has 3944 states and 16574 transitions. [2021-06-05 05:20:22,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16574 transitions. [2021-06-05 05:20:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:22,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:22,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:23,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 05:20:23,090 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1398709109, now seen corresponding path program 302 times [2021-06-05 05:20:23,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:23,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048873712] [2021-06-05 05:20:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:23,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:23,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048873712] [2021-06-05 05:20:23,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048873712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:23,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764033687] [2021-06-05 05:20:23,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:23,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:23,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:23,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:23,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:23,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:23,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:23,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:23,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764033687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:23,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:23,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:23,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327947106] [2021-06-05 05:20:23,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:23,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:23,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:23,473 INFO L87 Difference]: Start difference. First operand 3944 states and 16574 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:23,903 INFO L93 Difference]: Finished difference Result 4231 states and 17663 transitions. [2021-06-05 05:20:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:20:23,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:23,913 INFO L225 Difference]: With dead ends: 4231 [2021-06-05 05:20:23,913 INFO L226 Difference]: Without dead ends: 4205 [2021-06-05 05:20:23,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2021-06-05 05:20:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3953. [2021-06-05 05:20:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 4.201923076923077) internal successors, (16606), 3952 states have internal predecessors, (16606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 16606 transitions. [2021-06-05 05:20:23,977 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 16606 transitions. Word has length 23 [2021-06-05 05:20:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:23,977 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 16606 transitions. [2021-06-05 05:20:23,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 16606 transitions. [2021-06-05 05:20:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:23,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:23,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:24,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-06-05 05:20:24,184 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1854682119, now seen corresponding path program 303 times [2021-06-05 05:20:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:24,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326199395] [2021-06-05 05:20:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:24,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326199395] [2021-06-05 05:20:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326199395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169222412] [2021-06-05 05:20:24,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:24,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:24,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:24,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:24,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:24,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:24,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:24,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:24,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169222412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:24,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:24,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:24,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606792926] [2021-06-05 05:20:24,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:24,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:24,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:24,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:24,533 INFO L87 Difference]: Start difference. First operand 3953 states and 16606 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:24,965 INFO L93 Difference]: Finished difference Result 4230 states and 17658 transitions. [2021-06-05 05:20:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:20:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:24,975 INFO L225 Difference]: With dead ends: 4230 [2021-06-05 05:20:24,975 INFO L226 Difference]: Without dead ends: 4202 [2021-06-05 05:20:24,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2021-06-05 05:20:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 3946. [2021-06-05 05:20:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203295310519645) internal successors, (16582), 3945 states have internal predecessors, (16582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16582 transitions. [2021-06-05 05:20:25,038 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16582 transitions. Word has length 23 [2021-06-05 05:20:25,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:25,038 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16582 transitions. [2021-06-05 05:20:25,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16582 transitions. [2021-06-05 05:20:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:25,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:25,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:25,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 05:20:25,245 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1567560767, now seen corresponding path program 304 times [2021-06-05 05:20:25,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:25,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608591607] [2021-06-05 05:20:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:25,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608591607] [2021-06-05 05:20:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608591607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826867333] [2021-06-05 05:20:25,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:25,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:25,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:25,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:25,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:25,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:25,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:25,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:25,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826867333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:25,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:25,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:25,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454788218] [2021-06-05 05:20:25,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:25,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:25,600 INFO L87 Difference]: Start difference. First operand 3946 states and 16582 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:26,131 INFO L93 Difference]: Finished difference Result 4279 states and 17852 transitions. [2021-06-05 05:20:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:20:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:26,167 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 05:20:26,167 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 05:20:26,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 05:20:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3950. [2021-06-05 05:20:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203089389718916) internal successors, (16598), 3949 states have internal predecessors, (16598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16598 transitions. [2021-06-05 05:20:26,226 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16598 transitions. Word has length 23 [2021-06-05 05:20:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:26,226 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16598 transitions. [2021-06-05 05:20:26,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16598 transitions. [2021-06-05 05:20:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:26,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:26,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:26,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1000,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:26,432 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1074343381, now seen corresponding path program 305 times [2021-06-05 05:20:26,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:26,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20544594] [2021-06-05 05:20:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:26,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20544594] [2021-06-05 05:20:26,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20544594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133809084] [2021-06-05 05:20:26,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:26,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:26,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:26,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:26,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:26,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:26,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:26,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:26,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:26,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:26,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:26,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133809084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:26,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:26,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:26,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709558617] [2021-06-05 05:20:26,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:26,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:26,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:26,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:26,784 INFO L87 Difference]: Start difference. First operand 3950 states and 16598 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:27,599 INFO L93 Difference]: Finished difference Result 4279 states and 17856 transitions. [2021-06-05 05:20:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:20:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:27,608 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 05:20:27,609 INFO L226 Difference]: Without dead ends: 4258 [2021-06-05 05:20:27,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:20:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-06-05 05:20:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3946. [2021-06-05 05:20:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203295310519645) internal successors, (16582), 3945 states have internal predecessors, (16582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16582 transitions. [2021-06-05 05:20:27,666 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16582 transitions. Word has length 23 [2021-06-05 05:20:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:27,666 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16582 transitions. [2021-06-05 05:20:27,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16582 transitions. [2021-06-05 05:20:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:27,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:27,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:27,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1002,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:27,872 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2009119637, now seen corresponding path program 306 times [2021-06-05 05:20:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:27,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688040709] [2021-06-05 05:20:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:27,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688040709] [2021-06-05 05:20:27,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688040709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525485358] [2021-06-05 05:20:27,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:28,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:28,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:28,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:28,121 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:20:28,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 05:20:28,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:28,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:28,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:28,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:53 [2021-06-05 05:20:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:28,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525485358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:28,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:28,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:20:28,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536701558] [2021-06-05 05:20:28,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:28,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:28,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:28,247 INFO L87 Difference]: Start difference. First operand 3946 states and 16582 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:28,968 INFO L93 Difference]: Finished difference Result 4260 states and 17781 transitions. [2021-06-05 05:20:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:20:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:28,977 INFO L225 Difference]: With dead ends: 4260 [2021-06-05 05:20:28,977 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 05:20:28,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:20:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 05:20:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3950. [2021-06-05 05:20:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203089389718916) internal successors, (16598), 3949 states have internal predecessors, (16598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16598 transitions. [2021-06-05 05:20:29,042 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16598 transitions. Word has length 23 [2021-06-05 05:20:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:29,042 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16598 transitions. [2021-06-05 05:20:29,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16598 transitions. [2021-06-05 05:20:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:29,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:29,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:29,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 05:20:29,248 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 996427105, now seen corresponding path program 307 times [2021-06-05 05:20:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:29,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888793414] [2021-06-05 05:20:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:29,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:29,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888793414] [2021-06-05 05:20:29,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888793414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:29,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996124532] [2021-06-05 05:20:29,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:29,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:29,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:29,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:29,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:29,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:29,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996124532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:29,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:29,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:29,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052718415] [2021-06-05 05:20:29,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:29,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:29,627 INFO L87 Difference]: Start difference. First operand 3950 states and 16598 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:30,354 INFO L93 Difference]: Finished difference Result 4278 states and 17852 transitions. [2021-06-05 05:20:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:20:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:30,363 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 05:20:30,363 INFO L226 Difference]: Without dead ends: 4257 [2021-06-05 05:20:30,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2021-06-05 05:20:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 3942. [2021-06-05 05:20:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.203247906622685) internal successors, (16565), 3941 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16565 transitions. [2021-06-05 05:20:30,419 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16565 transitions. Word has length 23 [2021-06-05 05:20:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:30,419 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16565 transitions. [2021-06-05 05:20:30,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16565 transitions. [2021-06-05 05:20:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:30,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:30,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:30,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-06-05 05:20:30,625 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2145293225, now seen corresponding path program 308 times [2021-06-05 05:20:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:30,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813941423] [2021-06-05 05:20:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:30,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813941423] [2021-06-05 05:20:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813941423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723365841] [2021-06-05 05:20:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:30,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:30,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:30,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:30,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:30,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:30,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:30,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:30,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723365841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:30,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:30,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111414326] [2021-06-05 05:20:30,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:30,952 INFO L87 Difference]: Start difference. First operand 3942 states and 16565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:31,499 INFO L93 Difference]: Finished difference Result 4391 states and 18288 transitions. [2021-06-05 05:20:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:20:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:31,508 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 05:20:31,508 INFO L226 Difference]: Without dead ends: 4356 [2021-06-05 05:20:31,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-05 05:20:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3942. [2021-06-05 05:20:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.202232935803096) internal successors, (16561), 3941 states have internal predecessors, (16561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16561 transitions. [2021-06-05 05:20:31,566 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16561 transitions. Word has length 23 [2021-06-05 05:20:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:31,566 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16561 transitions. [2021-06-05 05:20:31,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16561 transitions. [2021-06-05 05:20:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:31,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:31,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:31,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:31,772 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash -404390035, now seen corresponding path program 309 times [2021-06-05 05:20:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:31,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346763221] [2021-06-05 05:20:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:31,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346763221] [2021-06-05 05:20:31,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346763221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:31,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953163547] [2021-06-05 05:20:31,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:31,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:31,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:20:31,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:20:32,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:32,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 05:20:32,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:32,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:32,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:32,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:29 [2021-06-05 05:20:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:32,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953163547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:32,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:32,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:32,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517753903] [2021-06-05 05:20:32,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:32,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:32,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:32,091 INFO L87 Difference]: Start difference. First operand 3942 states and 16561 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:32,526 INFO L93 Difference]: Finished difference Result 4222 states and 17622 transitions. [2021-06-05 05:20:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:20:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:32,534 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 05:20:32,535 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 05:20:32,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 05:20:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3949. [2021-06-05 05:20:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.200861195542046) internal successors, (16585), 3948 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 16585 transitions. [2021-06-05 05:20:32,592 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 16585 transitions. Word has length 23 [2021-06-05 05:20:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:32,592 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 16585 transitions. [2021-06-05 05:20:32,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 16585 transitions. [2021-06-05 05:20:32,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:32,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:32,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:32,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 05:20:32,798 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1445966103, now seen corresponding path program 310 times [2021-06-05 05:20:32,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:32,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330851818] [2021-06-05 05:20:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:32,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330851818] [2021-06-05 05:20:32,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330851818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767402006] [2021-06-05 05:20:32,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:32,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:32,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:33,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:33,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:33,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:33,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:33,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:33,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:20:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:33,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767402006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:33,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:33,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:33,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547913573] [2021-06-05 05:20:33,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:33,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:33,148 INFO L87 Difference]: Start difference. First operand 3949 states and 16585 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:33,626 INFO L93 Difference]: Finished difference Result 4223 states and 17625 transitions. [2021-06-05 05:20:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:20:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:33,635 INFO L225 Difference]: With dead ends: 4223 [2021-06-05 05:20:33,635 INFO L226 Difference]: Without dead ends: 4191 [2021-06-05 05:20:33,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-06-05 05:20:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3931. [2021-06-05 05:20:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 05:20:33,692 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 05:20:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:33,692 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 05:20:33,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 05:20:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:33,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:33,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:33,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 05:20:33,898 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash -389621131, now seen corresponding path program 311 times [2021-06-05 05:20:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:33,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984477119] [2021-06-05 05:20:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:34,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:34,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984477119] [2021-06-05 05:20:34,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984477119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:34,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153788841] [2021-06-05 05:20:34,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:34,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:20:34,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:34,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:34,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:34,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:34,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:34,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:34,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:34,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:34,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:34,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153788841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:34,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:34,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077887219] [2021-06-05 05:20:34,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:34,223 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:34,829 INFO L93 Difference]: Finished difference Result 4495 states and 18698 transitions. [2021-06-05 05:20:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:20:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:34,838 INFO L225 Difference]: With dead ends: 4495 [2021-06-05 05:20:34,839 INFO L226 Difference]: Without dead ends: 4460 [2021-06-05 05:20:34,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:20:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-06-05 05:20:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3939. [2021-06-05 05:20:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3938 states have (on average 4.203148806500762) internal successors, (16552), 3938 states have internal predecessors, (16552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 16552 transitions. [2021-06-05 05:20:34,897 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 16552 transitions. Word has length 23 [2021-06-05 05:20:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:34,897 INFO L482 AbstractCegarLoop]: Abstraction has 3939 states and 16552 transitions. [2021-06-05 05:20:34,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 16552 transitions. [2021-06-05 05:20:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:34,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:34,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:35,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 05:20:35,104 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1194020355, now seen corresponding path program 312 times [2021-06-05 05:20:35,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:35,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265107985] [2021-06-05 05:20:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:35,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:35,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265107985] [2021-06-05 05:20:35,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265107985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:35,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116119425] [2021-06-05 05:20:35,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:35,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:35,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:35,362 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:20:35,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:20:35,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:35,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:35,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:35,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 05:20:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:35,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116119425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:35,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:35,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:20:35,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751550587] [2021-06-05 05:20:35,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:35,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:35,468 INFO L87 Difference]: Start difference. First operand 3939 states and 16552 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:36,250 INFO L93 Difference]: Finished difference Result 4392 states and 18301 transitions. [2021-06-05 05:20:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:20:36,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:36,259 INFO L225 Difference]: With dead ends: 4392 [2021-06-05 05:20:36,260 INFO L226 Difference]: Without dead ends: 4366 [2021-06-05 05:20:36,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:20:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-05 05:20:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3943. [2021-06-05 05:20:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 4.202942668696093) internal successors, (16568), 3942 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 16568 transitions. [2021-06-05 05:20:36,321 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 16568 transitions. Word has length 23 [2021-06-05 05:20:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:36,321 INFO L482 AbstractCegarLoop]: Abstraction has 3943 states and 16568 transitions. [2021-06-05 05:20:36,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 16568 transitions. [2021-06-05 05:20:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:36,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:36,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:36,528 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 419546379, now seen corresponding path program 313 times [2021-06-05 05:20:36,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:36,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138205563] [2021-06-05 05:20:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:36,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:36,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138205563] [2021-06-05 05:20:36,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138205563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:36,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035840788] [2021-06-05 05:20:36,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:36,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:36,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:36,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:36,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:36,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:36,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:36,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035840788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:36,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:36,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:36,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854223653] [2021-06-05 05:20:36,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:36,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:36,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:36,858 INFO L87 Difference]: Start difference. First operand 3943 states and 16568 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:37,783 INFO L93 Difference]: Finished difference Result 4405 states and 18347 transitions. [2021-06-05 05:20:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:37,793 INFO L225 Difference]: With dead ends: 4405 [2021-06-05 05:20:37,793 INFO L226 Difference]: Without dead ends: 4384 [2021-06-05 05:20:37,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 764.0ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:20:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-06-05 05:20:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3931. [2021-06-05 05:20:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 05:20:37,854 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 05:20:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:37,854 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 05:20:37,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 05:20:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:37,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:37,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:38,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:38,061 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 510691453, now seen corresponding path program 314 times [2021-06-05 05:20:38,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:38,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898571646] [2021-06-05 05:20:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:38,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898571646] [2021-06-05 05:20:38,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898571646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542214299] [2021-06-05 05:20:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:38,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:38,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:38,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:38,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:38,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:38,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:38,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542214299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:38,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:38,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313571526] [2021-06-05 05:20:38,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:38,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:38,417 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:38,944 INFO L93 Difference]: Finished difference Result 4178 states and 17449 transitions. [2021-06-05 05:20:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:20:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:38,953 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 05:20:38,953 INFO L226 Difference]: Without dead ends: 4152 [2021-06-05 05:20:38,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-06-05 05:20:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 3938. [2021-06-05 05:20:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 4.201676403352807) internal successors, (16542), 3937 states have internal predecessors, (16542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16542 transitions. [2021-06-05 05:20:39,014 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16542 transitions. Word has length 23 [2021-06-05 05:20:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 16542 transitions. [2021-06-05 05:20:39,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16542 transitions. [2021-06-05 05:20:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:39,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:39,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:39,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1023,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:39,221 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -530884615, now seen corresponding path program 315 times [2021-06-05 05:20:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:39,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894770643] [2021-06-05 05:20:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:39,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:39,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894770643] [2021-06-05 05:20:39,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894770643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303818414] [2021-06-05 05:20:39,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:39,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:39,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:39,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:39,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:39,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:39,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303818414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:39,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:39,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785610995] [2021-06-05 05:20:39,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:39,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:39,575 INFO L87 Difference]: Start difference. First operand 3938 states and 16542 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:39,957 INFO L93 Difference]: Finished difference Result 4177 states and 17444 transitions. [2021-06-05 05:20:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:20:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:39,966 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 05:20:39,966 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 05:20:39,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 05:20:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3931. [2021-06-05 05:20:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 05:20:40,031 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 05:20:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:40,031 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 05:20:40,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 05:20:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:40,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:40,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:40,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 05:20:40,237 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash -818005967, now seen corresponding path program 316 times [2021-06-05 05:20:40,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:40,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846315858] [2021-06-05 05:20:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:40,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:40,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846315858] [2021-06-05 05:20:40,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846315858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:40,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165171854] [2021-06-05 05:20:40,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:40,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:40,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:40,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:40,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:40,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:40,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:40,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165171854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:40,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:40,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:40,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422735962] [2021-06-05 05:20:40,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:40,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:40,590 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:41,116 INFO L93 Difference]: Finished difference Result 4222 states and 17622 transitions. [2021-06-05 05:20:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:20:41,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:41,125 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 05:20:41,125 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 05:20:41,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 05:20:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3935. [2021-06-05 05:20:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3935 states, 3934 states have (on average 4.202846975088968) internal successors, (16534), 3934 states have internal predecessors, (16534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 16534 transitions. [2021-06-05 05:20:41,180 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 16534 transitions. Word has length 23 [2021-06-05 05:20:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:41,180 INFO L482 AbstractCegarLoop]: Abstraction has 3935 states and 16534 transitions. [2021-06-05 05:20:41,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 16534 transitions. [2021-06-05 05:20:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:41,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:41,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:41,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-06-05 05:20:41,386 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1311223353, now seen corresponding path program 317 times [2021-06-05 05:20:41,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:41,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005549033] [2021-06-05 05:20:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:41,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:41,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005549033] [2021-06-05 05:20:41,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005549033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:41,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286306403] [2021-06-05 05:20:41,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:41,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:41,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:41,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:41,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:41,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:41,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:41,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:41,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:20:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:41,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286306403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:41,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:41,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:41,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267530291] [2021-06-05 05:20:41,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:41,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:41,733 INFO L87 Difference]: Start difference. First operand 3935 states and 16534 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,969 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-06-05 05:20:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:42,536 INFO L93 Difference]: Finished difference Result 4228 states and 17650 transitions. [2021-06-05 05:20:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:20:42,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:42,545 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 05:20:42,545 INFO L226 Difference]: Without dead ends: 4207 [2021-06-05 05:20:42,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:20:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2021-06-05 05:20:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 3931. [2021-06-05 05:20:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 05:20:42,604 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 05:20:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:42,604 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 05:20:42,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 05:20:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:42,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:42,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:42,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:42,811 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:42,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1389139629, now seen corresponding path program 318 times [2021-06-05 05:20:42,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:42,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322859800] [2021-06-05 05:20:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:42,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:42,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322859800] [2021-06-05 05:20:42,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322859800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:42,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881167415] [2021-06-05 05:20:42,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:42,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:42,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:43,060 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:20:43,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:20:43,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:43,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:43,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:43,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 05:20:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:43,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881167415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:43,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:43,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:20:43,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54206948] [2021-06-05 05:20:43,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:43,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:43,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:43,222 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:44,071 INFO L93 Difference]: Finished difference Result 4289 states and 17885 transitions. [2021-06-05 05:20:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:20:44,072 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:44,081 INFO L225 Difference]: With dead ends: 4289 [2021-06-05 05:20:44,081 INFO L226 Difference]: Without dead ends: 4268 [2021-06-05 05:20:44,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:20:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-05 05:20:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3929. [2021-06-05 05:20:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 4.20315682281059) internal successors, (16510), 3928 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 16510 transitions. [2021-06-05 05:20:44,146 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 16510 transitions. Word has length 23 [2021-06-05 05:20:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:44,146 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 16510 transitions. [2021-06-05 05:20:44,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 16510 transitions. [2021-06-05 05:20:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:44,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:44,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:44,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:44,354 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1733706733, now seen corresponding path program 319 times [2021-06-05 05:20:44,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:44,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789927858] [2021-06-05 05:20:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:44,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789927858] [2021-06-05 05:20:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789927858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808464907] [2021-06-05 05:20:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:44,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:44,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:44,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:44,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:44,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:44,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:44,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808464907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:44,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:44,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651810154] [2021-06-05 05:20:44,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:44,664 INFO L87 Difference]: Start difference. First operand 3929 states and 16510 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:45,689 INFO L93 Difference]: Finished difference Result 4709 states and 19578 transitions. [2021-06-05 05:20:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:20:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:45,699 INFO L225 Difference]: With dead ends: 4709 [2021-06-05 05:20:45,699 INFO L226 Difference]: Without dead ends: 4687 [2021-06-05 05:20:45,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:20:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-06-05 05:20:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3941. [2021-06-05 05:20:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 4.201522842639594) internal successors, (16554), 3940 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 16554 transitions. [2021-06-05 05:20:45,759 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 16554 transitions. Word has length 23 [2021-06-05 05:20:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:45,759 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 16554 transitions. [2021-06-05 05:20:45,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 16554 transitions. [2021-06-05 05:20:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:45,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:45,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:45,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 05:20:45,965 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1148372781, now seen corresponding path program 320 times [2021-06-05 05:20:45,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:45,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903854004] [2021-06-05 05:20:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:46,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903854004] [2021-06-05 05:20:46,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903854004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063888639] [2021-06-05 05:20:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:46,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:46,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:46,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:46,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:46,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:46,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:46,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:46,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063888639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:46,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:46,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:46,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416518860] [2021-06-05 05:20:46,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:46,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:46,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:46,294 INFO L87 Difference]: Start difference. First operand 3941 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:47,113 INFO L93 Difference]: Finished difference Result 4573 states and 19006 transitions. [2021-06-05 05:20:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:20:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:47,123 INFO L225 Difference]: With dead ends: 4573 [2021-06-05 05:20:47,123 INFO L226 Difference]: Without dead ends: 4547 [2021-06-05 05:20:47,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-06-05 05:20:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 3945. [2021-06-05 05:20:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.20131845841785) internal successors, (16570), 3944 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16570 transitions. [2021-06-05 05:20:47,184 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16570 transitions. Word has length 23 [2021-06-05 05:20:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:47,184 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16570 transitions. [2021-06-05 05:20:47,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16570 transitions. [2021-06-05 05:20:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:47,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:47,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:47,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1037,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:47,391 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash 465193953, now seen corresponding path program 321 times [2021-06-05 05:20:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:47,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979735124] [2021-06-05 05:20:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:47,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:47,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979735124] [2021-06-05 05:20:47,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979735124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858957738] [2021-06-05 05:20:47,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:47,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:47,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:47,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:47,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:47,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:47,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:47,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:47,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:47,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:47,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858957738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:47,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:47,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191887213] [2021-06-05 05:20:47,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:47,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:47,710 INFO L87 Difference]: Start difference. First operand 3945 states and 16570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:48,548 INFO L93 Difference]: Finished difference Result 4548 states and 18917 transitions. [2021-06-05 05:20:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:20:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:48,557 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 05:20:48,557 INFO L226 Difference]: Without dead ends: 4527 [2021-06-05 05:20:48,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:20:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-06-05 05:20:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 3937. [2021-06-05 05:20:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3936 states have (on average 4.201219512195122) internal successors, (16536), 3936 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 16536 transitions. [2021-06-05 05:20:48,617 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 16536 transitions. Word has length 23 [2021-06-05 05:20:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:48,617 INFO L482 AbstractCegarLoop]: Abstraction has 3937 states and 16536 transitions. [2021-06-05 05:20:48,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 16536 transitions. [2021-06-05 05:20:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:48,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:48,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:48,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1039 [2021-06-05 05:20:48,823 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1384209355, now seen corresponding path program 322 times [2021-06-05 05:20:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:48,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338389127] [2021-06-05 05:20:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:48,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:48,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338389127] [2021-06-05 05:20:48,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338389127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:48,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011983156] [2021-06-05 05:20:48,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:48,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:48,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:48,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:49,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:49,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:49,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:49,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:49,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:49,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011983156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:49,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:49,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694285809] [2021-06-05 05:20:49,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:49,175 INFO L87 Difference]: Start difference. First operand 3937 states and 16536 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:49,767 INFO L93 Difference]: Finished difference Result 4683 states and 19424 transitions. [2021-06-05 05:20:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:20:49,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:49,776 INFO L225 Difference]: With dead ends: 4683 [2021-06-05 05:20:49,776 INFO L226 Difference]: Without dead ends: 4648 [2021-06-05 05:20:49,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-06-05 05:20:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 3930. [2021-06-05 05:20:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3929 states have (on average 4.198014762025961) internal successors, (16494), 3929 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 16494 transitions. [2021-06-05 05:20:49,829 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 16494 transitions. Word has length 23 [2021-06-05 05:20:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:49,829 INFO L482 AbstractCegarLoop]: Abstraction has 3930 states and 16494 transitions. [2021-06-05 05:20:49,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 16494 transitions. [2021-06-05 05:20:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:49,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:49,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:50,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:50,035 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1302810299, now seen corresponding path program 323 times [2021-06-05 05:20:50,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:50,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301208354] [2021-06-05 05:20:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:50,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301208354] [2021-06-05 05:20:50,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301208354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063574118] [2021-06-05 05:20:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:50,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:50,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:50,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:50,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063574118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:50,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:50,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175996865] [2021-06-05 05:20:50,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:50,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:50,360 INFO L87 Difference]: Start difference. First operand 3930 states and 16494 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:51,069 INFO L93 Difference]: Finished difference Result 4465 states and 18574 transitions. [2021-06-05 05:20:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:20:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:51,078 INFO L225 Difference]: With dead ends: 4465 [2021-06-05 05:20:51,079 INFO L226 Difference]: Without dead ends: 4439 [2021-06-05 05:20:51,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2021-06-05 05:20:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3934. [2021-06-05 05:20:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 4.197813374014747) internal successors, (16510), 3933 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 16510 transitions. [2021-06-05 05:20:51,135 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 16510 transitions. Word has length 23 [2021-06-05 05:20:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:51,135 INFO L482 AbstractCegarLoop]: Abstraction has 3934 states and 16510 transitions. [2021-06-05 05:20:51,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 16510 transitions. [2021-06-05 05:20:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:51,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:51,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:51,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:51,341 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash 310756435, now seen corresponding path program 324 times [2021-06-05 05:20:51,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:51,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686659260] [2021-06-05 05:20:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:51,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:51,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686659260] [2021-06-05 05:20:51,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686659260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:51,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688701466] [2021-06-05 05:20:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:51,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:51,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:51,634 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 05:20:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 68 [2021-06-05 05:20:51,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:51,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:51,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:51,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 05:20:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:51,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688701466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:51,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:51,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:20:51,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167671820] [2021-06-05 05:20:51,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:51,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:51,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:51,725 INFO L87 Difference]: Start difference. First operand 3934 states and 16510 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:52,681 INFO L93 Difference]: Finished difference Result 4414 states and 18376 transitions. [2021-06-05 05:20:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:20:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:52,690 INFO L225 Difference]: With dead ends: 4414 [2021-06-05 05:20:52,690 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 05:20:52,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 657.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:20:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 05:20:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3914. [2021-06-05 05:20:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 4.196779964221824) internal successors, (16422), 3913 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 16422 transitions. [2021-06-05 05:20:52,745 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 16422 transitions. Word has length 23 [2021-06-05 05:20:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:52,745 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 16422 transitions. [2021-06-05 05:20:52,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 16422 transitions. [2021-06-05 05:20:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:52,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:52,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:52,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1045 [2021-06-05 05:20:52,951 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1667247717, now seen corresponding path program 325 times [2021-06-05 05:20:52,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:52,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352621422] [2021-06-05 05:20:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:53,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:53,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352621422] [2021-06-05 05:20:53,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352621422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:53,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842145717] [2021-06-05 05:20:53,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:53,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:53,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:53,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:53,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:53,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:53,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:53,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:53,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842145717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:53,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:53,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:53,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908067115] [2021-06-05 05:20:53,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:53,268 INFO L87 Difference]: Start difference. First operand 3914 states and 16422 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:54,128 INFO L93 Difference]: Finished difference Result 4462 states and 18578 transitions. [2021-06-05 05:20:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:20:54,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:54,137 INFO L225 Difference]: With dead ends: 4462 [2021-06-05 05:20:54,137 INFO L226 Difference]: Without dead ends: 4440 [2021-06-05 05:20:54,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:20:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-05 05:20:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3922. [2021-06-05 05:20:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 05:20:54,195 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 05:20:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:54,195 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 05:20:54,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 05:20:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:54,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:54,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:54,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1049 [2021-06-05 05:20:54,401 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1081913765, now seen corresponding path program 326 times [2021-06-05 05:20:54,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:54,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177241434] [2021-06-05 05:20:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:54,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:54,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177241434] [2021-06-05 05:20:54,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177241434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:54,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468767781] [2021-06-05 05:20:54,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:54,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:54,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:54,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:54,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:54,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:54,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:54,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:54,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:54,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468767781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:54,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:54,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:54,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739617723] [2021-06-05 05:20:54,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:54,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:54,733 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:55,493 INFO L93 Difference]: Finished difference Result 4365 states and 18169 transitions. [2021-06-05 05:20:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:20:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:55,502 INFO L225 Difference]: With dead ends: 4365 [2021-06-05 05:20:55,502 INFO L226 Difference]: Without dead ends: 4339 [2021-06-05 05:20:55,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:20:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-05 05:20:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3926. [2021-06-05 05:20:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196687898089172) internal successors, (16472), 3925 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16472 transitions. [2021-06-05 05:20:55,559 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16472 transitions. Word has length 23 [2021-06-05 05:20:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:55,559 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16472 transitions. [2021-06-05 05:20:55,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16472 transitions. [2021-06-05 05:20:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:55,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:55,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:55,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:55,765 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash 531652969, now seen corresponding path program 327 times [2021-06-05 05:20:55,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:55,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259569969] [2021-06-05 05:20:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:55,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:55,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259569969] [2021-06-05 05:20:55,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259569969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:55,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874202107] [2021-06-05 05:20:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:55,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:55,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:55,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:55,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:55,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:56,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:56,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:20:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:56,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874202107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:56,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:56,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:56,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359404762] [2021-06-05 05:20:56,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:56,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:56,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:56,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:56,090 INFO L87 Difference]: Start difference. First operand 3926 states and 16472 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:56,939 INFO L93 Difference]: Finished difference Result 4337 states and 18068 transitions. [2021-06-05 05:20:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:20:56,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:56,949 INFO L225 Difference]: With dead ends: 4337 [2021-06-05 05:20:56,949 INFO L226 Difference]: Without dead ends: 4316 [2021-06-05 05:20:56,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 769.8ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:20:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2021-06-05 05:20:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 3918. [2021-06-05 05:20:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 05:20:57,012 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 05:20:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:57,012 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 05:20:57,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 05:20:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:57,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:57,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:57,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:57,219 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1512810199, now seen corresponding path program 328 times [2021-06-05 05:20:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:57,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548768456] [2021-06-05 05:20:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548768456] [2021-06-05 05:20:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548768456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654884366] [2021-06-05 05:20:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:57,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:57,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:57,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:57,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:57,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:57,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654884366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:57,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:57,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:57,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247428461] [2021-06-05 05:20:57,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:57,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:57,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:57,557 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:58,193 INFO L93 Difference]: Finished difference Result 4358 states and 18168 transitions. [2021-06-05 05:20:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:20:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:58,202 INFO L225 Difference]: With dead ends: 4358 [2021-06-05 05:20:58,202 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 05:20:58,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:20:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 05:20:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3918. [2021-06-05 05:20:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 05:20:58,259 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 05:20:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:58,259 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 05:20:58,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 05:20:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:58,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:58,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:58,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1055,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:58,465 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash -48961385, now seen corresponding path program 329 times [2021-06-05 05:20:58,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:58,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011559180] [2021-06-05 05:20:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:58,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:58,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011559180] [2021-06-05 05:20:58,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011559180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:58,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129038681] [2021-06-05 05:20:58,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:58,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:58,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:58,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:58,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:58,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:58,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:58,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:58,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:58,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:58,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:20:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:58,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129038681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:58,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:58,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:20:58,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508457013] [2021-06-05 05:20:58,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:20:58,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:20:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:20:58,778 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:59,442 INFO L93 Difference]: Finished difference Result 4355 states and 18155 transitions. [2021-06-05 05:20:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:20:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:20:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:59,452 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 05:20:59,452 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 05:20:59,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:20:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 05:20:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3922. [2021-06-05 05:20:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 05:20:59,509 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 05:20:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:59,509 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 05:20:59,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 05:20:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:20:59,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:59,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:59,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 05:20:59,715 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:59,715 INFO L82 PathProgramCache]: Analyzing trace with hash 464565467, now seen corresponding path program 330 times [2021-06-05 05:20:59,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:59,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817653432] [2021-06-05 05:20:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:59,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:59,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817653432] [2021-06-05 05:20:59,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817653432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:59,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089733146] [2021-06-05 05:20:59,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:59,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:59,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:20:59,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:59,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:59,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:59,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:59,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:59,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:59,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:00,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089733146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:00,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:00,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:00,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072983591] [2021-06-05 05:21:00,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:00,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:00,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:00,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:00,046 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:00,554 INFO L93 Difference]: Finished difference Result 4276 states and 17818 transitions. [2021-06-05 05:21:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:21:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:00,563 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 05:21:00,563 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 05:21:00,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:21:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 05:21:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3926. [2021-06-05 05:21:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196687898089172) internal successors, (16472), 3925 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16472 transitions. [2021-06-05 05:21:00,620 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16472 transitions. Word has length 23 [2021-06-05 05:21:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:00,620 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16472 transitions. [2021-06-05 05:21:00,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16472 transitions. [2021-06-05 05:21:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:00,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:00,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:00,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:00,826 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1540276623, now seen corresponding path program 331 times [2021-06-05 05:21:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:00,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475830036] [2021-06-05 05:21:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:00,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475830036] [2021-06-05 05:21:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475830036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636396593] [2021-06-05 05:21:00,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:01,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:01,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:01,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:01,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:01,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636396593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:01,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:01,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673082775] [2021-06-05 05:21:01,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:01,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:01,148 INFO L87 Difference]: Start difference. First operand 3926 states and 16472 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:01,978 INFO L93 Difference]: Finished difference Result 4270 states and 17805 transitions. [2021-06-05 05:21:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:21:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:01,987 INFO L225 Difference]: With dead ends: 4270 [2021-06-05 05:21:01,987 INFO L226 Difference]: Without dead ends: 4249 [2021-06-05 05:21:01,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:21:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-06-05 05:21:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 3918. [2021-06-05 05:21:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 05:21:02,043 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 05:21:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:02,043 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 05:21:02,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 05:21:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:02,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:02,049 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:02,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:02,249 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:02,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1821272475, now seen corresponding path program 332 times [2021-06-05 05:21:02,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:02,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463219907] [2021-06-05 05:21:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:02,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463219907] [2021-06-05 05:21:02,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463219907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330772410] [2021-06-05 05:21:02,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:02,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:02,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:02,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:02,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:02,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:02,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:02,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:02,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:02,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:02,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:02,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330772410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:02,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:02,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036985887] [2021-06-05 05:21:02,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:02,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:02,595 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:03,018 INFO L93 Difference]: Finished difference Result 4104 states and 17136 transitions. [2021-06-05 05:21:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:03,026 INFO L225 Difference]: With dead ends: 4104 [2021-06-05 05:21:03,027 INFO L226 Difference]: Without dead ends: 4078 [2021-06-05 05:21:03,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-06-05 05:21:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3927. [2021-06-05 05:21:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 4.195109526235354) internal successors, (16470), 3926 states have internal predecessors, (16470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 16470 transitions. [2021-06-05 05:21:03,083 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 16470 transitions. Word has length 23 [2021-06-05 05:21:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:03,083 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 16470 transitions. [2021-06-05 05:21:03,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 16470 transitions. [2021-06-05 05:21:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:03,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:03,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:03,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:03,290 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash 779696407, now seen corresponding path program 333 times [2021-06-05 05:21:03,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:03,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307317382] [2021-06-05 05:21:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:03,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:03,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307317382] [2021-06-05 05:21:03,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307317382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:03,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697443032] [2021-06-05 05:21:03,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:03,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:21:03,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:03,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:03,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:03,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:03,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:03,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:03,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:03,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:03,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697443032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:03,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:03,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:03,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214207829] [2021-06-05 05:21:03,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:03,655 INFO L87 Difference]: Start difference. First operand 3927 states and 16470 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:04,064 INFO L93 Difference]: Finished difference Result 4170 states and 17395 transitions. [2021-06-05 05:21:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:21:04,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:04,073 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 05:21:04,073 INFO L226 Difference]: Without dead ends: 4142 [2021-06-05 05:21:04,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-06-05 05:21:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 3920. [2021-06-05 05:21:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196478693544272) internal successors, (16446), 3919 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16446 transitions. [2021-06-05 05:21:04,128 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16446 transitions. Word has length 23 [2021-06-05 05:21:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:04,128 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16446 transitions. [2021-06-05 05:21:04,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16446 transitions. [2021-06-05 05:21:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:04,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:04,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:04,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:04,334 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:04,334 INFO L82 PathProgramCache]: Analyzing trace with hash 492575055, now seen corresponding path program 334 times [2021-06-05 05:21:04,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:04,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723021488] [2021-06-05 05:21:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:04,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723021488] [2021-06-05 05:21:04,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723021488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660819885] [2021-06-05 05:21:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:04,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:04,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:04,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:04,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:04,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:04,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:04,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:04,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:04,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660819885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:04,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:04,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:04,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591015607] [2021-06-05 05:21:04,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:04,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:04,721 INFO L87 Difference]: Start difference. First operand 3920 states and 16446 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:05,221 INFO L93 Difference]: Finished difference Result 4150 states and 17314 transitions. [2021-06-05 05:21:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:21:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:05,230 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:21:05,230 INFO L226 Difference]: Without dead ends: 4124 [2021-06-05 05:21:05,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 577.7ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-05 05:21:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3924. [2021-06-05 05:21:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 05:21:05,287 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 05:21:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:05,288 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 05:21:05,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 05:21:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:05,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:05,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:05,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 05:21:05,494 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash -642331, now seen corresponding path program 335 times [2021-06-05 05:21:05,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:05,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772269448] [2021-06-05 05:21:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:05,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772269448] [2021-06-05 05:21:05,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772269448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846873168] [2021-06-05 05:21:05,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:05,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:05,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:05,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:05,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:05,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:05,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:05,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:05,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846873168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:05,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:05,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:05,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223004564] [2021-06-05 05:21:05,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:05,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:05,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:05,841 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:06,522 INFO L93 Difference]: Finished difference Result 4180 states and 17445 transitions. [2021-06-05 05:21:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:21:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:06,531 INFO L225 Difference]: With dead ends: 4180 [2021-06-05 05:21:06,531 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 05:21:06,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:21:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 05:21:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3920. [2021-06-05 05:21:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196478693544272) internal successors, (16446), 3919 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16446 transitions. [2021-06-05 05:21:06,593 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16446 transitions. Word has length 23 [2021-06-05 05:21:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:06,593 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16446 transitions. [2021-06-05 05:21:06,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16446 transitions. [2021-06-05 05:21:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:06,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:06,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:06,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 05:21:06,800 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 934133925, now seen corresponding path program 336 times [2021-06-05 05:21:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498531536] [2021-06-05 05:21:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:06,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:06,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498531536] [2021-06-05 05:21:06,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498531536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:06,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994935227] [2021-06-05 05:21:06,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:06,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:21:06,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:06,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:07,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:07,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:07,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:07,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:07,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:07,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:07,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994935227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:07,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:07,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:07,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646502158] [2021-06-05 05:21:07,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:07,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:07,139 INFO L87 Difference]: Start difference. First operand 3920 states and 16446 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:07,521 INFO L93 Difference]: Finished difference Result 4191 states and 17481 transitions. [2021-06-05 05:21:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:21:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:07,530 INFO L225 Difference]: With dead ends: 4191 [2021-06-05 05:21:07,530 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 05:21:07,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 05:21:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3924. [2021-06-05 05:21:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 05:21:07,589 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 05:21:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:07,590 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 05:21:07,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 05:21:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:07,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:07,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:07,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:07,796 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash -78558607, now seen corresponding path program 337 times [2021-06-05 05:21:07,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:07,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439029584] [2021-06-05 05:21:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:07,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:07,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439029584] [2021-06-05 05:21:07,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439029584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:07,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847226142] [2021-06-05 05:21:07,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:08,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:08,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:08,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847226142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:08,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:08,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:08,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168224529] [2021-06-05 05:21:08,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:08,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:08,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:08,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:08,140 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:08,747 INFO L93 Difference]: Finished difference Result 4183 states and 17457 transitions. [2021-06-05 05:21:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:21:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:08,756 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 05:21:08,756 INFO L226 Difference]: Without dead ends: 4162 [2021-06-05 05:21:08,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:21:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2021-06-05 05:21:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 3916. [2021-06-05 05:21:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196424010217114) internal successors, (16429), 3915 states have internal predecessors, (16429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16429 transitions. [2021-06-05 05:21:08,812 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16429 transitions. Word has length 23 [2021-06-05 05:21:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:08,812 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16429 transitions. [2021-06-05 05:21:08,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16429 transitions. [2021-06-05 05:21:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:08,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:08,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:09,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:09,019 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:09,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1664788197, now seen corresponding path program 338 times [2021-06-05 05:21:09,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:09,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260515149] [2021-06-05 05:21:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:09,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260515149] [2021-06-05 05:21:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260515149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527494987] [2021-06-05 05:21:09,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:09,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:09,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:09,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:09,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:09,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:09,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:09,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:09,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527494987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:09,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:09,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:09,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052880795] [2021-06-05 05:21:09,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:09,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:09,347 INFO L87 Difference]: Start difference. First operand 3916 states and 16429 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:09,834 INFO L93 Difference]: Finished difference Result 4223 states and 17632 transitions. [2021-06-05 05:21:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:21:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:09,842 INFO L225 Difference]: With dead ends: 4223 [2021-06-05 05:21:09,843 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 05:21:09,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 05:21:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3912. [2021-06-05 05:21:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.196624904116594) internal successors, (16413), 3911 states have internal predecessors, (16413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16413 transitions. [2021-06-05 05:21:09,899 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16413 transitions. Word has length 23 [2021-06-05 05:21:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:09,900 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16413 transitions. [2021-06-05 05:21:09,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16413 transitions. [2021-06-05 05:21:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:09,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:09,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:10,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:10,106 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1958361947, now seen corresponding path program 339 times [2021-06-05 05:21:10,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:10,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696459570] [2021-06-05 05:21:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:10,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:10,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696459570] [2021-06-05 05:21:10,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696459570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:10,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501077683] [2021-06-05 05:21:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:10,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:10,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:10,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:10,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:10,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:10,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:10,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:10,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:10,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:10,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501077683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:10,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:10,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:10,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957075264] [2021-06-05 05:21:10,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:10,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:10,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:10,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:10,419 INFO L87 Difference]: Start difference. First operand 3912 states and 16413 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:11,251 INFO L93 Difference]: Finished difference Result 4355 states and 18155 transitions. [2021-06-05 05:21:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:21:11,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:11,260 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 05:21:11,260 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 05:21:11,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:21:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 05:21:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3920. [2021-06-05 05:21:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 05:21:11,320 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 05:21:11,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:11,320 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 05:21:11,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 05:21:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:11,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:11,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:11,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 05:21:11,527 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:11,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1444835095, now seen corresponding path program 340 times [2021-06-05 05:21:11,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:11,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563246212] [2021-06-05 05:21:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:11,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:11,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563246212] [2021-06-05 05:21:11,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563246212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:11,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151969758] [2021-06-05 05:21:11,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:11,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:11,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:11,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:11,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:11,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:11,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:11,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151969758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:11,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:11,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:11,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431441465] [2021-06-05 05:21:11,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:11,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:11,853 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:12,377 INFO L93 Difference]: Finished difference Result 4356 states and 18132 transitions. [2021-06-05 05:21:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:21:12,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:12,387 INFO L225 Difference]: With dead ends: 4356 [2021-06-05 05:21:12,387 INFO L226 Difference]: Without dead ends: 4331 [2021-06-05 05:21:12,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:21:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-05 05:21:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3924. [2021-06-05 05:21:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 05:21:12,447 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 05:21:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:12,447 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 05:21:12,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 05:21:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:12,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:12,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:12,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 05:21:12,653 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash -369123939, now seen corresponding path program 341 times [2021-06-05 05:21:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:12,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178582740] [2021-06-05 05:21:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:12,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:12,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178582740] [2021-06-05 05:21:12,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178582740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:12,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237358002] [2021-06-05 05:21:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:12,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:12,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:12,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:12,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:12,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:12,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:12,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:12,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:12,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237358002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:12,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:12,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:12,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427972979] [2021-06-05 05:21:12,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:12,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:12,976 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:13,969 INFO L93 Difference]: Finished difference Result 4295 states and 17905 transitions. [2021-06-05 05:21:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:21:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:13,979 INFO L225 Difference]: With dead ends: 4295 [2021-06-05 05:21:13,979 INFO L226 Difference]: Without dead ends: 4274 [2021-06-05 05:21:13,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 863.8ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:21:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-05 05:21:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3916. [2021-06-05 05:21:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196424010217114) internal successors, (16429), 3915 states have internal predecessors, (16429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16429 transitions. [2021-06-05 05:21:14,042 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16429 transitions. Word has length 23 [2021-06-05 05:21:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:14,042 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16429 transitions. [2021-06-05 05:21:14,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16429 transitions. [2021-06-05 05:21:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:14,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:14,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:14,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:14,248 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash -198309007, now seen corresponding path program 342 times [2021-06-05 05:21:14,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:14,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630264490] [2021-06-05 05:21:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:14,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630264490] [2021-06-05 05:21:14,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630264490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051457440] [2021-06-05 05:21:14,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:14,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:14,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:14,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:14,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:14,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:14,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051457440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:14,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:14,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571303302] [2021-06-05 05:21:14,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:14,575 INFO L87 Difference]: Start difference. First operand 3916 states and 16429 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:15,078 INFO L93 Difference]: Finished difference Result 4209 states and 17576 transitions. [2021-06-05 05:21:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:21:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:15,086 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 05:21:15,086 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 05:21:15,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 05:21:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3912. [2021-06-05 05:21:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.196624904116594) internal successors, (16413), 3911 states have internal predecessors, (16413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16413 transitions. [2021-06-05 05:21:15,142 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16413 transitions. Word has length 23 [2021-06-05 05:21:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:15,142 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16413 transitions. [2021-06-05 05:21:15,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16413 transitions. [2021-06-05 05:21:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:15,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:15,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:15,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 05:21:15,349 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1238319051, now seen corresponding path program 343 times [2021-06-05 05:21:15,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:15,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119110013] [2021-06-05 05:21:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:15,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:15,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119110013] [2021-06-05 05:21:15,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119110013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:15,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502796905] [2021-06-05 05:21:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:15,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:15,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:15,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:15,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:15,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:15,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502796905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:15,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:15,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255072764] [2021-06-05 05:21:15,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:15,669 INFO L87 Difference]: Start difference. First operand 3912 states and 16413 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:16,542 INFO L93 Difference]: Finished difference Result 4354 states and 18146 transitions. [2021-06-05 05:21:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:21:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:16,552 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 05:21:16,552 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 05:21:16,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:21:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 05:21:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3918. [2021-06-05 05:21:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.197089609394945) internal successors, (16440), 3917 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16440 transitions. [2021-06-05 05:21:16,612 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16440 transitions. Word has length 23 [2021-06-05 05:21:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:16,612 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16440 transitions. [2021-06-05 05:21:16,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16440 transitions. [2021-06-05 05:21:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:16,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:16,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:16,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:16,819 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1823653003, now seen corresponding path program 344 times [2021-06-05 05:21:16,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:16,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933268704] [2021-06-05 05:21:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:16,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:16,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933268704] [2021-06-05 05:21:16,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933268704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:16,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055898049] [2021-06-05 05:21:16,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:16,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:17,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:17,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:17,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:17,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:17,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:17,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:17,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055898049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:17,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:17,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:17,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501144058] [2021-06-05 05:21:17,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:17,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:17,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:17,168 INFO L87 Difference]: Start difference. First operand 3918 states and 16440 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:17,613 INFO L93 Difference]: Finished difference Result 4269 states and 17784 transitions. [2021-06-05 05:21:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:21:17,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:17,623 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 05:21:17,623 INFO L226 Difference]: Without dead ends: 4243 [2021-06-05 05:21:17,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:21:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-05 05:21:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3922. [2021-06-05 05:21:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 05:21:17,684 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 05:21:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:17,684 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 05:21:17,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 05:21:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:17,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:17,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:17,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:17,890 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash -857747559, now seen corresponding path program 345 times [2021-06-05 05:21:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:17,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055960484] [2021-06-05 05:21:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:18,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055960484] [2021-06-05 05:21:18,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055960484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055181536] [2021-06-05 05:21:18,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:18,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:21:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:18,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:18,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:18,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:18,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:18,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:18,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055181536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:18,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:18,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811727119] [2021-06-05 05:21:18,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:18,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:18,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:18,234 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:19,127 INFO L93 Difference]: Finished difference Result 4276 states and 17820 transitions. [2021-06-05 05:21:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:21:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:19,137 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 05:21:19,137 INFO L226 Difference]: Without dead ends: 4255 [2021-06-05 05:21:19,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:21:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-06-05 05:21:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3914. [2021-06-05 05:21:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 4.196779964221824) internal successors, (16422), 3913 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 16422 transitions. [2021-06-05 05:21:19,197 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 16422 transitions. Word has length 23 [2021-06-05 05:21:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:19,197 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 16422 transitions. [2021-06-05 05:21:19,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 16422 transitions. [2021-06-05 05:21:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:19,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:19,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:19,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 05:21:19,404 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1011097671, now seen corresponding path program 346 times [2021-06-05 05:21:19,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:19,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756543086] [2021-06-05 05:21:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:19,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:19,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756543086] [2021-06-05 05:21:19,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756543086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:19,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250114243] [2021-06-05 05:21:19,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:19,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:19,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:19,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:19,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:19,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:19,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:19,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:19,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:19,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:19,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250114243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:19,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:19,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:19,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699033343] [2021-06-05 05:21:19,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:19,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:19,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:19,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:19,723 INFO L87 Difference]: Start difference. First operand 3914 states and 16422 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:20,598 INFO L93 Difference]: Finished difference Result 4385 states and 18270 transitions. [2021-06-05 05:21:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:21:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:20,607 INFO L225 Difference]: With dead ends: 4385 [2021-06-05 05:21:20,607 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 05:21:20,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:21:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 05:21:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3922. [2021-06-05 05:21:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.197143585819944) internal successors, (16457), 3921 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16457 transitions. [2021-06-05 05:21:20,666 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16457 transitions. Word has length 23 [2021-06-05 05:21:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:20,666 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16457 transitions. [2021-06-05 05:21:20,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16457 transitions. [2021-06-05 05:21:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:20,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:20,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:20,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:20,872 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1524624523, now seen corresponding path program 347 times [2021-06-05 05:21:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:20,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903204279] [2021-06-05 05:21:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:20,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:20,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903204279] [2021-06-05 05:21:20,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903204279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:20,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611755888] [2021-06-05 05:21:20,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:21,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:21,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:21,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:21,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:21,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:21,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:21,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:21,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:21,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611755888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:21,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:21,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:21,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740074171] [2021-06-05 05:21:21,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:21,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:21,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:21,199 INFO L87 Difference]: Start difference. First operand 3922 states and 16457 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:21,848 INFO L93 Difference]: Finished difference Result 4297 states and 17896 transitions. [2021-06-05 05:21:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:21:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:21,857 INFO L225 Difference]: With dead ends: 4297 [2021-06-05 05:21:21,857 INFO L226 Difference]: Without dead ends: 4272 [2021-06-05 05:21:21,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:21:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2021-06-05 05:21:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3926. [2021-06-05 05:21:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196942675159236) internal successors, (16473), 3925 states have internal predecessors, (16473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16473 transitions. [2021-06-05 05:21:21,920 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16473 transitions. Word has length 23 [2021-06-05 05:21:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:21,920 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16473 transitions. [2021-06-05 05:21:21,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16473 transitions. [2021-06-05 05:21:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:21,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:21,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:22,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-05 05:21:22,127 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1694631617, now seen corresponding path program 348 times [2021-06-05 05:21:22,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:22,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073779981] [2021-06-05 05:21:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:22,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:22,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073779981] [2021-06-05 05:21:22,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073779981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:22,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596789172] [2021-06-05 05:21:22,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:22,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:22,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:22,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:22,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:22,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:22,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:22,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596789172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:22,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:22,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021173507] [2021-06-05 05:21:22,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:22,461 INFO L87 Difference]: Start difference. First operand 3926 states and 16473 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:23,415 INFO L93 Difference]: Finished difference Result 4307 states and 17947 transitions. [2021-06-05 05:21:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:21:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:23,424 INFO L225 Difference]: With dead ends: 4307 [2021-06-05 05:21:23,424 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 05:21:23,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:21:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 05:21:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3918. [2021-06-05 05:21:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196834311973449) internal successors, (16439), 3917 states have internal predecessors, (16439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16439 transitions. [2021-06-05 05:21:23,502 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16439 transitions. Word has length 23 [2021-06-05 05:21:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:23,502 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16439 transitions. [2021-06-05 05:21:23,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16439 transitions. [2021-06-05 05:21:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:23,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:23,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:23,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1095,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:23,708 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1413635765, now seen corresponding path program 349 times [2021-06-05 05:21:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:23,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630863607] [2021-06-05 05:21:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:23,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:23,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630863607] [2021-06-05 05:21:23,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630863607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:23,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468233497] [2021-06-05 05:21:23,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:23,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:23,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:23,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:23,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:23,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:23,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:24,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468233497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:24,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:24,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309861612] [2021-06-05 05:21:24,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:24,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:24,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:24,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:24,050 INFO L87 Difference]: Start difference. First operand 3918 states and 16439 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:24,501 INFO L93 Difference]: Finished difference Result 4176 states and 17415 transitions. [2021-06-05 05:21:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:24,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:24,509 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 05:21:24,510 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 05:21:24,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 05:21:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3927. [2021-06-05 05:21:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 4.195364238410596) internal successors, (16471), 3926 states have internal predecessors, (16471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 16471 transitions. [2021-06-05 05:21:24,569 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 16471 transitions. Word has length 23 [2021-06-05 05:21:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:24,570 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 16471 transitions. [2021-06-05 05:21:24,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 16471 transitions. [2021-06-05 05:21:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:24,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:24,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:24,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:24,776 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1839755463, now seen corresponding path program 350 times [2021-06-05 05:21:24,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:24,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485712363] [2021-06-05 05:21:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:24,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485712363] [2021-06-05 05:21:24,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485712363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531002413] [2021-06-05 05:21:24,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:24,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:24,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:24,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:24,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:25,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:25,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:25,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:25,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531002413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:25,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:25,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:25,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892679884] [2021-06-05 05:21:25,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:25,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:25,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:25,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:25,125 INFO L87 Difference]: Start difference. First operand 3927 states and 16471 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:25,602 INFO L93 Difference]: Finished difference Result 4175 states and 17410 transitions. [2021-06-05 05:21:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:25,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:25,610 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 05:21:25,611 INFO L226 Difference]: Without dead ends: 4147 [2021-06-05 05:21:25,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-06-05 05:21:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3920. [2021-06-05 05:21:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 05:21:25,664 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 05:21:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:25,664 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 05:21:25,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 05:21:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:25,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:25,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:25,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-06-05 05:21:25,870 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1552634111, now seen corresponding path program 351 times [2021-06-05 05:21:25,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:25,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898721262] [2021-06-05 05:21:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:25,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:25,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898721262] [2021-06-05 05:21:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898721262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:25,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217787630] [2021-06-05 05:21:25,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:26,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:21:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:26,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:21:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:26,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:26,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:26,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:26,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:26,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:26,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:21:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:26,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217787630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:26,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:26,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:26,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56038891] [2021-06-05 05:21:26,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:26,189 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:26,624 INFO L93 Difference]: Finished difference Result 4195 states and 17490 transitions. [2021-06-05 05:21:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:26,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:26,634 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 05:21:26,634 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 05:21:26,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 05:21:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3924. [2021-06-05 05:21:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 05:21:26,689 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 05:21:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:26,689 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 05:21:26,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 05:21:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:26,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:26,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:26,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 05:21:26,895 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1059416725, now seen corresponding path program 352 times [2021-06-05 05:21:26,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:26,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391021413] [2021-06-05 05:21:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:27,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391021413] [2021-06-05 05:21:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391021413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878267890] [2021-06-05 05:21:27,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:27,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:27,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:27,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:27,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:27,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:27,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:27,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:27,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:27,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878267890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:27,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:27,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:27,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345137696] [2021-06-05 05:21:27,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:27,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:27,250 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:28,044 INFO L93 Difference]: Finished difference Result 4209 states and 17554 transitions. [2021-06-05 05:21:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:21:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:28,053 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 05:21:28,054 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 05:21:28,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 691.6ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:21:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 05:21:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3920. [2021-06-05 05:21:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 05:21:28,113 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 05:21:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:28,113 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 05:21:28,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 05:21:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:28,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:28,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:28,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 05:21:28,319 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:28,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1994192981, now seen corresponding path program 353 times [2021-06-05 05:21:28,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:28,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937521633] [2021-06-05 05:21:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:28,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937521633] [2021-06-05 05:21:28,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937521633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762501420] [2021-06-05 05:21:28,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:28,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:28,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:28,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:28,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:28,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:28,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762501420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:28,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:28,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:28,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228376564] [2021-06-05 05:21:28,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:28,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:28,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:28,671 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:29,236 INFO L93 Difference]: Finished difference Result 4246 states and 17695 transitions. [2021-06-05 05:21:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:21:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:29,244 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 05:21:29,244 INFO L226 Difference]: Without dead ends: 4221 [2021-06-05 05:21:29,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-06-05 05:21:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3924. [2021-06-05 05:21:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 05:21:29,295 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 05:21:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:29,295 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 05:21:29,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 05:21:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:29,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:29,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:29,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:29,501 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash 981500449, now seen corresponding path program 354 times [2021-06-05 05:21:29,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:29,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881795197] [2021-06-05 05:21:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:29,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881795197] [2021-06-05 05:21:29,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881795197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60890023] [2021-06-05 05:21:29,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:29,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:21:29,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:29,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:29,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:29,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:29,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:21:29,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:29,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:29,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:29,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 05:21:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:29,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60890023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:29,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:29,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:21:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003852471] [2021-06-05 05:21:29,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:21:29,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:29,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:21:29,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:21:29,918 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:30,736 INFO L93 Difference]: Finished difference Result 4236 states and 17665 transitions. [2021-06-05 05:21:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:30,745 INFO L225 Difference]: With dead ends: 4236 [2021-06-05 05:21:30,745 INFO L226 Difference]: Without dead ends: 4215 [2021-06-05 05:21:30,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 673.8ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:21:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-06-05 05:21:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3916. [2021-06-05 05:21:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 05:21:30,803 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 05:21:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:30,803 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 05:21:30,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 05:21:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:30,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:30,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:31,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1106 [2021-06-05 05:21:31,010 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash 162475199, now seen corresponding path program 355 times [2021-06-05 05:21:31,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:31,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811216458] [2021-06-05 05:21:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:31,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:31,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811216458] [2021-06-05 05:21:31,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811216458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:31,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315926903] [2021-06-05 05:21:31,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:31,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:31,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:31,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:31,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:31,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:31,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315926903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:31,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:31,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:31,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488988178] [2021-06-05 05:21:31,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:31,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:31,320 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:32,187 INFO L93 Difference]: Finished difference Result 4751 states and 19722 transitions. [2021-06-05 05:21:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:32,197 INFO L225 Difference]: With dead ends: 4751 [2021-06-05 05:21:32,197 INFO L226 Difference]: Without dead ends: 4729 [2021-06-05 05:21:32,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 714.7ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:21:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2021-06-05 05:21:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 3920. [2021-06-05 05:21:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196989027813218) internal successors, (16448), 3919 states have internal predecessors, (16448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16448 transitions. [2021-06-05 05:21:32,255 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16448 transitions. Word has length 23 [2021-06-05 05:21:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:32,255 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16448 transitions. [2021-06-05 05:21:32,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16448 transitions. [2021-06-05 05:21:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:32,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:32,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:32,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 05:21:32,461 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 676002051, now seen corresponding path program 356 times [2021-06-05 05:21:32,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:32,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37761148] [2021-06-05 05:21:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:32,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:32,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37761148] [2021-06-05 05:21:32,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37761148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:32,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090505376] [2021-06-05 05:21:32,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:32,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:32,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:32,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:32,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:32,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:32,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:32,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:32,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090505376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:32,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:32,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744994737] [2021-06-05 05:21:32,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:32,787 INFO L87 Difference]: Start difference. First operand 3920 states and 16448 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:33,469 INFO L93 Difference]: Finished difference Result 4579 states and 19011 transitions. [2021-06-05 05:21:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:21:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:33,479 INFO L225 Difference]: With dead ends: 4579 [2021-06-05 05:21:33,479 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 05:21:33,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:21:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 05:21:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3924. [2021-06-05 05:21:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196788172317104) internal successors, (16464), 3923 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16464 transitions. [2021-06-05 05:21:33,541 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16464 transitions. Word has length 23 [2021-06-05 05:21:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:33,541 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16464 transitions. [2021-06-05 05:21:33,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16464 transitions. [2021-06-05 05:21:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:33,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:33,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:33,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-05 05:21:33,748 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1751713207, now seen corresponding path program 357 times [2021-06-05 05:21:33,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:33,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908236608] [2021-06-05 05:21:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:33,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:33,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908236608] [2021-06-05 05:21:33,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908236608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:33,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552808786] [2021-06-05 05:21:33,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:33,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:33,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:33,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:33,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:33,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:33,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:33,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:33,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:34,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552808786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:34,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:34,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:34,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218276577] [2021-06-05 05:21:34,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:34,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:34,078 INFO L87 Difference]: Start difference. First operand 3924 states and 16464 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:35,053 INFO L93 Difference]: Finished difference Result 4583 states and 19039 transitions. [2021-06-05 05:21:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:21:35,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:35,063 INFO L225 Difference]: With dead ends: 4583 [2021-06-05 05:21:35,063 INFO L226 Difference]: Without dead ends: 4562 [2021-06-05 05:21:35,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:21:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-05 05:21:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3916. [2021-06-05 05:21:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 05:21:35,130 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 05:21:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:35,130 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 05:21:35,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 05:21:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:35,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:35,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:35,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1114 [2021-06-05 05:21:35,336 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash 571982697, now seen corresponding path program 358 times [2021-06-05 05:21:35,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:35,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554585556] [2021-06-05 05:21:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:35,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:35,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554585556] [2021-06-05 05:21:35,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554585556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:35,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104753443] [2021-06-05 05:21:35,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:35,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:35,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:35,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:35,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:35,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:35,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:35,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:35,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104753443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:35,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:35,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:35,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386474403] [2021-06-05 05:21:35,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:35,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:35,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:35,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:35,647 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:36,366 INFO L93 Difference]: Finished difference Result 4620 states and 19163 transitions. [2021-06-05 05:21:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:21:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:36,376 INFO L225 Difference]: With dead ends: 4620 [2021-06-05 05:21:36,376 INFO L226 Difference]: Without dead ends: 4589 [2021-06-05 05:21:36,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:21:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-06-05 05:21:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3916. [2021-06-05 05:21:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 05:21:36,435 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 05:21:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:36,435 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 05:21:36,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 05:21:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:36,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:36,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:36,641 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2059528121, now seen corresponding path program 359 times [2021-06-05 05:21:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364690044] [2021-06-05 05:21:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:36,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:36,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364690044] [2021-06-05 05:21:36,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364690044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112002223] [2021-06-05 05:21:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:36,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:36,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:36,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:36,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:36,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:36,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:36,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:36,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112002223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:36,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:36,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356842347] [2021-06-05 05:21:36,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:36,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:36,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:36,966 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:37,996 INFO L93 Difference]: Finished difference Result 4481 states and 18639 transitions. [2021-06-05 05:21:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:21:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:38,005 INFO L225 Difference]: With dead ends: 4481 [2021-06-05 05:21:38,005 INFO L226 Difference]: Without dead ends: 4460 [2021-06-05 05:21:38,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 755.6ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:21:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-06-05 05:21:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3908. [2021-06-05 05:21:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.197850012797542) internal successors, (16401), 3907 states have internal predecessors, (16401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16401 transitions. [2021-06-05 05:21:38,065 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16401 transitions. Word has length 23 [2021-06-05 05:21:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:38,065 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16401 transitions. [2021-06-05 05:21:38,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16401 transitions. [2021-06-05 05:21:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:38,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:38,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:38,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:38,271 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:38,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1971726573, now seen corresponding path program 360 times [2021-06-05 05:21:38,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:38,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064365212] [2021-06-05 05:21:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:38,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064365212] [2021-06-05 05:21:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064365212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191903829] [2021-06-05 05:21:38,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:38,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:21:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:38,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:38,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:21:38,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:38,553 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-06-05 05:21:38,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:38,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:21:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:38,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191903829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:38,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:38,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:21:38,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721030436] [2021-06-05 05:21:38,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:21:38,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:21:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:21:38,623 INFO L87 Difference]: Start difference. First operand 3908 states and 16401 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:39,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:39,361 INFO L93 Difference]: Finished difference Result 4190 states and 17466 transitions. [2021-06-05 05:21:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:21:39,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:39,371 INFO L225 Difference]: With dead ends: 4190 [2021-06-05 05:21:39,371 INFO L226 Difference]: Without dead ends: 4164 [2021-06-05 05:21:39,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:21:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-06-05 05:21:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3915. [2021-06-05 05:21:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 4.196474195196729) internal successors, (16425), 3914 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16425 transitions. [2021-06-05 05:21:39,453 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16425 transitions. Word has length 23 [2021-06-05 05:21:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:39,453 INFO L482 AbstractCegarLoop]: Abstraction has 3915 states and 16425 transitions. [2021-06-05 05:21:39,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16425 transitions. [2021-06-05 05:21:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:39,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:39,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:39,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:39,660 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 930150505, now seen corresponding path program 361 times [2021-06-05 05:21:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:39,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993762738] [2021-06-05 05:21:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:39,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:39,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993762738] [2021-06-05 05:21:39,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993762738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:39,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378223793] [2021-06-05 05:21:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:39,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:39,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:39,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:39,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:39,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:39,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:21:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:39,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378223793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:39,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:39,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:39,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53027771] [2021-06-05 05:21:39,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:39,991 INFO L87 Difference]: Start difference. First operand 3915 states and 16425 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:40,476 INFO L93 Difference]: Finished difference Result 4159 states and 17347 transitions. [2021-06-05 05:21:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:40,484 INFO L225 Difference]: With dead ends: 4159 [2021-06-05 05:21:40,485 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 05:21:40,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 05:21:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3908. [2021-06-05 05:21:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.197082160225237) internal successors, (16398), 3907 states have internal predecessors, (16398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16398 transitions. [2021-06-05 05:21:40,541 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16398 transitions. Word has length 23 [2021-06-05 05:21:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:40,541 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16398 transitions. [2021-06-05 05:21:40,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16398 transitions. [2021-06-05 05:21:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:40,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:40,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:40,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1124,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:40,747 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash 44352225, now seen corresponding path program 362 times [2021-06-05 05:21:40,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:40,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314096035] [2021-06-05 05:21:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:40,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:40,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314096035] [2021-06-05 05:21:40,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314096035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:40,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392867557] [2021-06-05 05:21:40,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:40,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:40,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:40,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:40,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:40,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:40,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:40,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:40,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:41,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392867557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:41,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:41,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:41,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239297285] [2021-06-05 05:21:41,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:41,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:41,070 INFO L87 Difference]: Start difference. First operand 3908 states and 16398 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:41,657 INFO L93 Difference]: Finished difference Result 4325 states and 18000 transitions. [2021-06-05 05:21:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:21:41,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:41,666 INFO L225 Difference]: With dead ends: 4325 [2021-06-05 05:21:41,666 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 05:21:41,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 05:21:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 3901. [2021-06-05 05:21:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.197435897435898) internal successors, (16370), 3900 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16370 transitions. [2021-06-05 05:21:41,726 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16370 transitions. Word has length 23 [2021-06-05 05:21:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16370 transitions. [2021-06-05 05:21:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16370 transitions. [2021-06-05 05:21:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:41,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:41,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:41,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-06-05 05:21:41,932 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -140702057, now seen corresponding path program 363 times [2021-06-05 05:21:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:41,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907368646] [2021-06-05 05:21:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:42,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907368646] [2021-06-05 05:21:42,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907368646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:42,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887029789] [2021-06-05 05:21:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:42,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:21:42,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:42,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:42,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:42,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:42,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:42,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:42,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:42,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887029789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:42,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:42,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:42,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255009943] [2021-06-05 05:21:42,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:42,275 INFO L87 Difference]: Start difference. First operand 3901 states and 16370 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:42,691 INFO L93 Difference]: Finished difference Result 4120 states and 17191 transitions. [2021-06-05 05:21:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:42,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:42,700 INFO L225 Difference]: With dead ends: 4120 [2021-06-05 05:21:42,700 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 05:21:42,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 05:21:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3910. [2021-06-05 05:21:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.195958045535943) internal successors, (16402), 3909 states have internal predecessors, (16402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16402 transitions. [2021-06-05 05:21:42,762 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16402 transitions. Word has length 23 [2021-06-05 05:21:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:42,762 INFO L482 AbstractCegarLoop]: Abstraction has 3910 states and 16402 transitions. [2021-06-05 05:21:42,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16402 transitions. [2021-06-05 05:21:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:42,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:42,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:42,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1128,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:42,968 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1182278125, now seen corresponding path program 364 times [2021-06-05 05:21:42,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:42,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89496590] [2021-06-05 05:21:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:43,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:43,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89496590] [2021-06-05 05:21:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89496590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:43,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118375786] [2021-06-05 05:21:43,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:43,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:43,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:43,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:43,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:43,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:43,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118375786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:43,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:43,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:43,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704930254] [2021-06-05 05:21:43,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:43,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:43,321 INFO L87 Difference]: Start difference. First operand 3910 states and 16402 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:43,747 INFO L93 Difference]: Finished difference Result 4119 states and 17186 transitions. [2021-06-05 05:21:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:43,756 INFO L225 Difference]: With dead ends: 4119 [2021-06-05 05:21:43,756 INFO L226 Difference]: Without dead ends: 4091 [2021-06-05 05:21:43,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2021-06-05 05:21:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 3903. [2021-06-05 05:21:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.1973347001537675) internal successors, (16378), 3902 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16378 transitions. [2021-06-05 05:21:43,811 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16378 transitions. Word has length 23 [2021-06-05 05:21:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:43,812 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16378 transitions. [2021-06-05 05:21:43,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16378 transitions. [2021-06-05 05:21:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:43,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:43,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:44,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1130 [2021-06-05 05:21:44,018 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:44,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1469399477, now seen corresponding path program 365 times [2021-06-05 05:21:44,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:44,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942017010] [2021-06-05 05:21:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:44,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:44,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942017010] [2021-06-05 05:21:44,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942017010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:44,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453494496] [2021-06-05 05:21:44,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:44,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:44,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:44,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:44,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:44,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:44,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:44,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:44,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:44,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:44,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453494496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:44,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:44,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:44,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501031196] [2021-06-05 05:21:44,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:44,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:44,384 INFO L87 Difference]: Start difference. First operand 3903 states and 16378 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:44,783 INFO L93 Difference]: Finished difference Result 4143 states and 17282 transitions. [2021-06-05 05:21:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:44,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:44,791 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 05:21:44,792 INFO L226 Difference]: Without dead ends: 4117 [2021-06-05 05:21:44,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-06-05 05:21:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3907. [2021-06-05 05:21:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.197132616487456) internal successors, (16394), 3906 states have internal predecessors, (16394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16394 transitions. [2021-06-05 05:21:44,847 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16394 transitions. Word has length 23 [2021-06-05 05:21:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:44,848 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16394 transitions. [2021-06-05 05:21:44,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16394 transitions. [2021-06-05 05:21:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:44,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:44,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:45,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-06-05 05:21:45,054 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1962616863, now seen corresponding path program 366 times [2021-06-05 05:21:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:45,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515256741] [2021-06-05 05:21:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515256741] [2021-06-05 05:21:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515256741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909285538] [2021-06-05 05:21:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:45,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:21:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:21:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:45,300 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:21:45,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:21:45,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:45,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:45,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:45,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 05:21:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:45,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909285538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:45,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:45,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:21:45,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95202561] [2021-06-05 05:21:45,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:21:45,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:21:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:21:45,439 INFO L87 Difference]: Start difference. First operand 3907 states and 16394 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:46,173 INFO L93 Difference]: Finished difference Result 4222 states and 17600 transitions. [2021-06-05 05:21:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:46,182 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 05:21:46,182 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 05:21:46,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:21:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 05:21:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3903. [2021-06-05 05:21:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.1973347001537675) internal successors, (16378), 3902 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16378 transitions. [2021-06-05 05:21:46,241 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16378 transitions. Word has length 23 [2021-06-05 05:21:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:46,241 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16378 transitions. [2021-06-05 05:21:46,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16378 transitions. [2021-06-05 05:21:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:46,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:46,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:46,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 05:21:46,448 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1027840607, now seen corresponding path program 367 times [2021-06-05 05:21:46,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:46,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023680722] [2021-06-05 05:21:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:46,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023680722] [2021-06-05 05:21:46,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023680722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742427163] [2021-06-05 05:21:46,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:46,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:46,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:46,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:46,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:46,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:46,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:46,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742427163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:46,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:46,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:46,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385787737] [2021-06-05 05:21:46,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:46,804 INFO L87 Difference]: Start difference. First operand 3903 states and 16378 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:47,364 INFO L93 Difference]: Finished difference Result 4184 states and 17448 transitions. [2021-06-05 05:21:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:21:47,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:47,373 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 05:21:47,373 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 05:21:47,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 05:21:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3907. [2021-06-05 05:21:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.197132616487456) internal successors, (16394), 3906 states have internal predecessors, (16394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16394 transitions. [2021-06-05 05:21:47,431 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16394 transitions. Word has length 23 [2021-06-05 05:21:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:47,431 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16394 transitions. [2021-06-05 05:21:47,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16394 transitions. [2021-06-05 05:21:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:47,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:47,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:47,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1138,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:47,638 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2040533139, now seen corresponding path program 368 times [2021-06-05 05:21:47,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:47,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329880991] [2021-06-05 05:21:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:47,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:47,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329880991] [2021-06-05 05:21:47,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329880991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:47,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197113889] [2021-06-05 05:21:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:47,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:47,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:47,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:47,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:47,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:47,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:47,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197113889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:47,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:47,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:47,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534692347] [2021-06-05 05:21:47,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:47,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:47,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:47,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:47,987 INFO L87 Difference]: Start difference. First operand 3907 states and 16394 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:48,794 INFO L93 Difference]: Finished difference Result 4176 states and 17426 transitions. [2021-06-05 05:21:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:21:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:48,827 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 05:21:48,827 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 05:21:48,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 744.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:21:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 05:21:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3901. [2021-06-05 05:21:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.197435897435898) internal successors, (16370), 3900 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16370 transitions. [2021-06-05 05:21:48,879 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16370 transitions. Word has length 23 [2021-06-05 05:21:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:48,879 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16370 transitions. [2021-06-05 05:21:48,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16370 transitions. [2021-06-05 05:21:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:48,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:48,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:49,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:49,085 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 536947987, now seen corresponding path program 369 times [2021-06-05 05:21:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:49,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144237959] [2021-06-05 05:21:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:49,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:49,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144237959] [2021-06-05 05:21:49,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144237959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:49,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631912445] [2021-06-05 05:21:49,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:49,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:21:49,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:49,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:49,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:49,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:49,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:49,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:21:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:49,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631912445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:49,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:49,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127652961] [2021-06-05 05:21:49,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:49,400 INFO L87 Difference]: Start difference. First operand 3901 states and 16370 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:49,908 INFO L93 Difference]: Finished difference Result 4404 states and 18312 transitions. [2021-06-05 05:21:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:21:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:49,918 INFO L225 Difference]: With dead ends: 4404 [2021-06-05 05:21:49,918 INFO L226 Difference]: Without dead ends: 4373 [2021-06-05 05:21:49,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:21:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2021-06-05 05:21:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 3903. [2021-06-05 05:21:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196822142491031) internal successors, (16376), 3902 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16376 transitions. [2021-06-05 05:21:49,979 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16376 transitions. Word has length 23 [2021-06-05 05:21:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:49,979 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16376 transitions. [2021-06-05 05:21:49,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16376 transitions. [2021-06-05 05:21:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:49,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:49,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:50,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:50,186 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1577183785, now seen corresponding path program 370 times [2021-06-05 05:21:50,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:50,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235588522] [2021-06-05 05:21:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:50,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:50,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235588522] [2021-06-05 05:21:50,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235588522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:50,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545069896] [2021-06-05 05:21:50,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:50,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:50,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:50,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:50,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:50,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:50,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:50,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:50,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545069896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:50,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:50,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991155780] [2021-06-05 05:21:50,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:50,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:50,517 INFO L87 Difference]: Start difference. First operand 3903 states and 16376 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:51,128 INFO L93 Difference]: Finished difference Result 4322 states and 17993 transitions. [2021-06-05 05:21:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:21:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:51,137 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 05:21:51,137 INFO L226 Difference]: Without dead ends: 4297 [2021-06-05 05:21:51,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 577.7ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:21:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-06-05 05:21:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3907. [2021-06-05 05:21:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.196620583717358) internal successors, (16392), 3906 states have internal predecessors, (16392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16392 transitions. [2021-06-05 05:21:51,194 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16392 transitions. Word has length 23 [2021-06-05 05:21:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:51,194 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16392 transitions. [2021-06-05 05:21:51,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16392 transitions. [2021-06-05 05:21:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:51,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:51,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:51,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 05:21:51,400 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:51,400 INFO L82 PathProgramCache]: Analyzing trace with hash 564491253, now seen corresponding path program 371 times [2021-06-05 05:21:51,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:51,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433510707] [2021-06-05 05:21:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:51,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:51,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433510707] [2021-06-05 05:21:51,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433510707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:51,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705609660] [2021-06-05 05:21:51,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:51,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:51,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:51,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:51,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:51,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:51,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:51,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:51,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:51,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705609660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:51,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:51,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:51,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657964205] [2021-06-05 05:21:51,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:51,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:51,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:51,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:51,726 INFO L87 Difference]: Start difference. First operand 3907 states and 16392 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:52,650 INFO L93 Difference]: Finished difference Result 4340 states and 18073 transitions. [2021-06-05 05:21:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:21:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:52,660 INFO L225 Difference]: With dead ends: 4340 [2021-06-05 05:21:52,660 INFO L226 Difference]: Without dead ends: 4319 [2021-06-05 05:21:52,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 771.2ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:21:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2021-06-05 05:21:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 3899. [2021-06-05 05:21:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196511031298102) internal successors, (16358), 3898 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16358 transitions. [2021-06-05 05:21:52,723 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16358 transitions. Word has length 23 [2021-06-05 05:21:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:52,723 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16358 transitions. [2021-06-05 05:21:52,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16358 transitions. [2021-06-05 05:21:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:52,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:52,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:52,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 05:21:52,930 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1581030667, now seen corresponding path program 372 times [2021-06-05 05:21:52,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073862938] [2021-06-05 05:21:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:53,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073862938] [2021-06-05 05:21:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073862938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644827674] [2021-06-05 05:21:53,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:53,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:21:53,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:53,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:53,213 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 05:21:53,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 05:21:53,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:53,250 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 05:21:53,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:53,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:14 [2021-06-05 05:21:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:53,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644827674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:53,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:53,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:21:53,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84452637] [2021-06-05 05:21:53,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:21:53,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:21:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:21:53,294 INFO L87 Difference]: Start difference. First operand 3899 states and 16358 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:54,300 INFO L93 Difference]: Finished difference Result 4355 states and 18141 transitions. [2021-06-05 05:21:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:21:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:54,310 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 05:21:54,310 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 05:21:54,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:21:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 05:21:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3903. [2021-06-05 05:21:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196822142491031) internal successors, (16376), 3902 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16376 transitions. [2021-06-05 05:21:54,368 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16376 transitions. Word has length 23 [2021-06-05 05:21:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:54,368 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16376 transitions. [2021-06-05 05:21:54,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16376 transitions. [2021-06-05 05:21:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:54,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:54,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:54,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:54,575 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash -995696715, now seen corresponding path program 373 times [2021-06-05 05:21:54,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:54,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971152367] [2021-06-05 05:21:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:54,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:54,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971152367] [2021-06-05 05:21:54,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971152367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:54,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386880604] [2021-06-05 05:21:54,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:54,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:54,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:54,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:54,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:54,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:54,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:54,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:54,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:54,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386880604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:54,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:54,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:54,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696382667] [2021-06-05 05:21:54,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:54,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:54,906 INFO L87 Difference]: Start difference. First operand 3903 states and 16376 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:55,375 INFO L93 Difference]: Finished difference Result 4217 states and 17575 transitions. [2021-06-05 05:21:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:21:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:55,384 INFO L225 Difference]: With dead ends: 4217 [2021-06-05 05:21:55,384 INFO L226 Difference]: Without dead ends: 4191 [2021-06-05 05:21:55,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:21:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-06-05 05:21:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3907. [2021-06-05 05:21:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.196620583717358) internal successors, (16392), 3906 states have internal predecessors, (16392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16392 transitions. [2021-06-05 05:21:55,442 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16392 transitions. Word has length 23 [2021-06-05 05:21:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:55,442 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16392 transitions. [2021-06-05 05:21:55,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16392 transitions. [2021-06-05 05:21:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:55,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:55,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:55,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:55,648 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash 617870019, now seen corresponding path program 374 times [2021-06-05 05:21:55,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:55,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561505796] [2021-06-05 05:21:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:55,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561505796] [2021-06-05 05:21:55,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561505796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:55,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029832743] [2021-06-05 05:21:55,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:55,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:55,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:55,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:55,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:55,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:55,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:55,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:55,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:21:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:55,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029832743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:55,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:55,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261121047] [2021-06-05 05:21:55,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:55,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:55,960 INFO L87 Difference]: Start difference. First operand 3907 states and 16392 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:56,786 INFO L93 Difference]: Finished difference Result 4216 states and 17584 transitions. [2021-06-05 05:21:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:21:56,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:56,794 INFO L225 Difference]: With dead ends: 4216 [2021-06-05 05:21:56,794 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 05:21:56,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:21:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 05:21:56,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3899. [2021-06-05 05:21:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196511031298102) internal successors, (16358), 3898 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16358 transitions. [2021-06-05 05:21:56,847 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16358 transitions. Word has length 23 [2021-06-05 05:21:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:56,847 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16358 transitions. [2021-06-05 05:21:56,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16358 transitions. [2021-06-05 05:21:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:56,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:56,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:57,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 05:21:57,053 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 61981813, now seen corresponding path program 375 times [2021-06-05 05:21:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:57,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397106476] [2021-06-05 05:21:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:57,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397106476] [2021-06-05 05:21:57,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397106476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396091910] [2021-06-05 05:21:57,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:57,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:21:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:57,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:57,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:57,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:57,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:57,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:57,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396091910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:57,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:57,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:57,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699833688] [2021-06-05 05:21:57,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:57,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:57,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:57,392 INFO L87 Difference]: Start difference. First operand 3899 states and 16358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:57,755 INFO L93 Difference]: Finished difference Result 4126 states and 17214 transitions. [2021-06-05 05:21:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:21:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:57,764 INFO L225 Difference]: With dead ends: 4126 [2021-06-05 05:21:57,764 INFO L226 Difference]: Without dead ends: 4100 [2021-06-05 05:21:57,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-06-05 05:21:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3908. [2021-06-05 05:21:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.195034553365754) internal successors, (16390), 3907 states have internal predecessors, (16390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16390 transitions. [2021-06-05 05:21:57,831 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16390 transitions. Word has length 23 [2021-06-05 05:21:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:57,832 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16390 transitions. [2021-06-05 05:21:57,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16390 transitions. [2021-06-05 05:21:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:57,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:57,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:58,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1156,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:58,039 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -979594255, now seen corresponding path program 376 times [2021-06-05 05:21:58,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:58,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665242487] [2021-06-05 05:21:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:58,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665242487] [2021-06-05 05:21:58,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665242487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336541684] [2021-06-05 05:21:58,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:58,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:58,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:58,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:58,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:58,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:58,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:58,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:58,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:58,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336541684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:58,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:58,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213080923] [2021-06-05 05:21:58,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:58,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:58,416 INFO L87 Difference]: Start difference. First operand 3908 states and 16390 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:58,850 INFO L93 Difference]: Finished difference Result 4083 states and 17047 transitions. [2021-06-05 05:21:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:21:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:58,859 INFO L225 Difference]: With dead ends: 4083 [2021-06-05 05:21:58,859 INFO L226 Difference]: Without dead ends: 4055 [2021-06-05 05:21:58,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-06-05 05:21:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3901. [2021-06-05 05:21:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196410256410257) internal successors, (16366), 3900 states have internal predecessors, (16366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16366 transitions. [2021-06-05 05:21:58,913 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16366 transitions. Word has length 23 [2021-06-05 05:21:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:58,913 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16366 transitions. [2021-06-05 05:21:58,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16366 transitions. [2021-06-05 05:21:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:58,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:58,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:59,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-06-05 05:21:59,119 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:59,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1266715607, now seen corresponding path program 377 times [2021-06-05 05:21:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:59,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483321281] [2021-06-05 05:21:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:59,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483321281] [2021-06-05 05:21:59,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483321281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908039969] [2021-06-05 05:21:59,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:59,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:21:59,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:59,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:21:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:59,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:59,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:21:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:59,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908039969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:59,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:21:59,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331663331] [2021-06-05 05:21:59,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:21:59,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:21:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:21:59,456 INFO L87 Difference]: Start difference. First operand 3901 states and 16366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:59,833 INFO L93 Difference]: Finished difference Result 4147 states and 17297 transitions. [2021-06-05 05:21:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:21:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:21:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:59,841 INFO L225 Difference]: With dead ends: 4147 [2021-06-05 05:21:59,841 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 05:21:59,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 05:21:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3905. [2021-06-05 05:21:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196209016393443) internal successors, (16382), 3904 states have internal predecessors, (16382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16382 transitions. [2021-06-05 05:21:59,894 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16382 transitions. Word has length 23 [2021-06-05 05:21:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:59,895 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16382 transitions. [2021-06-05 05:21:59,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16382 transitions. [2021-06-05 05:21:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:21:59,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:59,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:00,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:00,100 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1759932993, now seen corresponding path program 378 times [2021-06-05 05:22:00,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:00,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116114690] [2021-06-05 05:22:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:00,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:00,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116114690] [2021-06-05 05:22:00,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116114690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:00,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661382390] [2021-06-05 05:22:00,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:00,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:22:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:00,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:00,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:00,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:00,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:22:00,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:00,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:00,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:00,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:22:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:00,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661382390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:00,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:00,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:22:00,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263262392] [2021-06-05 05:22:00,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:22:00,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:22:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:22:00,480 INFO L87 Difference]: Start difference. First operand 3905 states and 16382 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:01,286 INFO L93 Difference]: Finished difference Result 4161 states and 17362 transitions. [2021-06-05 05:22:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:01,295 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 05:22:01,295 INFO L226 Difference]: Without dead ends: 4140 [2021-06-05 05:22:01,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:22:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-06-05 05:22:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3901. [2021-06-05 05:22:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196410256410257) internal successors, (16366), 3900 states have internal predecessors, (16366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16366 transitions. [2021-06-05 05:22:01,374 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16366 transitions. Word has length 23 [2021-06-05 05:22:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:01,374 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16366 transitions. [2021-06-05 05:22:01,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16366 transitions. [2021-06-05 05:22:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:01,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:01,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:01,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:01,580 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -825156737, now seen corresponding path program 379 times [2021-06-05 05:22:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:01,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243229445] [2021-06-05 05:22:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:01,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:01,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243229445] [2021-06-05 05:22:01,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243229445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878490076] [2021-06-05 05:22:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:01,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:01,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:01,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:01,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:01,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:01,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:22:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:01,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878490076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:01,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:01,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386397954] [2021-06-05 05:22:01,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:01,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:01,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:01,924 INFO L87 Difference]: Start difference. First operand 3901 states and 16366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:02,478 INFO L93 Difference]: Finished difference Result 4152 states and 17321 transitions. [2021-06-05 05:22:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:22:02,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:02,487 INFO L225 Difference]: With dead ends: 4152 [2021-06-05 05:22:02,487 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 05:22:02,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:22:02,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 05:22:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3905. [2021-06-05 05:22:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196209016393443) internal successors, (16382), 3904 states have internal predecessors, (16382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16382 transitions. [2021-06-05 05:22:02,548 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16382 transitions. Word has length 23 [2021-06-05 05:22:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:02,549 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16382 transitions. [2021-06-05 05:22:02,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16382 transitions. [2021-06-05 05:22:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:02,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:02,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:02,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-05 05:22:02,755 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1837849269, now seen corresponding path program 380 times [2021-06-05 05:22:02,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:02,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586314571] [2021-06-05 05:22:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:02,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:02,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586314571] [2021-06-05 05:22:02,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586314571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:02,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46154108] [2021-06-05 05:22:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:02,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:02,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:02,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:02,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:02,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:02,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:02,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:22:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:03,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46154108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:03,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:03,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:03,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031546938] [2021-06-05 05:22:03,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:03,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:03,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:03,101 INFO L87 Difference]: Start difference. First operand 3905 states and 16382 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:03,842 INFO L93 Difference]: Finished difference Result 4162 states and 17371 transitions. [2021-06-05 05:22:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:22:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:03,851 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 05:22:03,851 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 05:22:03,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 675.9ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 05:22:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3897. [2021-06-05 05:22:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.19635523613963) internal successors, (16349), 3896 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16349 transitions. [2021-06-05 05:22:03,909 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16349 transitions. Word has length 23 [2021-06-05 05:22:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:03,909 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16349 transitions. [2021-06-05 05:22:03,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16349 transitions. [2021-06-05 05:22:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:03,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:03,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:04,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 05:22:04,115 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1441002921, now seen corresponding path program 381 times [2021-06-05 05:22:04,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:04,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61787008] [2021-06-05 05:22:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:04,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:04,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61787008] [2021-06-05 05:22:04,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61787008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675356170] [2021-06-05 05:22:04,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:04,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:22:04,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:04,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:04,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:04,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:04,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:04,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:04,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675356170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:04,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084488814] [2021-06-05 05:22:04,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:04,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:04,428 INFO L87 Difference]: Start difference. First operand 3897 states and 16349 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:05,237 INFO L93 Difference]: Finished difference Result 4278 states and 17840 transitions. [2021-06-05 05:22:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:22:05,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:05,247 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 05:22:05,247 INFO L226 Difference]: Without dead ends: 4256 [2021-06-05 05:22:05,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 614.2ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-06-05 05:22:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3905. [2021-06-05 05:22:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196465163934426) internal successors, (16383), 3904 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16383 transitions. [2021-06-05 05:22:05,313 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16383 transitions. Word has length 23 [2021-06-05 05:22:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:05,313 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16383 transitions. [2021-06-05 05:22:05,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16383 transitions. [2021-06-05 05:22:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:05,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:05,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:05,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1170 [2021-06-05 05:22:05,520 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:05,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:05,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2026336873, now seen corresponding path program 382 times [2021-06-05 05:22:05,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:05,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031275717] [2021-06-05 05:22:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:05,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031275717] [2021-06-05 05:22:05,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031275717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:05,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107036598] [2021-06-05 05:22:05,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:05,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:05,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:05,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:05,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:05,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:05,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:05,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107036598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:05,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:05,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:05,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980045071] [2021-06-05 05:22:05,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:05,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:05,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:05,845 INFO L87 Difference]: Start difference. First operand 3905 states and 16383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:06,412 INFO L93 Difference]: Finished difference Result 4265 states and 17753 transitions. [2021-06-05 05:22:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:22:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:06,422 INFO L225 Difference]: With dead ends: 4265 [2021-06-05 05:22:06,422 INFO L226 Difference]: Without dead ends: 4239 [2021-06-05 05:22:06,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-06-05 05:22:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3909. [2021-06-05 05:22:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.1962640736949846) internal successors, (16399), 3908 states have internal predecessors, (16399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16399 transitions. [2021-06-05 05:22:06,487 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16399 transitions. Word has length 23 [2021-06-05 05:22:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:06,487 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16399 transitions. [2021-06-05 05:22:06,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16399 transitions. [2021-06-05 05:22:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:06,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:06,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:06,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:06,694 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash -655063689, now seen corresponding path program 383 times [2021-06-05 05:22:06,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:06,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784715096] [2021-06-05 05:22:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:06,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:06,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784715096] [2021-06-05 05:22:06,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784715096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:06,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950569655] [2021-06-05 05:22:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:06,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:22:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:06,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:06,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:06,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:06,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:06,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:06,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:07,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950569655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:07,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:07,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591256848] [2021-06-05 05:22:07,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:07,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:07,022 INFO L87 Difference]: Start difference. First operand 3909 states and 16399 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:08,049 INFO L93 Difference]: Finished difference Result 4213 states and 17570 transitions. [2021-06-05 05:22:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:22:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:08,058 INFO L225 Difference]: With dead ends: 4213 [2021-06-05 05:22:08,058 INFO L226 Difference]: Without dead ends: 4192 [2021-06-05 05:22:08,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:22:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2021-06-05 05:22:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 3901. [2021-06-05 05:22:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196153846153846) internal successors, (16365), 3900 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16365 transitions. [2021-06-05 05:22:08,111 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16365 transitions. Word has length 23 [2021-06-05 05:22:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:08,111 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16365 transitions. [2021-06-05 05:22:08,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16365 transitions. [2021-06-05 05:22:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:08,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:08,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:08,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:08,317 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash -94502465, now seen corresponding path program 384 times [2021-06-05 05:22:08,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:08,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699207131] [2021-06-05 05:22:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:08,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699207131] [2021-06-05 05:22:08,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699207131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65533666] [2021-06-05 05:22:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:08,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:22:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:08,587 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 05:22:08,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:22:08,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:08,613 INFO L628 ElimStorePlain]: treesize reduction 53, result has 20.9 percent of original size [2021-06-05 05:22:08,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:08,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:22:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:08,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65533666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:08,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:08,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:22:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10109742] [2021-06-05 05:22:08,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:22:08,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:22:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:22:08,656 INFO L87 Difference]: Start difference. First operand 3901 states and 16365 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:09,353 INFO L93 Difference]: Finished difference Result 4156 states and 17350 transitions. [2021-06-05 05:22:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:09,362 INFO L225 Difference]: With dead ends: 4156 [2021-06-05 05:22:09,362 INFO L226 Difference]: Without dead ends: 4133 [2021-06-05 05:22:09,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:22:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-06-05 05:22:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3897. [2021-06-05 05:22:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.19635523613963) internal successors, (16349), 3896 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16349 transitions. [2021-06-05 05:22:09,419 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16349 transitions. Word has length 23 [2021-06-05 05:22:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:09,419 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16349 transitions. [2021-06-05 05:22:09,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16349 transitions. [2021-06-05 05:22:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:09,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:09,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:09,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 05:22:09,625 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 577314687, now seen corresponding path program 385 times [2021-06-05 05:22:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:09,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670110731] [2021-06-05 05:22:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:09,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:09,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670110731] [2021-06-05 05:22:09,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670110731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932549664] [2021-06-05 05:22:09,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:09,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:09,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:09,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:09,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:09,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:09,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:09,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932549664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:09,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:09,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:09,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86942412] [2021-06-05 05:22:09,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:09,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:09,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:09,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:09,935 INFO L87 Difference]: Start difference. First operand 3897 states and 16349 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:10,647 INFO L93 Difference]: Finished difference Result 4295 states and 17907 transitions. [2021-06-05 05:22:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:10,656 INFO L225 Difference]: With dead ends: 4295 [2021-06-05 05:22:10,656 INFO L226 Difference]: Without dead ends: 4273 [2021-06-05 05:22:10,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2021-06-05 05:22:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 3905. [2021-06-05 05:22:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196465163934426) internal successors, (16383), 3904 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16383 transitions. [2021-06-05 05:22:10,715 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16383 transitions. Word has length 23 [2021-06-05 05:22:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:10,715 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16383 transitions. [2021-06-05 05:22:10,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16383 transitions. [2021-06-05 05:22:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:10,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:10,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:10,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:10,921 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1090841539, now seen corresponding path program 386 times [2021-06-05 05:22:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:10,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039654457] [2021-06-05 05:22:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:11,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039654457] [2021-06-05 05:22:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039654457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:11,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360332154] [2021-06-05 05:22:11,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:11,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:11,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:11,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:11,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:11,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:11,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:11,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:11,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:11,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360332154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:11,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:11,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:11,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238278189] [2021-06-05 05:22:11,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:11,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:11,270 INFO L87 Difference]: Start difference. First operand 3905 states and 16383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:11,888 INFO L93 Difference]: Finished difference Result 4213 states and 17561 transitions. [2021-06-05 05:22:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:22:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:11,898 INFO L225 Difference]: With dead ends: 4213 [2021-06-05 05:22:11,898 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 05:22:11,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:22:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 05:22:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3909. [2021-06-05 05:22:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.1962640736949846) internal successors, (16399), 3908 states have internal predecessors, (16399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16399 transitions. [2021-06-05 05:22:11,961 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16399 transitions. Word has length 23 [2021-06-05 05:22:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:11,961 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16399 transitions. [2021-06-05 05:22:11,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16399 transitions. [2021-06-05 05:22:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:11,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:11,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:12,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:12,168 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2128414601, now seen corresponding path program 387 times [2021-06-05 05:22:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:12,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217587818] [2021-06-05 05:22:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:12,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:12,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217587818] [2021-06-05 05:22:12,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217587818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:12,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717429542] [2021-06-05 05:22:12,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:12,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:12,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:12,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:12,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:12,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:12,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:12,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:12,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:12,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:12,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717429542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:12,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:12,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:12,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607714497] [2021-06-05 05:22:12,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:12,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:12,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:12,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:12,486 INFO L87 Difference]: Start difference. First operand 3909 states and 16399 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:13,228 INFO L93 Difference]: Finished difference Result 4215 states and 17580 transitions. [2021-06-05 05:22:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:22:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:13,237 INFO L225 Difference]: With dead ends: 4215 [2021-06-05 05:22:13,237 INFO L226 Difference]: Without dead ends: 4194 [2021-06-05 05:22:13,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:22:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-06-05 05:22:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3901. [2021-06-05 05:22:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196153846153846) internal successors, (16365), 3900 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16365 transitions. [2021-06-05 05:22:13,301 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16365 transitions. Word has length 23 [2021-06-05 05:22:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:13,301 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16365 transitions. [2021-06-05 05:22:13,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16365 transitions. [2021-06-05 05:22:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:13,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:13,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:13,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:13,508 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1957599669, now seen corresponding path program 388 times [2021-06-05 05:22:13,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:13,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170463468] [2021-06-05 05:22:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:13,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170463468] [2021-06-05 05:22:13,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170463468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285640789] [2021-06-05 05:22:13,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:13,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:13,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:13,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:13,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:13,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:13,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:13,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:13,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:13,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285640789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:13,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229740920] [2021-06-05 05:22:13,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:13,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:13,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:13,842 INFO L87 Difference]: Start difference. First operand 3901 states and 16365 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:14,360 INFO L93 Difference]: Finished difference Result 4183 states and 17465 transitions. [2021-06-05 05:22:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:22:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:14,369 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 05:22:14,369 INFO L226 Difference]: Without dead ends: 4160 [2021-06-05 05:22:14,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 464.3ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:22:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-06-05 05:22:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3895. [2021-06-05 05:22:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 4.196456086286595) internal successors, (16341), 3894 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 16341 transitions. [2021-06-05 05:22:14,427 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 16341 transitions. Word has length 23 [2021-06-05 05:22:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:14,427 INFO L482 AbstractCegarLoop]: Abstraction has 3895 states and 16341 transitions. [2021-06-05 05:22:14,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 16341 transitions. [2021-06-05 05:22:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:14,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:14,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:14,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:14,634 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1100599921, now seen corresponding path program 389 times [2021-06-05 05:22:14,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:14,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359025696] [2021-06-05 05:22:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:14,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:14,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359025696] [2021-06-05 05:22:14,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359025696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:14,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818919609] [2021-06-05 05:22:14,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:14,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:22:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:14,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:14,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:14,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:14,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:14,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:14,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:14,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818919609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:14,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:14,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749808964] [2021-06-05 05:22:14,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:14,943 INFO L87 Difference]: Start difference. First operand 3895 states and 16341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:15,763 INFO L93 Difference]: Finished difference Result 4664 states and 19376 transitions. [2021-06-05 05:22:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:22:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:15,773 INFO L225 Difference]: With dead ends: 4664 [2021-06-05 05:22:15,773 INFO L226 Difference]: Without dead ends: 4642 [2021-06-05 05:22:15,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:22:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2021-06-05 05:22:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 3899. [2021-06-05 05:22:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196767573114418) internal successors, (16359), 3898 states have internal predecessors, (16359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16359 transitions. [2021-06-05 05:22:15,838 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16359 transitions. Word has length 23 [2021-06-05 05:22:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:15,838 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16359 transitions. [2021-06-05 05:22:15,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16359 transitions. [2021-06-05 05:22:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:15,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:15,844 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:16,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-06-05 05:22:16,045 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1614126773, now seen corresponding path program 390 times [2021-06-05 05:22:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:16,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480344155] [2021-06-05 05:22:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:16,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:16,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480344155] [2021-06-05 05:22:16,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480344155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:16,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460366803] [2021-06-05 05:22:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:16,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:16,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:16,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:16,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:16,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:16,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:16,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:16,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460366803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:16,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:16,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:16,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933825795] [2021-06-05 05:22:16,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:16,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:16,374 INFO L87 Difference]: Start difference. First operand 3899 states and 16359 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:17,048 INFO L93 Difference]: Finished difference Result 4543 states and 18870 transitions. [2021-06-05 05:22:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:17,057 INFO L225 Difference]: With dead ends: 4543 [2021-06-05 05:22:17,057 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 05:22:17,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 05:22:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3903. [2021-06-05 05:22:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196565863659662) internal successors, (16375), 3902 states have internal predecessors, (16375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16375 transitions. [2021-06-05 05:22:17,119 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16375 transitions. Word has length 23 [2021-06-05 05:22:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:17,119 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16375 transitions. [2021-06-05 05:22:17,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16375 transitions. [2021-06-05 05:22:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:17,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:17,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:17,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-05 05:22:17,325 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1605129367, now seen corresponding path program 391 times [2021-06-05 05:22:17,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:17,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666473192] [2021-06-05 05:22:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:17,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:17,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666473192] [2021-06-05 05:22:17,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666473192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062229335] [2021-06-05 05:22:17,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:17,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:17,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:17,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:17,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:17,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062229335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:17,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008648415] [2021-06-05 05:22:17,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:17,768 INFO L87 Difference]: Start difference. First operand 3903 states and 16375 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:18,729 INFO L93 Difference]: Finished difference Result 4517 states and 18778 transitions. [2021-06-05 05:22:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:22:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:18,738 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 05:22:18,738 INFO L226 Difference]: Without dead ends: 4496 [2021-06-05 05:22:18,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:22:18,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2021-06-05 05:22:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 3895. [2021-06-05 05:22:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 4.196456086286595) internal successors, (16341), 3894 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 16341 transitions. [2021-06-05 05:22:18,796 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 16341 transitions. Word has length 23 [2021-06-05 05:22:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:18,796 INFO L482 AbstractCegarLoop]: Abstraction has 3895 states and 16341 transitions. [2021-06-05 05:22:18,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 16341 transitions. [2021-06-05 05:22:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:18,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:18,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:19,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:19,002 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1510107419, now seen corresponding path program 392 times [2021-06-05 05:22:19,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:19,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051335229] [2021-06-05 05:22:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:19,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051335229] [2021-06-05 05:22:19,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051335229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555293554] [2021-06-05 05:22:19,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:19,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:19,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:19,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:19,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:19,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:19,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:19,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:19,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:19,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555293554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:19,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:19,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:19,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836671858] [2021-06-05 05:22:19,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:19,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:19,313 INFO L87 Difference]: Start difference. First operand 3895 states and 16341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:19,973 INFO L93 Difference]: Finished difference Result 4588 states and 19032 transitions. [2021-06-05 05:22:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:19,984 INFO L225 Difference]: With dead ends: 4588 [2021-06-05 05:22:19,984 INFO L226 Difference]: Without dead ends: 4557 [2021-06-05 05:22:19,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-06-05 05:22:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 3893. [2021-06-05 05:22:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3892 states have (on average 4.195015416238438) internal successors, (16327), 3892 states have internal predecessors, (16327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16327 transitions. [2021-06-05 05:22:20,044 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16327 transitions. Word has length 23 [2021-06-05 05:22:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:20,044 INFO L482 AbstractCegarLoop]: Abstraction has 3893 states and 16327 transitions. [2021-06-05 05:22:20,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16327 transitions. [2021-06-05 05:22:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:20,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:20,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:20,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:20,251 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2097852741, now seen corresponding path program 393 times [2021-06-05 05:22:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:20,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674755599] [2021-06-05 05:22:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:20,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674755599] [2021-06-05 05:22:20,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674755599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771691990] [2021-06-05 05:22:20,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:20,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:20,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:20,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:20,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:20,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:20,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:20,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771691990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:20,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:20,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023832698] [2021-06-05 05:22:20,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:20,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:20,603 INFO L87 Difference]: Start difference. First operand 3893 states and 16327 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:21,316 INFO L93 Difference]: Finished difference Result 4418 states and 18376 transitions. [2021-06-05 05:22:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:21,325 INFO L225 Difference]: With dead ends: 4418 [2021-06-05 05:22:21,326 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 05:22:21,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 05:22:21,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3885. [2021-06-05 05:22:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 4.196189495365602) internal successors, (16298), 3884 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 16298 transitions. [2021-06-05 05:22:21,380 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 16298 transitions. Word has length 23 [2021-06-05 05:22:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:21,380 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 16298 transitions. [2021-06-05 05:22:21,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 16298 transitions. [2021-06-05 05:22:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:21,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:21,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:21,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:21,586 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash 39821831, now seen corresponding path program 394 times [2021-06-05 05:22:21,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:21,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618039482] [2021-06-05 05:22:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:21,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618039482] [2021-06-05 05:22:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618039482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234319887] [2021-06-05 05:22:21,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:21,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:21,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:21,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:21,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:21,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:21,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:21,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:21,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:21,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234319887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:21,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:21,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:21,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119915776] [2021-06-05 05:22:21,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:21,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:21,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:21,901 INFO L87 Difference]: Start difference. First operand 3885 states and 16298 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:22,666 INFO L93 Difference]: Finished difference Result 4472 states and 18609 transitions. [2021-06-05 05:22:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:22:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:22,675 INFO L225 Difference]: With dead ends: 4472 [2021-06-05 05:22:22,675 INFO L226 Difference]: Without dead ends: 4450 [2021-06-05 05:22:22,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:22:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-06-05 05:22:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3893. [2021-06-05 05:22:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3892 states have (on average 4.196300102774923) internal successors, (16332), 3892 states have internal predecessors, (16332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16332 transitions. [2021-06-05 05:22:22,730 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16332 transitions. Word has length 23 [2021-06-05 05:22:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:22,730 INFO L482 AbstractCegarLoop]: Abstraction has 3893 states and 16332 transitions. [2021-06-05 05:22:22,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16332 transitions. [2021-06-05 05:22:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:22,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:22,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:22,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1198,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:22,936 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash 553348683, now seen corresponding path program 395 times [2021-06-05 05:22:22,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:22,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097705686] [2021-06-05 05:22:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097705686] [2021-06-05 05:22:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097705686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:23,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780434893] [2021-06-05 05:22:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:23,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:23,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:23,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:23,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:23,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:23,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:23,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:23,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:23,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780434893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:23,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:23,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106621968] [2021-06-05 05:22:23,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:23,265 INFO L87 Difference]: Start difference. First operand 3893 states and 16332 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:23,927 INFO L93 Difference]: Finished difference Result 4376 states and 18204 transitions. [2021-06-05 05:22:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:22:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:23,936 INFO L225 Difference]: With dead ends: 4376 [2021-06-05 05:22:23,936 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 05:22:23,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 627.0ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 05:22:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3897. [2021-06-05 05:22:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.196098562628337) internal successors, (16348), 3896 states have internal predecessors, (16348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16348 transitions. [2021-06-05 05:22:23,993 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16348 transitions. Word has length 23 [2021-06-05 05:22:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:23,993 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16348 transitions. [2021-06-05 05:22:23,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16348 transitions. [2021-06-05 05:22:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:23,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:23,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:24,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-06-05 05:22:24,200 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1629059839, now seen corresponding path program 396 times [2021-06-05 05:22:24,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:24,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328512640] [2021-06-05 05:22:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:24,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:24,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328512640] [2021-06-05 05:22:24,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328512640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:24,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330281651] [2021-06-05 05:22:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:24,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:24,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:24,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:24,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:24,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:24,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:24,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:24,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330281651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:24,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:24,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:24,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576115883] [2021-06-05 05:22:24,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:24,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:24,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:24,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:24,527 INFO L87 Difference]: Start difference. First operand 3897 states and 16348 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:25,373 INFO L93 Difference]: Finished difference Result 4345 states and 18092 transitions. [2021-06-05 05:22:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:25,382 INFO L225 Difference]: With dead ends: 4345 [2021-06-05 05:22:25,382 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 05:22:25,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:22:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 05:22:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3889. [2021-06-05 05:22:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.195987654320987) internal successors, (16314), 3888 states have internal predecessors, (16314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 16314 transitions. [2021-06-05 05:22:25,437 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 16314 transitions. Word has length 23 [2021-06-05 05:22:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:25,437 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 16314 transitions. [2021-06-05 05:22:25,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 16314 transitions. [2021-06-05 05:22:25,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:25,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:25,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:25,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-05 05:22:25,644 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1799874771, now seen corresponding path program 397 times [2021-06-05 05:22:25,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:25,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511217024] [2021-06-05 05:22:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:25,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:25,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511217024] [2021-06-05 05:22:25,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511217024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:25,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512516131] [2021-06-05 05:22:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:25,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:25,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:25,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:25,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:25,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:25,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512516131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:25,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:25,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:25,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841547582] [2021-06-05 05:22:25,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:25,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:25,966 INFO L87 Difference]: Start difference. First operand 3889 states and 16314 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:26,440 INFO L93 Difference]: Finished difference Result 4301 states and 17926 transitions. [2021-06-05 05:22:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:22:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:26,450 INFO L225 Difference]: With dead ends: 4301 [2021-06-05 05:22:26,450 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 05:22:26,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 05:22:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3883. [2021-06-05 05:22:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3882 states have (on average 4.196805770221535) internal successors, (16292), 3882 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 16292 transitions. [2021-06-05 05:22:26,513 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 16292 transitions. Word has length 23 [2021-06-05 05:22:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:26,513 INFO L482 AbstractCegarLoop]: Abstraction has 3883 states and 16292 transitions. [2021-06-05 05:22:26,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 16292 transitions. [2021-06-05 05:22:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:26,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:26,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:26,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-06-05 05:22:26,720 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 879475445, now seen corresponding path program 1 times [2021-06-05 05:22:26,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:26,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921122687] [2021-06-05 05:22:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:26,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921122687] [2021-06-05 05:22:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921122687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013025770] [2021-06-05 05:22:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:27,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:27,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:27,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:27,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:27,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013025770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:27,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:27,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:27,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594448160] [2021-06-05 05:22:27,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:27,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:27,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:27,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:27,100 INFO L87 Difference]: Start difference. First operand 3883 states and 16292 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:28,277 INFO L93 Difference]: Finished difference Result 4622 states and 19202 transitions. [2021-06-05 05:22:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:28,287 INFO L225 Difference]: With dead ends: 4622 [2021-06-05 05:22:28,288 INFO L226 Difference]: Without dead ends: 4600 [2021-06-05 05:22:28,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-06-05 05:22:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3903. [2021-06-05 05:22:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.199384930804715) internal successors, (16386), 3902 states have internal predecessors, (16386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16386 transitions. [2021-06-05 05:22:28,350 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16386 transitions. Word has length 23 [2021-06-05 05:22:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:28,351 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16386 transitions. [2021-06-05 05:22:28,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16386 transitions. [2021-06-05 05:22:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:28,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:28,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:28,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:28,557 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1464809397, now seen corresponding path program 2 times [2021-06-05 05:22:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:28,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628316656] [2021-06-05 05:22:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:28,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:28,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628316656] [2021-06-05 05:22:28,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628316656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:28,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969504400] [2021-06-05 05:22:28,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:28,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:28,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:28,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:28,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:28,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:28,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:28,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:28,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969504400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:28,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:28,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:28,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715989581] [2021-06-05 05:22:28,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:28,915 INFO L87 Difference]: Start difference. First operand 3903 states and 16386 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:29,853 INFO L93 Difference]: Finished difference Result 4476 states and 18602 transitions. [2021-06-05 05:22:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:22:29,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:29,862 INFO L225 Difference]: With dead ends: 4476 [2021-06-05 05:22:29,862 INFO L226 Difference]: Without dead ends: 4450 [2021-06-05 05:22:29,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 855.7ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:22:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-06-05 05:22:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3907. [2021-06-05 05:22:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.199180747567844) internal successors, (16402), 3906 states have internal predecessors, (16402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16402 transitions. [2021-06-05 05:22:29,918 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16402 transitions. Word has length 23 [2021-06-05 05:22:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:29,918 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16402 transitions. [2021-06-05 05:22:29,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16402 transitions. [2021-06-05 05:22:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:29,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:29,955 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:30,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:30,156 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1216591165, now seen corresponding path program 3 times [2021-06-05 05:22:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:30,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314005221] [2021-06-05 05:22:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:30,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314005221] [2021-06-05 05:22:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314005221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625483995] [2021-06-05 05:22:30,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:30,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:30,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:30,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:30,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:30,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:30,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:30,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625483995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:30,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:30,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:30,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699948822] [2021-06-05 05:22:30,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:30,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:30,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:30,516 INFO L87 Difference]: Start difference. First operand 3907 states and 16402 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:31,126 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-05 05:22:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:31,712 INFO L93 Difference]: Finished difference Result 4476 states and 18602 transitions. [2021-06-05 05:22:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:22:31,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:31,721 INFO L225 Difference]: With dead ends: 4476 [2021-06-05 05:22:31,721 INFO L226 Difference]: Without dead ends: 4455 [2021-06-05 05:22:31,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:22:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2021-06-05 05:22:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 3899. [2021-06-05 05:22:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.199076449461262) internal successors, (16368), 3898 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16368 transitions. [2021-06-05 05:22:31,780 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16368 transitions. Word has length 23 [2021-06-05 05:22:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:31,780 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16368 transitions. [2021-06-05 05:22:31,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16368 transitions. [2021-06-05 05:22:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:31,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:31,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:31,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 05:22:31,987 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1228972823, now seen corresponding path program 4 times [2021-06-05 05:22:31,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:31,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803451488] [2021-06-05 05:22:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:32,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:32,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803451488] [2021-06-05 05:22:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803451488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:32,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574446218] [2021-06-05 05:22:32,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:32,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:32,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:32,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:32,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:32,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:32,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:32,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:32,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574446218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:32,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:32,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:32,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721940808] [2021-06-05 05:22:32,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:32,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:32,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:32,335 INFO L87 Difference]: Start difference. First operand 3899 states and 16368 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:33,126 INFO L93 Difference]: Finished difference Result 4638 states and 19236 transitions. [2021-06-05 05:22:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:33,135 INFO L225 Difference]: With dead ends: 4638 [2021-06-05 05:22:33,135 INFO L226 Difference]: Without dead ends: 4608 [2021-06-05 05:22:33,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2021-06-05 05:22:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 3905. [2021-06-05 05:22:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.200819672131147) internal successors, (16400), 3904 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16400 transitions. [2021-06-05 05:22:33,224 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16400 transitions. Word has length 23 [2021-06-05 05:22:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:33,224 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16400 transitions. [2021-06-05 05:22:33,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16400 transitions. [2021-06-05 05:22:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:33,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:33,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:33,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-05 05:22:33,430 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1310371879, now seen corresponding path program 5 times [2021-06-05 05:22:33,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:33,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571777678] [2021-06-05 05:22:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:33,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571777678] [2021-06-05 05:22:33,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571777678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947450438] [2021-06-05 05:22:33,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:33,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:33,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:33,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:33,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:33,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:33,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:33,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:33,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:33,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947450438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:33,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:33,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673718273] [2021-06-05 05:22:33,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:33,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:33,795 INFO L87 Difference]: Start difference. First operand 3905 states and 16400 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:34,844 INFO L93 Difference]: Finished difference Result 4456 states and 18531 transitions. [2021-06-05 05:22:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:22:34,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:34,853 INFO L225 Difference]: With dead ends: 4456 [2021-06-05 05:22:34,853 INFO L226 Difference]: Without dead ends: 4430 [2021-06-05 05:22:34,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:22:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-06-05 05:22:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3909. [2021-06-05 05:22:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.200614124872057) internal successors, (16416), 3908 states have internal predecessors, (16416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16416 transitions. [2021-06-05 05:22:34,908 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16416 transitions. Word has length 23 [2021-06-05 05:22:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:34,908 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16416 transitions. [2021-06-05 05:22:34,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16416 transitions. [2021-06-05 05:22:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:34,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:34,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:35,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:35,114 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:35,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1371028683, now seen corresponding path program 6 times [2021-06-05 05:22:35,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:35,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288234232] [2021-06-05 05:22:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:35,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288234232] [2021-06-05 05:22:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288234232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:35,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426774960] [2021-06-05 05:22:35,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:35,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:35,407 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:22:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 05:22:35,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:35,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:35,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:35,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 05:22:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:35,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426774960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:35,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:35,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:22:35,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308174517] [2021-06-05 05:22:35,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:22:35,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:22:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:22:35,505 INFO L87 Difference]: Start difference. First operand 3909 states and 16416 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:36,407 INFO L93 Difference]: Finished difference Result 4268 states and 17776 transitions. [2021-06-05 05:22:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:36,416 INFO L225 Difference]: With dead ends: 4268 [2021-06-05 05:22:36,416 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 05:22:36,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 755.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:22:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 05:22:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3901. [2021-06-05 05:22:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.201794871794871) internal successors, (16387), 3900 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16387 transitions. [2021-06-05 05:22:36,498 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16387 transitions. Word has length 23 [2021-06-05 05:22:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:36,499 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16387 transitions. [2021-06-05 05:22:36,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16387 transitions. [2021-06-05 05:22:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:36,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:36,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:36,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:36,705 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1004425269, now seen corresponding path program 7 times [2021-06-05 05:22:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168097853] [2021-06-05 05:22:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:36,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168097853] [2021-06-05 05:22:36,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168097853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051920837] [2021-06-05 05:22:36,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:36,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:36,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:36,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:36,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:36,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:36,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:37,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051920837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:37,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:37,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:37,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108718831] [2021-06-05 05:22:37,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:37,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:37,055 INFO L87 Difference]: Start difference. First operand 3901 states and 16387 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:37,714 INFO L93 Difference]: Finished difference Result 4386 states and 18262 transitions. [2021-06-05 05:22:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:22:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:37,723 INFO L225 Difference]: With dead ends: 4386 [2021-06-05 05:22:37,723 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 05:22:37,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:22:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 05:22:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3912. [2021-06-05 05:22:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.2019943748401944) internal successors, (16434), 3911 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16434 transitions. [2021-06-05 05:22:37,779 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16434 transitions. Word has length 23 [2021-06-05 05:22:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:37,779 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16434 transitions. [2021-06-05 05:22:37,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16434 transitions. [2021-06-05 05:22:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:37,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:37,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:37,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-05 05:22:37,985 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1158862787, now seen corresponding path program 8 times [2021-06-05 05:22:37,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:37,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252549216] [2021-06-05 05:22:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:38,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:38,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252549216] [2021-06-05 05:22:38,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252549216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:38,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155203948] [2021-06-05 05:22:38,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:38,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:38,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:38,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:38,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:38,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:38,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:38,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:38,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:38,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155203948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:38,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:38,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249628453] [2021-06-05 05:22:38,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:38,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:38,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:38,336 INFO L87 Difference]: Start difference. First operand 3912 states and 16434 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:39,117 INFO L93 Difference]: Finished difference Result 4464 states and 18562 transitions. [2021-06-05 05:22:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:22:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:39,126 INFO L225 Difference]: With dead ends: 4464 [2021-06-05 05:22:39,126 INFO L226 Difference]: Without dead ends: 4434 [2021-06-05 05:22:39,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:22:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-06-05 05:22:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 3916. [2021-06-05 05:22:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.202298850574713) internal successors, (16452), 3915 states have internal predecessors, (16452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16452 transitions. [2021-06-05 05:22:39,183 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16452 transitions. Word has length 23 [2021-06-05 05:22:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:39,183 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16452 transitions. [2021-06-05 05:22:39,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16452 transitions. [2021-06-05 05:22:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:39,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:39,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:39,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1222 [2021-06-05 05:22:39,389 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1240261843, now seen corresponding path program 9 times [2021-06-05 05:22:39,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:39,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96414031] [2021-06-05 05:22:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:39,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:39,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96414031] [2021-06-05 05:22:39,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96414031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:39,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721880568] [2021-06-05 05:22:39,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:39,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:39,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:39,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:39,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:39,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:39,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:39,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:39,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721880568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:39,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:39,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157440246] [2021-06-05 05:22:39,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:39,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:39,782 INFO L87 Difference]: Start difference. First operand 3916 states and 16452 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:40,590 INFO L93 Difference]: Finished difference Result 4328 states and 18029 transitions. [2021-06-05 05:22:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:40,599 INFO L225 Difference]: With dead ends: 4328 [2021-06-05 05:22:40,600 INFO L226 Difference]: Without dead ends: 4302 [2021-06-05 05:22:40,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:22:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-06-05 05:22:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3920. [2021-06-05 05:22:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.20209237050268) internal successors, (16468), 3919 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16468 transitions. [2021-06-05 05:22:40,660 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16468 transitions. Word has length 23 [2021-06-05 05:22:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:40,661 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16468 transitions. [2021-06-05 05:22:40,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16468 transitions. [2021-06-05 05:22:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:40,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:40,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:40,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1224,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:40,868 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1441138719, now seen corresponding path program 10 times [2021-06-05 05:22:40,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:40,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648977402] [2021-06-05 05:22:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:41,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648977402] [2021-06-05 05:22:41,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648977402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761723979] [2021-06-05 05:22:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:41,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:41,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:41,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:41,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:41,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:41,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:41,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:41,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:41,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761723979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:41,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:41,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788756996] [2021-06-05 05:22:41,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:41,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:41,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:41,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:41,227 INFO L87 Difference]: Start difference. First operand 3920 states and 16468 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:42,271 INFO L93 Difference]: Finished difference Result 4339 states and 18070 transitions. [2021-06-05 05:22:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:42,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:42,281 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 05:22:42,281 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 05:22:42,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:22:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 05:22:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3910. [2021-06-05 05:22:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.202609363008442) internal successors, (16428), 3909 states have internal predecessors, (16428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16428 transitions. [2021-06-05 05:22:42,344 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16428 transitions. Word has length 23 [2021-06-05 05:22:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:42,344 INFO L482 AbstractCegarLoop]: Abstraction has 3910 states and 16428 transitions. [2021-06-05 05:22:42,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16428 transitions. [2021-06-05 05:22:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:42,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:42,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:42,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 05:22:42,551 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1998744343, now seen corresponding path program 11 times [2021-06-05 05:22:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:42,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851144730] [2021-06-05 05:22:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:42,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:42,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851144730] [2021-06-05 05:22:42,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851144730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:42,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431186331] [2021-06-05 05:22:42,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:42,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:22:42,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:42,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:42,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:42,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:42,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:42,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:42,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:42,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:42,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431186331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:42,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:42,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:42,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880337842] [2021-06-05 05:22:42,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:42,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:42,936 INFO L87 Difference]: Start difference. First operand 3910 states and 16428 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:43,562 INFO L93 Difference]: Finished difference Result 4321 states and 18000 transitions. [2021-06-05 05:22:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:22:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:43,571 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 05:22:43,571 INFO L226 Difference]: Without dead ends: 4312 [2021-06-05 05:22:43,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:22:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-05 05:22:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3941. [2021-06-05 05:22:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 4.20761421319797) internal successors, (16578), 3940 states have internal predecessors, (16578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 16578 transitions. [2021-06-05 05:22:43,631 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 16578 transitions. Word has length 23 [2021-06-05 05:22:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:43,631 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 16578 transitions. [2021-06-05 05:22:43,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 16578 transitions. [2021-06-05 05:22:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:43,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:43,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:43,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:43,837 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1381141465, now seen corresponding path program 12 times [2021-06-05 05:22:43,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:43,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464366564] [2021-06-05 05:22:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:43,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:43,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464366564] [2021-06-05 05:22:43,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464366564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:43,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871415102] [2021-06-05 05:22:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:43,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:22:43,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:22:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:44,148 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 05:22:44,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 05:22:44,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:44,236 INFO L628 ElimStorePlain]: treesize reduction 61, result has 55.5 percent of original size [2021-06-05 05:22:44,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:44,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:76 [2021-06-05 05:22:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:44,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871415102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:44,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:44,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:22:44,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423234146] [2021-06-05 05:22:44,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:22:44,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:22:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:22:44,364 INFO L87 Difference]: Start difference. First operand 3941 states and 16578 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:44,638 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 05:22:44,815 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 05:22:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:45,567 INFO L93 Difference]: Finished difference Result 4315 states and 18017 transitions. [2021-06-05 05:22:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:22:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:45,575 INFO L225 Difference]: With dead ends: 4315 [2021-06-05 05:22:45,576 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 05:22:45,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 976.8ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:22:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 05:22:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3945. [2021-06-05 05:22:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.2074036511156185) internal successors, (16594), 3944 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16594 transitions. [2021-06-05 05:22:45,631 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16594 transitions. Word has length 23 [2021-06-05 05:22:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:45,632 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16594 transitions. [2021-06-05 05:22:45,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16594 transitions. [2021-06-05 05:22:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:45,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:45,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:45,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:45,838 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1226703947, now seen corresponding path program 13 times [2021-06-05 05:22:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:45,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365763505] [2021-06-05 05:22:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:45,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365763505] [2021-06-05 05:22:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365763505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:45,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185343115] [2021-06-05 05:22:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:45,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:46,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:46,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:46,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:46,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:46,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185343115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:46,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:46,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:46,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798834668] [2021-06-05 05:22:46,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:46,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:46,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:46,207 INFO L87 Difference]: Start difference. First operand 3945 states and 16594 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:47,001 INFO L93 Difference]: Finished difference Result 4385 states and 18284 transitions. [2021-06-05 05:22:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:22:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:47,011 INFO L225 Difference]: With dead ends: 4385 [2021-06-05 05:22:47,011 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 05:22:47,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 05:22:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3968. [2021-06-05 05:22:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.206705318880767) internal successors, (16688), 3967 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16688 transitions. [2021-06-05 05:22:47,075 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16688 transitions. Word has length 23 [2021-06-05 05:22:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:47,076 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 16688 transitions. [2021-06-05 05:22:47,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16688 transitions. [2021-06-05 05:22:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:47,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:47,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:47,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1235,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:47,283 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1145304891, now seen corresponding path program 14 times [2021-06-05 05:22:47,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:47,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275770406] [2021-06-05 05:22:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:47,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:47,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275770406] [2021-06-05 05:22:47,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275770406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:47,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773008695] [2021-06-05 05:22:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:47,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:47,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:47,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:47,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:47,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:47,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:47,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:47,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:47,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:47,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773008695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:47,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:47,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:47,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014975933] [2021-06-05 05:22:47,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:47,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:47,663 INFO L87 Difference]: Start difference. First operand 3968 states and 16688 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:48,649 INFO L93 Difference]: Finished difference Result 4260 states and 17798 transitions. [2021-06-05 05:22:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:48,658 INFO L225 Difference]: With dead ends: 4260 [2021-06-05 05:22:48,658 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 05:22:48,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 877.1ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:22:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 05:22:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3972. [2021-06-05 05:22:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 4.206497104004029) internal successors, (16704), 3971 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 16704 transitions. [2021-06-05 05:22:48,715 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 16704 transitions. Word has length 23 [2021-06-05 05:22:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:48,715 INFO L482 AbstractCegarLoop]: Abstraction has 3972 states and 16704 transitions. [2021-06-05 05:22:48,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 16704 transitions. [2021-06-05 05:22:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:48,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:48,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 05:22:48,921 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash 468261843, now seen corresponding path program 15 times [2021-06-05 05:22:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:48,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524804036] [2021-06-05 05:22:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:49,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524804036] [2021-06-05 05:22:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524804036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027213201] [2021-06-05 05:22:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:49,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:22:49,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:49,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:49,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:49,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:49,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:49,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:49,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:49,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027213201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:49,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:49,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:22:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547108612] [2021-06-05 05:22:49,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:49,313 INFO L87 Difference]: Start difference. First operand 3972 states and 16704 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:50,463 INFO L93 Difference]: Finished difference Result 4233 states and 17674 transitions. [2021-06-05 05:22:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:22:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:50,472 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 05:22:50,473 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 05:22:50,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 996.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 05:22:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3968. [2021-06-05 05:22:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.206705318880767) internal successors, (16688), 3967 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16688 transitions. [2021-06-05 05:22:50,533 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16688 transitions. Word has length 23 [2021-06-05 05:22:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:50,533 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 16688 transitions. [2021-06-05 05:22:50,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16688 transitions. [2021-06-05 05:22:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:50,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:50,539 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:50,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:50,739 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash 570192243, now seen corresponding path program 1 times [2021-06-05 05:22:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:50,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291023937] [2021-06-05 05:22:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:50,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:50,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291023937] [2021-06-05 05:22:50,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291023937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:50,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286033677] [2021-06-05 05:22:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:50,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:50,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:50,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:50,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:50,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:51,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286033677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:51,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:51,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:22:51,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573276623] [2021-06-05 05:22:51,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:51,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:51,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:51,061 INFO L87 Difference]: Start difference. First operand 3968 states and 16688 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:51,936 INFO L93 Difference]: Finished difference Result 5405 states and 22414 transitions. [2021-06-05 05:22:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:51,947 INFO L225 Difference]: With dead ends: 5405 [2021-06-05 05:22:51,947 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 05:22:51,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 596.7ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:22:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 05:22:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4028. [2021-06-05 05:22:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 4.215545070772287) internal successors, (16976), 4027 states have internal predecessors, (16976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 16976 transitions. [2021-06-05 05:22:52,011 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 16976 transitions. Word has length 23 [2021-06-05 05:22:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:52,012 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 16976 transitions. [2021-06-05 05:22:52,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 16976 transitions. [2021-06-05 05:22:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:52,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:52,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:52,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:52,218 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1155526195, now seen corresponding path program 2 times [2021-06-05 05:22:52,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:52,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173093619] [2021-06-05 05:22:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:22:52,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:52,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173093619] [2021-06-05 05:22:52,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173093619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:52,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062640371] [2021-06-05 05:22:52,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:52,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:52,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:52,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:52,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:52,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:52,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:52,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062640371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:52,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:52,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:22:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169886581] [2021-06-05 05:22:52,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:52,598 INFO L87 Difference]: Start difference. First operand 4028 states and 16976 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:53,595 INFO L93 Difference]: Finished difference Result 5250 states and 21765 transitions. [2021-06-05 05:22:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:22:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:53,606 INFO L225 Difference]: With dead ends: 5250 [2021-06-05 05:22:53,606 INFO L226 Difference]: Without dead ends: 5198 [2021-06-05 05:22:53,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:22:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-06-05 05:22:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4094. [2021-06-05 05:22:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.219643293427803) internal successors, (17271), 4093 states have internal predecessors, (17271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 17271 transitions. [2021-06-05 05:22:53,676 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 17271 transitions. Word has length 23 [2021-06-05 05:22:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:53,676 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 17271 transitions. [2021-06-05 05:22:53,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 17271 transitions. [2021-06-05 05:22:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:53,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:53,683 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:53,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 05:22:53,883 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:53,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:53,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1525874367, now seen corresponding path program 3 times [2021-06-05 05:22:53,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:53,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141229224] [2021-06-05 05:22:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:22:53,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:53,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141229224] [2021-06-05 05:22:53,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141229224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:53,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346163004] [2021-06-05 05:22:53,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:54,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:22:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:54,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:54,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:54,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:54,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:54,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:54,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:54,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346163004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:54,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:54,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:22:54,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368800172] [2021-06-05 05:22:54,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:54,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:54,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:54,230 INFO L87 Difference]: Start difference. First operand 4094 states and 17271 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:55,049 INFO L93 Difference]: Finished difference Result 5166 states and 21474 transitions. [2021-06-05 05:22:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:55,059 INFO L225 Difference]: With dead ends: 5166 [2021-06-05 05:22:55,059 INFO L226 Difference]: Without dead ends: 5124 [2021-06-05 05:22:55,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-06-05 05:22:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 4146. [2021-06-05 05:22:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 4145 states have (on average 4.222677925211098) internal successors, (17503), 4145 states have internal predecessors, (17503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 17503 transitions. [2021-06-05 05:22:55,124 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 17503 transitions. Word has length 23 [2021-06-05 05:22:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:55,124 INFO L482 AbstractCegarLoop]: Abstraction has 4146 states and 17503 transitions. [2021-06-05 05:22:55,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 17503 transitions. [2021-06-05 05:22:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:55,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:55,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:55,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 05:22:55,331 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 919689621, now seen corresponding path program 4 times [2021-06-05 05:22:55,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:55,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118537871] [2021-06-05 05:22:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:22:55,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:55,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118537871] [2021-06-05 05:22:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118537871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:55,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222163071] [2021-06-05 05:22:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:55,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:55,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:55,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:55,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:22:55,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:55,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:55,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:55,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:22:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:55,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222163071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:55,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:55,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:22:55,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333023964] [2021-06-05 05:22:55,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:55,687 INFO L87 Difference]: Start difference. First operand 4146 states and 17503 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:56,600 INFO L93 Difference]: Finished difference Result 5533 states and 22929 transitions. [2021-06-05 05:22:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:56,613 INFO L225 Difference]: With dead ends: 5533 [2021-06-05 05:22:56,613 INFO L226 Difference]: Without dead ends: 5472 [2021-06-05 05:22:56,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:22:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-05 05:22:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 4158. [2021-06-05 05:22:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.223237911955738) internal successors, (17556), 4157 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17556 transitions. [2021-06-05 05:22:56,688 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17556 transitions. Word has length 23 [2021-06-05 05:22:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:56,688 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17556 transitions. [2021-06-05 05:22:56,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17556 transitions. [2021-06-05 05:22:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:56,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:56,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:56,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-06-05 05:22:56,895 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:56,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1001088677, now seen corresponding path program 5 times [2021-06-05 05:22:56,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:56,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808952940] [2021-06-05 05:22:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:22:57,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:57,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808952940] [2021-06-05 05:22:57,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808952940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:57,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124928382] [2021-06-05 05:22:57,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:57,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:57,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:57,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:57,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:57,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:57,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:57,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:57,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 05:22:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124928382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:57,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:22:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673556291] [2021-06-05 05:22:57,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:57,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:57,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:57,214 INFO L87 Difference]: Start difference. First operand 4158 states and 17556 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:58,096 INFO L93 Difference]: Finished difference Result 4985 states and 20747 transitions. [2021-06-05 05:22:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:58,106 INFO L225 Difference]: With dead ends: 4985 [2021-06-05 05:22:58,106 INFO L226 Difference]: Without dead ends: 4933 [2021-06-05 05:22:58,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-05 05:22:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4160. [2021-06-05 05:22:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4160 states, 4159 states have (on average 4.224092329886992) internal successors, (17568), 4159 states have internal predecessors, (17568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4160 states to 4160 states and 17568 transitions. [2021-06-05 05:22:58,171 INFO L78 Accepts]: Start accepts. Automaton has 4160 states and 17568 transitions. Word has length 23 [2021-06-05 05:22:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:58,171 INFO L482 AbstractCegarLoop]: Abstraction has 4160 states and 17568 transitions. [2021-06-05 05:22:58,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4160 states and 17568 transitions. [2021-06-05 05:22:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:58,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:58,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:58,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-05 05:22:58,378 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:58,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1680311885, now seen corresponding path program 6 times [2021-06-05 05:22:58,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:58,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638968786] [2021-06-05 05:22:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:22:58,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:58,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638968786] [2021-06-05 05:22:58,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638968786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:58,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125488421] [2021-06-05 05:22:58,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:58,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:58,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:58,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:58,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:58,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:58,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:58,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:58,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:22:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:58,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125488421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:58,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:58,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:22:58,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898046111] [2021-06-05 05:22:58,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:58,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:58,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:58,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:58,724 INFO L87 Difference]: Start difference. First operand 4160 states and 17568 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,850 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 05:22:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:59,519 INFO L93 Difference]: Finished difference Result 5108 states and 21253 transitions. [2021-06-05 05:22:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:22:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:59,529 INFO L225 Difference]: With dead ends: 5108 [2021-06-05 05:22:59,529 INFO L226 Difference]: Without dead ends: 5066 [2021-06-05 05:22:59,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:22:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-06-05 05:22:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4164. [2021-06-05 05:22:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 4163 states have (on average 4.223877011770358) internal successors, (17584), 4163 states have internal predecessors, (17584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 17584 transitions. [2021-06-05 05:22:59,593 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 17584 transitions. Word has length 23 [2021-06-05 05:22:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:59,593 INFO L482 AbstractCegarLoop]: Abstraction has 4164 states and 17584 transitions. [2021-06-05 05:22:59,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 17584 transitions. [2021-06-05 05:22:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:22:59,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:59,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:59,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:59,800 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash 413446001, now seen corresponding path program 1 times [2021-06-05 05:22:59,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:59,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458601147] [2021-06-05 05:22:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:59,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458601147] [2021-06-05 05:22:59,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458601147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116300472] [2021-06-05 05:22:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:22:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:00,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:00,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:00,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:00,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:00,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:00,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116300472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:00,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:00,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:23:00,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348658654] [2021-06-05 05:23:00,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:00,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:00,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:00,143 INFO L87 Difference]: Start difference. First operand 4164 states and 17584 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:00,969 INFO L93 Difference]: Finished difference Result 5900 states and 24455 transitions. [2021-06-05 05:23:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:23:00,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:00,981 INFO L225 Difference]: With dead ends: 5900 [2021-06-05 05:23:00,981 INFO L226 Difference]: Without dead ends: 5852 [2021-06-05 05:23:00,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:23:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-05 05:23:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4252. [2021-06-05 05:23:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 4251 states have (on average 4.235474006116208) internal successors, (18005), 4251 states have internal predecessors, (18005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 18005 transitions. [2021-06-05 05:23:01,048 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 18005 transitions. Word has length 23 [2021-06-05 05:23:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:01,048 INFO L482 AbstractCegarLoop]: Abstraction has 4252 states and 18005 transitions. [2021-06-05 05:23:01,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 18005 transitions. [2021-06-05 05:23:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:01,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:01,054 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:01,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:01,255 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:01,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:01,255 INFO L82 PathProgramCache]: Analyzing trace with hash 926972853, now seen corresponding path program 2 times [2021-06-05 05:23:01,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:01,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516434315] [2021-06-05 05:23:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:01,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516434315] [2021-06-05 05:23:01,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516434315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868527518] [2021-06-05 05:23:01,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:01,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:01,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:01,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:01,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:01,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:01,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:01,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868527518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:01,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:01,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:23:01,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749695957] [2021-06-05 05:23:01,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:01,599 INFO L87 Difference]: Start difference. First operand 4252 states and 18005 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:02,388 INFO L93 Difference]: Finished difference Result 5525 states and 23009 transitions. [2021-06-05 05:23:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:23:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:02,399 INFO L225 Difference]: With dead ends: 5525 [2021-06-05 05:23:02,399 INFO L226 Difference]: Without dead ends: 5469 [2021-06-05 05:23:02,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 700.2ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:23:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-06-05 05:23:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4336. [2021-06-05 05:23:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 4.242214532871972) internal successors, (18390), 4335 states have internal predecessors, (18390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 18390 transitions. [2021-06-05 05:23:02,467 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 18390 transitions. Word has length 23 [2021-06-05 05:23:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:02,467 INFO L482 AbstractCegarLoop]: Abstraction has 4336 states and 18390 transitions. [2021-06-05 05:23:02,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 18390 transitions. [2021-06-05 05:23:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:02,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:02,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:02,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 05:23:02,674 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:02,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:02,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2002684009, now seen corresponding path program 3 times [2021-06-05 05:23:02,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:02,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088969576] [2021-06-05 05:23:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:02,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:02,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088969576] [2021-06-05 05:23:02,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088969576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:02,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483893068] [2021-06-05 05:23:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:02,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:02,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:23:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:02,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:02,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:02,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:02,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:02,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:02,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 05:23:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:02,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483893068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:02,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:02,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:23:02,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481244318] [2021-06-05 05:23:02,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:02,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:02,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:02,999 INFO L87 Difference]: Start difference. First operand 4336 states and 18390 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:03,827 INFO L93 Difference]: Finished difference Result 5447 states and 22729 transitions. [2021-06-05 05:23:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:23:03,827 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:03,838 INFO L225 Difference]: With dead ends: 5447 [2021-06-05 05:23:03,838 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 05:23:03,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:23:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 05:23:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4412. [2021-06-05 05:23:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 4.2443890274314215) internal successors, (18722), 4411 states have internal predecessors, (18722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 18722 transitions. [2021-06-05 05:23:03,905 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 18722 transitions. Word has length 23 [2021-06-05 05:23:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:03,905 INFO L482 AbstractCegarLoop]: Abstraction has 4412 states and 18722 transitions. [2021-06-05 05:23:03,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 18722 transitions. [2021-06-05 05:23:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:03,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:03,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:04,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 05:23:04,112 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash 822953499, now seen corresponding path program 4 times [2021-06-05 05:23:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749166883] [2021-06-05 05:23:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:04,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:04,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749166883] [2021-06-05 05:23:04,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749166883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:04,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272424849] [2021-06-05 05:23:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:04,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:04,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:04,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:04,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:04,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:04,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:04,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:04,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:04,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:04,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272424849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:04,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:04,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:23:04,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720668794] [2021-06-05 05:23:04,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:04,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:04,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:04,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:04,440 INFO L87 Difference]: Start difference. First operand 4412 states and 18722 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:05,304 INFO L93 Difference]: Finished difference Result 5663 states and 23581 transitions. [2021-06-05 05:23:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:23:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:05,316 INFO L225 Difference]: With dead ends: 5663 [2021-06-05 05:23:05,316 INFO L226 Difference]: Without dead ends: 5597 [2021-06-05 05:23:05,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:23:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-06-05 05:23:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 4457. [2021-06-05 05:23:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 4.248204667863555) internal successors, (18930), 4456 states have internal predecessors, (18930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 18930 transitions. [2021-06-05 05:23:05,390 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 18930 transitions. Word has length 23 [2021-06-05 05:23:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:05,390 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 18930 transitions. [2021-06-05 05:23:05,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 18930 transitions. [2021-06-05 05:23:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:05,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:05,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:05,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 05:23:05,597 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1410698821, now seen corresponding path program 5 times [2021-06-05 05:23:05,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:05,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151272615] [2021-06-05 05:23:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:05,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:05,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151272615] [2021-06-05 05:23:05,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151272615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:05,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472560678] [2021-06-05 05:23:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:05,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:23:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:05,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:23:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:05,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:05,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 05:23:05,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:05,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:05,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:05,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 05:23:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:05,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472560678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:05,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:05,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:23:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348620605] [2021-06-05 05:23:05,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:23:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:23:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:23:05,909 INFO L87 Difference]: Start difference. First operand 4457 states and 18930 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:06,678 INFO L93 Difference]: Finished difference Result 5357 states and 22443 transitions. [2021-06-05 05:23:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:23:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:06,690 INFO L225 Difference]: With dead ends: 5357 [2021-06-05 05:23:06,691 INFO L226 Difference]: Without dead ends: 5329 [2021-06-05 05:23:06,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:23:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-05 05:23:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4501. [2021-06-05 05:23:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 4.2508888888888885) internal successors, (19129), 4500 states have internal predecessors, (19129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 19129 transitions. [2021-06-05 05:23:06,763 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 19129 transitions. Word has length 23 [2021-06-05 05:23:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:06,764 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 19129 transitions. [2021-06-05 05:23:06,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 19129 transitions. [2021-06-05 05:23:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:06,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:06,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:06,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1259 [2021-06-05 05:23:06,971 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:06,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1808557319, now seen corresponding path program 6 times [2021-06-05 05:23:06,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:06,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478668839] [2021-06-05 05:23:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:23:07,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478668839] [2021-06-05 05:23:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478668839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942584138] [2021-06-05 05:23:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:07,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:07,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:07,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:07,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:07,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:07,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:07,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:07,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:07,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:07,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942584138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:07,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:07,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 05:23:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498596994] [2021-06-05 05:23:07,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:07,317 INFO L87 Difference]: Start difference. First operand 4501 states and 19129 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:08,251 INFO L93 Difference]: Finished difference Result 5494 states and 22980 transitions. [2021-06-05 05:23:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:23:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:08,262 INFO L225 Difference]: With dead ends: 5494 [2021-06-05 05:23:08,262 INFO L226 Difference]: Without dead ends: 5448 [2021-06-05 05:23:08,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:23:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-06-05 05:23:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4547. [2021-06-05 05:23:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 4.251869775626925) internal successors, (19329), 4546 states have internal predecessors, (19329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 19329 transitions. [2021-06-05 05:23:08,361 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 19329 transitions. Word has length 23 [2021-06-05 05:23:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:08,361 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 19329 transitions. [2021-06-05 05:23:08,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 19329 transitions. [2021-06-05 05:23:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:08,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:08,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:08,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:08,569 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash 601928087, now seen corresponding path program 7 times [2021-06-05 05:23:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:08,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877985562] [2021-06-05 05:23:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:08,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877985562] [2021-06-05 05:23:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877985562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006051459] [2021-06-05 05:23:08,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:08,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:08,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:08,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:08,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:08,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:08,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:08,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006051459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:08,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:08,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:08,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415605040] [2021-06-05 05:23:08,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:08,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:08,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:08,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:08,905 INFO L87 Difference]: Start difference. First operand 4547 states and 19329 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:09,965 INFO L93 Difference]: Finished difference Result 5474 states and 22929 transitions. [2021-06-05 05:23:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:23:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:09,976 INFO L225 Difference]: With dead ends: 5474 [2021-06-05 05:23:09,976 INFO L226 Difference]: Without dead ends: 5440 [2021-06-05 05:23:09,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 909.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:23:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-06-05 05:23:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 4568. [2021-06-05 05:23:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4567 states have (on average 4.253558134442741) internal successors, (19426), 4567 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 19426 transitions. [2021-06-05 05:23:10,048 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 19426 transitions. Word has length 23 [2021-06-05 05:23:10,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:10,048 INFO L482 AbstractCegarLoop]: Abstraction has 4568 states and 19426 transitions. [2021-06-05 05:23:10,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 19426 transitions. [2021-06-05 05:23:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:10,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:10,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:10,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-05 05:23:10,255 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash -726769333, now seen corresponding path program 8 times [2021-06-05 05:23:10,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:10,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554158693] [2021-06-05 05:23:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:10,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554158693] [2021-06-05 05:23:10,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554158693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851375376] [2021-06-05 05:23:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:10,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:10,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:10,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:10,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:10,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:10,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:10,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:10,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:10,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851375376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:10,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:10,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055980987] [2021-06-05 05:23:10,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:10,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:10,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:10,595 INFO L87 Difference]: Start difference. First operand 4568 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:11,643 INFO L93 Difference]: Finished difference Result 5696 states and 23793 transitions. [2021-06-05 05:23:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:23:11,643 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:11,655 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 05:23:11,655 INFO L226 Difference]: Without dead ends: 5634 [2021-06-05 05:23:11,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:23:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-06-05 05:23:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 4568. [2021-06-05 05:23:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4567 states have (on average 4.253558134442741) internal successors, (19426), 4567 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 19426 transitions. [2021-06-05 05:23:11,729 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 19426 transitions. Word has length 23 [2021-06-05 05:23:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:11,729 INFO L482 AbstractCegarLoop]: Abstraction has 4568 states and 19426 transitions. [2021-06-05 05:23:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 19426 transitions. [2021-06-05 05:23:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:11,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:11,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:11,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1266,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:11,937 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash -139024011, now seen corresponding path program 9 times [2021-06-05 05:23:11,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:11,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729325422] [2021-06-05 05:23:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729325422] [2021-06-05 05:23:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729325422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642126256] [2021-06-05 05:23:12,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:12,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:12,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:12,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:12,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:12,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:12,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:12,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642126256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:12,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:12,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048243527] [2021-06-05 05:23:12,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:12,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:12,371 INFO L87 Difference]: Start difference. First operand 4568 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:13,475 INFO L93 Difference]: Finished difference Result 5416 states and 22681 transitions. [2021-06-05 05:23:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:23:13,475 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:13,486 INFO L225 Difference]: With dead ends: 5416 [2021-06-05 05:23:13,486 INFO L226 Difference]: Without dead ends: 5360 [2021-06-05 05:23:13,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 872.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:23:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2021-06-05 05:23:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 4574. [2021-06-05 05:23:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254100153072382) internal successors, (19454), 4573 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19454 transitions. [2021-06-05 05:23:13,555 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19454 transitions. Word has length 23 [2021-06-05 05:23:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:13,555 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19454 transitions. [2021-06-05 05:23:13,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19454 transitions. [2021-06-05 05:23:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:13,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:13,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:13,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1268 [2021-06-05 05:23:13,763 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:13,763 INFO L82 PathProgramCache]: Analyzing trace with hash 936687145, now seen corresponding path program 10 times [2021-06-05 05:23:13,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:13,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235410183] [2021-06-05 05:23:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:13,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235410183] [2021-06-05 05:23:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235410183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116442546] [2021-06-05 05:23:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:13,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:13,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:13,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:14,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:14,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:14,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:14,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:14,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:14,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:14,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116442546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:14,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:14,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:14,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043432148] [2021-06-05 05:23:14,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:14,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:14,133 INFO L87 Difference]: Start difference. First operand 4574 states and 19454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:15,191 INFO L93 Difference]: Finished difference Result 5380 states and 22550 transitions. [2021-06-05 05:23:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:23:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:15,203 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 05:23:15,203 INFO L226 Difference]: Without dead ends: 5334 [2021-06-05 05:23:15,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:23:15,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-05 05:23:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4572. [2021-06-05 05:23:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 4.254648873331875) internal successors, (19448), 4571 states have internal predecessors, (19448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 19448 transitions. [2021-06-05 05:23:15,278 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 19448 transitions. Word has length 23 [2021-06-05 05:23:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:15,278 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 19448 transitions. [2021-06-05 05:23:15,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 19448 transitions. [2021-06-05 05:23:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:15,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:15,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:15,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1270 [2021-06-05 05:23:15,486 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:15,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1544061897, now seen corresponding path program 7 times [2021-06-05 05:23:15,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:15,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496476697] [2021-06-05 05:23:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:15,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496476697] [2021-06-05 05:23:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496476697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024486234] [2021-06-05 05:23:15,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:15,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:15,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:15,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:15,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:15,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:15,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024486234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:15,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250242462] [2021-06-05 05:23:15,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:15,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:15,830 INFO L87 Difference]: Start difference. First operand 4572 states and 19448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:16,984 INFO L93 Difference]: Finished difference Result 5685 states and 23805 transitions. [2021-06-05 05:23:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:23:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:16,996 INFO L225 Difference]: With dead ends: 5685 [2021-06-05 05:23:16,996 INFO L226 Difference]: Without dead ends: 5641 [2021-06-05 05:23:16,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:23:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2021-06-05 05:23:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 4574. [2021-06-05 05:23:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 05:23:17,066 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 05:23:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:17,066 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 05:23:17,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 05:23:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:17,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:17,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:17,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:17,274 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash -958727945, now seen corresponding path program 8 times [2021-06-05 05:23:17,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:17,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953899548] [2021-06-05 05:23:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:17,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:17,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953899548] [2021-06-05 05:23:17,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953899548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:17,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751911163] [2021-06-05 05:23:17,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:17,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:17,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:17,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:17,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:17,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:17,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751911163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:17,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:17,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:17,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105718951] [2021-06-05 05:23:17,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:17,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:17,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:17,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:17,639 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:18,894 INFO L93 Difference]: Finished difference Result 5479 states and 22926 transitions. [2021-06-05 05:23:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:23:18,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:18,906 INFO L225 Difference]: With dead ends: 5479 [2021-06-05 05:23:18,906 INFO L226 Difference]: Without dead ends: 5427 [2021-06-05 05:23:18,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:23:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2021-06-05 05:23:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 4578. [2021-06-05 05:23:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.2549705046974005) internal successors, (19475), 4577 states have internal predecessors, (19475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 19475 transitions. [2021-06-05 05:23:18,977 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 19475 transitions. Word has length 23 [2021-06-05 05:23:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:18,977 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 19475 transitions. [2021-06-05 05:23:18,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 19475 transitions. [2021-06-05 05:23:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:18,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:18,984 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:19,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,585 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:19,185 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 654838789, now seen corresponding path program 9 times [2021-06-05 05:23:19,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:19,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769128945] [2021-06-05 05:23:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:19,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769128945] [2021-06-05 05:23:19,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769128945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373262518] [2021-06-05 05:23:19,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:19,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:23:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:19,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:19,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:19,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:19,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:19,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:19,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:19,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:19,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373262518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:19,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:19,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:19,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986263396] [2021-06-05 05:23:19,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:19,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:19,556 INFO L87 Difference]: Start difference. First operand 4578 states and 19475 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:20,846 INFO L93 Difference]: Finished difference Result 5406 states and 22644 transitions. [2021-06-05 05:23:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:23:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:20,857 INFO L225 Difference]: With dead ends: 5406 [2021-06-05 05:23:20,857 INFO L226 Difference]: Without dead ends: 5364 [2021-06-05 05:23:20,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 965.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:23:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-06-05 05:23:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 4574. [2021-06-05 05:23:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 05:23:20,931 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 05:23:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:20,931 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 05:23:20,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 05:23:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:20,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:20,938 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:21,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-05 05:23:21,138 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:21,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1771283277, now seen corresponding path program 10 times [2021-06-05 05:23:21,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:21,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697856253] [2021-06-05 05:23:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:21,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697856253] [2021-06-05 05:23:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697856253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591851851] [2021-06-05 05:23:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:21,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:21,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:21,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:21,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:21,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:21,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:21,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:21,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591851851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:21,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:21,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:21,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558434613] [2021-06-05 05:23:21,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:21,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:21,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:21,519 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:22,777 INFO L93 Difference]: Finished difference Result 5921 states and 24768 transitions. [2021-06-05 05:23:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:23:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:22,790 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 05:23:22,790 INFO L226 Difference]: Without dead ends: 5877 [2021-06-05 05:23:22,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 928.9ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:23:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-06-05 05:23:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4574. [2021-06-05 05:23:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 05:23:22,869 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 05:23:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:22,869 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 05:23:22,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 05:23:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:22,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:22,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:23,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-06-05 05:23:23,076 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1257756425, now seen corresponding path program 11 times [2021-06-05 05:23:23,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:23,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005190842] [2021-06-05 05:23:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:23,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:23,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005190842] [2021-06-05 05:23:23,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005190842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:23,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964244246] [2021-06-05 05:23:23,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:23,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:23:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:23:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:23,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 05:23:23,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:23,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:23,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:23,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 05:23:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:23,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964244246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:23,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:23,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:23:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109110630] [2021-06-05 05:23:23,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:23:23,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:23:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:23:23,382 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:24,449 INFO L93 Difference]: Finished difference Result 5605 states and 23487 transitions. [2021-06-05 05:23:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:23:24,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:24,462 INFO L225 Difference]: With dead ends: 5605 [2021-06-05 05:23:24,462 INFO L226 Difference]: Without dead ends: 5580 [2021-06-05 05:23:24,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 822.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:23:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-06-05 05:23:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4578. [2021-06-05 05:23:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.2549705046974005) internal successors, (19475), 4577 states have internal predecessors, (19475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 19475 transitions. [2021-06-05 05:23:24,568 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 19475 transitions. Word has length 23 [2021-06-05 05:23:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:24,568 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 19475 transitions. [2021-06-05 05:23:24,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 19475 transitions. [2021-06-05 05:23:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:24,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:24,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:24,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:24,776 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:24,777 INFO L82 PathProgramCache]: Analyzing trace with hash -182045269, now seen corresponding path program 12 times [2021-06-05 05:23:24,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:24,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537555378] [2021-06-05 05:23:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:24,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:24,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537555378] [2021-06-05 05:23:24,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537555378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:24,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123095819] [2021-06-05 05:23:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:24,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:24,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:25,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:25,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:25,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:25,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:25,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 05:23:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123095819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:25,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:25,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53829110] [2021-06-05 05:23:25,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:25,135 INFO L87 Difference]: Start difference. First operand 4578 states and 19475 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:26,194 INFO L93 Difference]: Finished difference Result 5643 states and 23600 transitions. [2021-06-05 05:23:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:23:26,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:26,207 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 05:23:26,207 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 05:23:26,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 889.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:23:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 05:23:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4574. [2021-06-05 05:23:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 05:23:26,285 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 05:23:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:26,285 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 05:23:26,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 05:23:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:26,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:26,293 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:26,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:26,493 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash 98950583, now seen corresponding path program 13 times [2021-06-05 05:23:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189539352] [2021-06-05 05:23:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:26,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:26,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189539352] [2021-06-05 05:23:26,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189539352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:26,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61495196] [2021-06-05 05:23:26,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:26,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:26,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:26,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:26,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:26,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:23:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:26,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61495196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:26,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:26,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:26,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516290368] [2021-06-05 05:23:26,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:26,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:26,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:26,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:26,869 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:27,858 INFO L93 Difference]: Finished difference Result 5111 states and 21521 transitions. [2021-06-05 05:23:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:23:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:27,869 INFO L225 Difference]: With dead ends: 5111 [2021-06-05 05:23:27,869 INFO L226 Difference]: Without dead ends: 5085 [2021-06-05 05:23:27,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:23:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-06-05 05:23:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 4583. [2021-06-05 05:23:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 4.253382802269751) internal successors, (19489), 4582 states have internal predecessors, (19489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 19489 transitions. [2021-06-05 05:23:27,937 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 19489 transitions. Word has length 23 [2021-06-05 05:23:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:27,937 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 19489 transitions. [2021-06-05 05:23:27,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 19489 transitions. [2021-06-05 05:23:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:27,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:27,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:28,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:28,144 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash -942625485, now seen corresponding path program 14 times [2021-06-05 05:23:28,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:28,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745482855] [2021-06-05 05:23:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:28,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745482855] [2021-06-05 05:23:28,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745482855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319714544] [2021-06-05 05:23:28,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:28,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:28,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:28,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:28,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:28,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:28,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:28,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:23:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:28,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319714544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:28,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:28,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:28,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049445712] [2021-06-05 05:23:28,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:28,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:28,510 INFO L87 Difference]: Start difference. First operand 4583 states and 19489 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:29,431 INFO L93 Difference]: Finished difference Result 5109 states and 21511 transitions. [2021-06-05 05:23:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:23:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:29,442 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 05:23:29,442 INFO L226 Difference]: Without dead ends: 5081 [2021-06-05 05:23:29,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 794.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:23:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-06-05 05:23:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4576. [2021-06-05 05:23:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.254644808743169) internal successors, (19465), 4575 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19465 transitions. [2021-06-05 05:23:29,509 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19465 transitions. Word has length 23 [2021-06-05 05:23:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:29,509 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 19465 transitions. [2021-06-05 05:23:29,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19465 transitions. [2021-06-05 05:23:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:29,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:29,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:29,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 05:23:29,716 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:29,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1229746837, now seen corresponding path program 15 times [2021-06-05 05:23:29,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:29,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903092021] [2021-06-05 05:23:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:29,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:29,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903092021] [2021-06-05 05:23:29,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903092021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:29,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609038390] [2021-06-05 05:23:29,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:29,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:23:29,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:29,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 05:23:29,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:29,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:29,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:29,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 05:23:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609038390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:30,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:30,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136848656] [2021-06-05 05:23:30,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:30,106 INFO L87 Difference]: Start difference. First operand 4576 states and 19465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:31,109 INFO L93 Difference]: Finished difference Result 5090 states and 21438 transitions. [2021-06-05 05:23:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:23:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:31,120 INFO L225 Difference]: With dead ends: 5090 [2021-06-05 05:23:31,121 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 05:23:31,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 823.6ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:23:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 05:23:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4580. [2021-06-05 05:23:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.254422362961345) internal successors, (19481), 4579 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 19481 transitions. [2021-06-05 05:23:31,195 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 19481 transitions. Word has length 23 [2021-06-05 05:23:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:31,195 INFO L482 AbstractCegarLoop]: Abstraction has 4580 states and 19481 transitions. [2021-06-05 05:23:31,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 19481 transitions. [2021-06-05 05:23:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:31,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:31,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:31,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-05 05:23:31,403 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1722964223, now seen corresponding path program 16 times [2021-06-05 05:23:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:31,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55461019] [2021-06-05 05:23:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:31,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:31,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55461019] [2021-06-05 05:23:31,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55461019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:31,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611679443] [2021-06-05 05:23:31,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:31,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:31,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:31,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:31,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:31,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:31,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:23:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611679443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:31,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:31,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:31,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344887441] [2021-06-05 05:23:31,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:31,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:31,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:31,788 INFO L87 Difference]: Start difference. First operand 4580 states and 19481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:32,714 INFO L93 Difference]: Finished difference Result 5035 states and 21226 transitions. [2021-06-05 05:23:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:23:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:32,725 INFO L225 Difference]: With dead ends: 5035 [2021-06-05 05:23:32,725 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 05:23:32,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:23:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 05:23:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4576. [2021-06-05 05:23:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.254644808743169) internal successors, (19465), 4575 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19465 transitions. [2021-06-05 05:23:32,793 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19465 transitions. Word has length 23 [2021-06-05 05:23:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:32,793 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 19465 transitions. [2021-06-05 05:23:32,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19465 transitions. [2021-06-05 05:23:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:32,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:32,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:33,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:33,001 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash -788187967, now seen corresponding path program 17 times [2021-06-05 05:23:33,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:33,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426868548] [2021-06-05 05:23:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:33,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426868548] [2021-06-05 05:23:33,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426868548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505873987] [2021-06-05 05:23:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:33,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:33,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:33,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:33,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:33,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:33,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:33,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:33,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 05:23:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505873987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:33,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:33,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789053550] [2021-06-05 05:23:33,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:33,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:33,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:33,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:33,372 INFO L87 Difference]: Start difference. First operand 4576 states and 19465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:34,275 INFO L93 Difference]: Finished difference Result 5100 states and 21473 transitions. [2021-06-05 05:23:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:23:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:34,287 INFO L225 Difference]: With dead ends: 5100 [2021-06-05 05:23:34,287 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 05:23:34,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:23:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 05:23:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4580. [2021-06-05 05:23:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.254422362961345) internal successors, (19481), 4579 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 19481 transitions. [2021-06-05 05:23:34,360 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 19481 transitions. Word has length 23 [2021-06-05 05:23:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 4580 states and 19481 transitions. [2021-06-05 05:23:34,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 19481 transitions. [2021-06-05 05:23:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:34,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:34,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:34,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:34,568 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1800880499, now seen corresponding path program 18 times [2021-06-05 05:23:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:34,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008695965] [2021-06-05 05:23:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:34,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:34,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008695965] [2021-06-05 05:23:34,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008695965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:34,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945038079] [2021-06-05 05:23:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:34,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:23:34,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:34,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:34,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 05:23:34,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:34,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:34,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:34,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 05:23:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:34,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945038079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:34,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:34,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:34,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598897140] [2021-06-05 05:23:34,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:34,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:34,946 INFO L87 Difference]: Start difference. First operand 4580 states and 19481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:35,885 INFO L93 Difference]: Finished difference Result 5049 states and 21279 transitions. [2021-06-05 05:23:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:23:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:23:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:35,896 INFO L225 Difference]: With dead ends: 5049 [2021-06-05 05:23:35,896 INFO L226 Difference]: Without dead ends: 5028 [2021-06-05 05:23:35,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:23:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-06-05 05:23:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 4574. [2021-06-05 05:23:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 05:23:35,962 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 05:23:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:35,962 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 05:23:35,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 05:23:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:23:35,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:35,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:36,169 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash -652014379, now seen corresponding path program 19 times [2021-06-05 05:23:36,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:36,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49967866] [2021-06-05 05:23:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49967866] [2021-06-05 05:23:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49967866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225369605] [2021-06-05 05:23:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:23:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:36,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:36,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:36,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:36,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:36,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 05:23:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225369605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:36,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:36,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:23:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654546061] [2021-06-05 05:23:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:36,511 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:23:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:23:37,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 05:23:37,181 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:23:37,183 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:23:37,185 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:23:37,185 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:23:37 BasicIcfg [2021-06-05 05:23:37,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:23:37,185 INFO L168 Benchmark]: Toolchain (without parser) took 818065.40 ms. Allocated memory was 331.4 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 310.8 MB in the beginning and 538.6 MB in the end (delta: -227.9 MB). Peak memory consumption was 794.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:23:37,186 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 331.4 MB. Free memory was 312.0 MB in the beginning and 311.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:23:37,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.96 ms. Allocated memory is still 331.4 MB. Free memory was 310.7 MB in the beginning and 309.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:23:37,186 INFO L168 Benchmark]: Boogie Preprocessor took 12.78 ms. Allocated memory is still 331.4 MB. Free memory was 309.3 MB in the beginning and 308.3 MB in the end (delta: 996.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:23:37,186 INFO L168 Benchmark]: RCFGBuilder took 294.60 ms. Allocated memory is still 331.4 MB. Free memory was 308.1 MB in the beginning and 292.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 05:23:37,186 INFO L168 Benchmark]: TraceAbstraction took 817729.44 ms. Allocated memory was 331.4 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 292.5 MB in the beginning and 538.6 MB in the end (delta: -246.2 MB). Peak memory consumption was 777.8 MB. Max. memory is 16.0 GB. [2021-06-05 05:23:37,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 331.4 MB. Free memory was 312.0 MB in the beginning and 311.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.96 ms. Allocated memory is still 331.4 MB. Free memory was 310.7 MB in the beginning and 309.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.78 ms. Allocated memory is still 331.4 MB. Free memory was 309.3 MB in the beginning and 308.3 MB in the end (delta: 996.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 294.60 ms. Allocated memory is still 331.4 MB. Free memory was 308.1 MB in the beginning and 292.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 817729.44 ms. Allocated memory was 331.4 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 292.5 MB in the beginning and 538.6 MB in the end (delta: -246.2 MB). Peak memory consumption was 777.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4574states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (96 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4574states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (96 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4574states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (96 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4574states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (96 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4574states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (96 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 42 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 817565.3ms, OverallIterations: 596, TraceHistogramMax: 3, EmptinessCheckTime: 3499.4ms, AutomataDifference: 446901.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36870 SDtfs, 101116 SDslu, 354743 SDs, 0 SdLazy, 394483 SolverSat, 32007 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 157182.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25544 GetRequests, 8356 SyntacticMatches, 506 SemanticMatches, 16682 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102102 ImplicationChecksByTransitivity, 370321.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4583occurred in iteration=590, InterpolantAutomatonStates: 14365, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33576.7ms AutomataMinimizationTime, 595 MinimizatonAttempts, 255404 StatesRemovedByMinimization, 595 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2416.4ms SsaConstructionTime, 6082.7ms SatisfiabilityAnalysisTime, 192637.9ms InterpolantComputationTime, 27157 NumberOfCodeBlocks, 27157 NumberOfCodeBlocksAsserted, 1959 NumberOfCheckSat, 25966 ConstructedInterpolants, 33 QuantifiedInterpolants, 487922 SizeOfPredicates, 4032 NumberOfNonLiveVariables, 51961 ConjunctsInSsa, 18235 ConjunctsInUnsatCore, 1191 InterpolantComputations, 4 PerfectInterpolantSequences, 42/7350 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown