/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/popl20-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:06:37,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:06:37,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:06:37,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 06:06:37,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 06:06:37,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 06:06:37,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 06:06:37,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 06:06:37,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 06:06:37,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 06:06:37,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 06:06:37,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 06:06:37,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:06:37,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:06:37,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:06:37,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:06:37,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:06:37,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:06:37,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:06:37,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:06:37,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:06:37,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:06:37,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:06:37,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:06:37,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 06:06:37,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 06:06:37,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 06:06:37,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 06:06:37,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 06:06:37,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 06:06:37,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 06:06:37,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 06:06:37,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 06:06:37,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:06:37,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:06:37,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:06:37,127 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 06:06:37,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:06:37,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:06:37,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:06:37,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:06:37,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:06:37,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:06:37,156 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:06:37,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:06:37,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:06:37,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:06:37,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:06:37,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:06:37,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:06:37,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:06:37,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:06:37,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:06:37,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:06:37,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:06:37,423 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:06:37,425 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:06:37,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-06-05 06:06:37,425 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-06-05 06:06:37,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:06:37,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:06:37,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:06:37,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:06:37,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:06:37,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:06:37,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:06:37,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:06:37,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:06:37,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/1) ... [2021-06-05 06:06:37,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:06:37,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:06:37,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:06:37,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:06:37,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (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 06:06:37,541 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:06:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:06:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:06:37,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:06:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:06:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:06:37,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:06:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:06:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:06:37,543 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:06:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:06:37,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:06:37,544 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 06:06:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 06:06:37,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 06:06:37,545 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 06:06:37,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:06:37,895 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 06:06:37,895 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 06:06:37,895 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 06:06:37,896 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 06:06:37,896 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 06:06:37,896 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:06:37 BoogieIcfgContainer [2021-06-05 06:06:37,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:06:37,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:06:37,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:06:37,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:06:37,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:37" (1/2) ... [2021-06-05 06:06:37,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e329cd7 and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:06:37, skipping insertion in model container [2021-06-05 06:06:37,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:06:37" (2/2) ... [2021-06-05 06:06:37,901 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-06-05 06:06:37,904 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:06:37,904 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:06:37,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:06:37,905 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:06:37,941 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 06:06:37,956 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 06:06:37,977 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:06:37,977 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:06:37,977 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:06:37,978 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:06:37,978 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:06:37,978 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:06:37,978 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:06:37,978 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:06:37,983 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-06-05 06:06:37,994 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 06:06:38,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:38,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:38,002 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-06-05 06:06:38,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:38,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861652038] [2021-06-05 06:06:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,106 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 06:06:38,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861652038] [2021-06-05 06:06:38,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861652038] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:38,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:38,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:06:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411508067] [2021-06-05 06:06:38,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:06:38,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:06:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:38,122 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 06:06:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:38,159 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-06-05 06:06:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:38,160 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 06:06:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:38,171 INFO L225 Difference]: With dead ends: 94 [2021-06-05 06:06:38,172 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 06:06:38,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 06:06:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-06-05 06:06:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-06-05 06:06:38,209 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-06-05 06:06:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:38,210 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-06-05 06:06:38,210 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 06:06:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-06-05 06:06:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:38,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:38,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:38,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:06:38,213 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-06-05 06:06:38,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:38,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633444559] [2021-06-05 06:06:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,287 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 06:06:38,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:38,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633444559] [2021-06-05 06:06:38,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633444559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:38,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995662228] [2021-06-05 06:06:38,288 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 06:06:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:06:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:38,466 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 06:06:38,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995662228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:38,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:38,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 06:06:38,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093027975] [2021-06-05 06:06:38,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:06:38,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:38,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:06:38,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:06:38,468 INFO L87 Difference]: Start difference. First operand 89 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 06:06:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:38,501 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-06-05 06:06:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 16 [2021-06-05 06:06:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:38,502 INFO L225 Difference]: With dead ends: 120 [2021-06-05 06:06:38,502 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 06:06:38,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:06:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 06:06:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-06-05 06:06:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-06-05 06:06:38,509 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-06-05 06:06:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:38,509 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-06-05 06:06:38,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 06:06:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-06-05 06:06:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:38,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:38,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:38,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 06:06:38,725 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-06-05 06:06:38,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:38,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644430168] [2021-06-05 06:06:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,755 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 06:06:38,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:38,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644430168] [2021-06-05 06:06:38,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644430168] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:38,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:38,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:06:38,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213106602] [2021-06-05 06:06:38,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:06:38,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:06:38,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:38,756 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:38,766 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-06-05 06:06:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:06:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:38,768 INFO L225 Difference]: With dead ends: 129 [2021-06-05 06:06:38,768 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 06:06:38,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 06:06:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-06-05 06:06:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-06-05 06:06:38,775 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-06-05 06:06:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:38,775 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-06-05 06:06:38,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-06-05 06:06:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:38,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:38,776 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:38,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:06:38,776 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-06-05 06:06:38,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:38,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381712120] [2021-06-05 06:06:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,794 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 06:06:38,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:38,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381712120] [2021-06-05 06:06:38,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381712120] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:38,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:38,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:06:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984800226] [2021-06-05 06:06:38,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:06:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:06:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:38,796 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:38,801 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-06-05 06:06:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:06:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:38,802 INFO L225 Difference]: With dead ends: 76 [2021-06-05 06:06:38,802 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 06:06:38,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 06:06:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-06-05 06:06:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-06-05 06:06:38,808 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-06-05 06:06:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:38,808 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-06-05 06:06:38,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-06-05 06:06:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:38,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:38,809 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:38,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 06:06:38,809 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-06-05 06:06:38,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:38,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118746566] [2021-06-05 06:06:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,832 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 06:06:38,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118746566] [2021-06-05 06:06:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118746566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800146802] [2021-06-05 06:06:38,833 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 06:06:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:38,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:06:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:38,935 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 06:06:38,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800146802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:38,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:38,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 06:06:38,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741767620] [2021-06-05 06:06:38,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:06:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:06:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:06:38,937 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:38,950 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-06-05 06:06:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:38,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:06:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:38,951 INFO L225 Difference]: With dead ends: 115 [2021-06-05 06:06:38,951 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 06:06:38,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:06:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 06:06:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-06-05 06:06:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-06-05 06:06:38,957 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-06-05 06:06:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:38,957 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-06-05 06:06:38,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-06-05 06:06:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 06:06:38,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:38,958 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 06:06:39,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:39,174 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-06-05 06:06:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:39,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553533697] [2021-06-05 06:06:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:39,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553533697] [2021-06-05 06:06:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553533697] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:06:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968827663] [2021-06-05 06:06:39,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:06:39,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:06:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:39,202 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 06:06:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:39,212 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-06-05 06:06:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:39,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 06:06:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:39,215 INFO L225 Difference]: With dead ends: 57 [2021-06-05 06:06:39,215 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 06:06:39,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 06:06:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-06-05 06:06:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-06-05 06:06:39,218 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-06-05 06:06:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:39,218 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-06-05 06:06:39,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 06:06:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-06-05 06:06:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 06:06:39,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:39,219 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 06:06:39,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:06:39,219 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:39,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:39,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-06-05 06:06:39,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:39,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011404642] [2021-06-05 06:06:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:39,285 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 06:06:39,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:39,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011404642] [2021-06-05 06:06:39,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011404642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:39,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644499851] [2021-06-05 06:06:39,287 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 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 06:06:39,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:39,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:39,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:06:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:39,389 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 06:06:39,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644499851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:39,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:39,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 06:06:39,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426437808] [2021-06-05 06:06:39,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:06:39,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:06:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:06:39,391 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:39,438 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-06-05 06:06:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:06:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 06:06:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:39,439 INFO L225 Difference]: With dead ends: 93 [2021-06-05 06:06:39,439 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 06:06:39,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:06:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 06:06:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-06-05 06:06:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-06-05 06:06:39,443 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-06-05 06:06:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:39,444 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-06-05 06:06:39,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-06-05 06:06:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:06:39,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:39,445 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:39,645 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-06-05 06:06:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231081930] [2021-06-05 06:06:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:39,698 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 06:06:39,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:39,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231081930] [2021-06-05 06:06:39,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231081930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:39,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097766015] [2021-06-05 06:06:39,699 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 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 06:06:39,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:06:39,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:06:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:39,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097766015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:39,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:39,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 06:06:39,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685516105] [2021-06-05 06:06:39,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:06:39,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:39,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:06:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:39,949 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:40,058 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-06-05 06:06:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:40,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:06:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:40,059 INFO L225 Difference]: With dead ends: 144 [2021-06-05 06:06:40,059 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 06:06:40,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:06:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 06:06:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-06-05 06:06:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.5238095238095237) internal successors, (370), 105 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-06-05 06:06:40,075 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-06-05 06:06:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:40,075 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-06-05 06:06:40,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-06-05 06:06:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:06:40,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:40,076 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:40,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:40,277 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:40,277 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-06-05 06:06:40,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:40,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568848248] [2021-06-05 06:06:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:40,362 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 06:06:40,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:40,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568848248] [2021-06-05 06:06:40,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568848248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:40,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643197963] [2021-06-05 06:06:40,366 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 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 06:06:40,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:06:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:40,482 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 06:06:40,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643197963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:40,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:40,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 06:06:40,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118806641] [2021-06-05 06:06:40,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:06:40,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:06:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:40,484 INFO L87 Difference]: Start difference. First operand 106 states and 370 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 06:06:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:40,526 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-06-05 06:06:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:40,526 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 18 [2021-06-05 06:06:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:40,527 INFO L225 Difference]: With dead ends: 179 [2021-06-05 06:06:40,528 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 06:06:40,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:06:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 06:06:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-06-05 06:06:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.7196969696969697) internal successors, (491), 132 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-06-05 06:06:40,533 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-06-05 06:06:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:40,533 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-06-05 06:06:40,533 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 06:06:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-06-05 06:06:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:06:40,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:40,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:40,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:06:40,745 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-06-05 06:06:40,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:40,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324242074] [2021-06-05 06:06:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:40,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:40,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324242074] [2021-06-05 06:06:40,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324242074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:40,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833712931] [2021-06-05 06:06:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:06:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:40,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:06:40,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:40,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833712931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:40,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:40,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 06:06:40,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080815167] [2021-06-05 06:06:40,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:06:40,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:40,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:06:40,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:06:40,963 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 06:06:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:41,026 INFO L93 Difference]: Finished difference Result 214 states and 744 transitions. [2021-06-05 06:06:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:06:41,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 18 [2021-06-05 06:06:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:41,028 INFO L225 Difference]: With dead ends: 214 [2021-06-05 06:06:41,028 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 06:06:41,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:06:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 06:06:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-06-05 06:06:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.751552795031056) internal successors, (604), 161 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 604 transitions. [2021-06-05 06:06:41,032 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 604 transitions. Word has length 18 [2021-06-05 06:06:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:41,032 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 604 transitions. [2021-06-05 06:06:41,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 06:06:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 604 transitions. [2021-06-05 06:06:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:06:41,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:41,036 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:41,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:41,247 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-06-05 06:06:41,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:41,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133862852] [2021-06-05 06:06:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:41,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:41,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133862852] [2021-06-05 06:06:41,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133862852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:41,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698250425] [2021-06-05 06:06:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:06:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:06:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:41,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698250425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:41,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:41,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 06:06:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229558160] [2021-06-05 06:06:41,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:06:41,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:06:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:06:41,438 INFO L87 Difference]: Start difference. First operand 162 states and 604 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:41,456 INFO L93 Difference]: Finished difference Result 134 states and 469 transitions. [2021-06-05 06:06:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:06:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:06:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:41,457 INFO L225 Difference]: With dead ends: 134 [2021-06-05 06:06:41,457 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 06:06:41,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:06:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 06:06:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-05 06:06:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.624) internal successors, (453), 125 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 453 transitions. [2021-06-05 06:06:41,460 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 453 transitions. Word has length 18 [2021-06-05 06:06:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:41,461 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 453 transitions. [2021-06-05 06:06:41,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 453 transitions. [2021-06-05 06:06:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 06:06:41,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:41,461 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:41,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:41,681 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash 806923496, now seen corresponding path program 2 times [2021-06-05 06:06:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129997913] [2021-06-05 06:06:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:41,754 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 06:06:41,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129997913] [2021-06-05 06:06:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129997913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144763187] [2021-06-05 06:06:41,754 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 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 06:06:41,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:41,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:41,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:06:41,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:41,900 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 7 treesize of output 3 [2021-06-05 06:06:41,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:41,905 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 7 treesize of output 3 [2021-06-05 06:06:41,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:41,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:41,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:06:41,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 06:06:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:42,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144763187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:42,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:42,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 06:06:42,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873450206] [2021-06-05 06:06:42,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:06:42,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:06:42,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:06:42,046 INFO L87 Difference]: Start difference. First operand 126 states and 453 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 06:06:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:42,195 INFO L93 Difference]: Finished difference Result 144 states and 499 transitions. [2021-06-05 06:06:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:06:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 06:06:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:42,196 INFO L225 Difference]: With dead ends: 144 [2021-06-05 06:06:42,196 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 06:06:42,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:06:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 06:06:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-06-05 06:06:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.5757575757575757) internal successors, (472), 132 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 472 transitions. [2021-06-05 06:06:42,200 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 472 transitions. Word has length 19 [2021-06-05 06:06:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:42,200 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 472 transitions. [2021-06-05 06:06:42,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 06:06:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 472 transitions. [2021-06-05 06:06:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 06:06:42,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:42,201 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:42,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:06:42,417 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-06-05 06:06:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:42,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31267427] [2021-06-05 06:06:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:42,491 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 06:06:42,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:42,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31267427] [2021-06-05 06:06:42,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31267427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:42,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585686114] [2021-06-05 06:06:42,491 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 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 06:06:42,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:42,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:06:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:42,693 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 06:06:42,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585686114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:42,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:42,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 06:06:42,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17537330] [2021-06-05 06:06:42,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:06:42,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:06:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:06:42,694 INFO L87 Difference]: Start difference. First operand 133 states and 472 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 06:06:42,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:42,768 INFO L93 Difference]: Finished difference Result 261 states and 960 transitions. [2021-06-05 06:06:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:06:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 06:06:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:42,770 INFO L225 Difference]: With dead ends: 261 [2021-06-05 06:06:42,770 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 06:06:42,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 06:06:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2021-06-05 06:06:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.9404761904761907) internal successors, (662), 168 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 662 transitions. [2021-06-05 06:06:42,775 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 662 transitions. Word has length 19 [2021-06-05 06:06:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:42,775 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 662 transitions. [2021-06-05 06:06:42,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 06:06:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 662 transitions. [2021-06-05 06:06:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:42,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:42,775 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:42,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:06:42,989 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-06-05 06:06:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:42,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225519874] [2021-06-05 06:06:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:43,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:43,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225519874] [2021-06-05 06:06:43,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225519874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:43,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302355683] [2021-06-05 06:06:43,100 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 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 06:06:43,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:06:43,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:06:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:43,209 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 7 treesize of output 3 [2021-06-05 06:06:43,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:43,213 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 7 treesize of output 3 [2021-06-05 06:06:43,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:43,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:43,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:06:43,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 06:06:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:43,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302355683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:43,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:43,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 06:06:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46401473] [2021-06-05 06:06:43,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:43,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:43,347 INFO L87 Difference]: Start difference. First operand 169 states and 662 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:43,499 INFO L93 Difference]: Finished difference Result 287 states and 1060 transitions. [2021-06-05 06:06:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:06:43,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:43,501 INFO L225 Difference]: With dead ends: 287 [2021-06-05 06:06:43,501 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 06:06:43,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 06:06:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-06-05 06:06:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 4.0) internal successors, (752), 188 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 752 transitions. [2021-06-05 06:06:43,506 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 752 transitions. Word has length 20 [2021-06-05 06:06:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:43,506 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 752 transitions. [2021-06-05 06:06:43,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 752 transitions. [2021-06-05 06:06:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:43,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:43,507 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:43,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:43,720 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-06-05 06:06:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:43,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322224501] [2021-06-05 06:06:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:43,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322224501] [2021-06-05 06:06:43,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322224501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57187217] [2021-06-05 06:06:43,785 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 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 06:06:43,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:06:43,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:06:43,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:43,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57187217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:43,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:43,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 06:06:43,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659391739] [2021-06-05 06:06:43,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:43,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:43,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:43,916 INFO L87 Difference]: Start difference. First operand 189 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:43,976 INFO L93 Difference]: Finished difference Result 211 states and 810 transitions. [2021-06-05 06:06:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:43,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:43,978 INFO L225 Difference]: With dead ends: 211 [2021-06-05 06:06:43,978 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 06:06:43,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:06:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 06:06:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-06-05 06:06:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.968421052631579) internal successors, (754), 190 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 754 transitions. [2021-06-05 06:06:43,985 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 754 transitions. Word has length 20 [2021-06-05 06:06:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:43,985 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 754 transitions. [2021-06-05 06:06:43,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 754 transitions. [2021-06-05 06:06:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:43,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:43,985 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:44,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:06:44,201 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1959111699, now seen corresponding path program 3 times [2021-06-05 06:06:44,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:44,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253491768] [2021-06-05 06:06:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:44,304 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 06:06:44,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:44,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253491768] [2021-06-05 06:06:44,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253491768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:44,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442014665] [2021-06-05 06:06:44,304 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 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 06:06:44,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:06:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:06:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:44,424 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 7 treesize of output 3 [2021-06-05 06:06:44,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:44,428 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 7 treesize of output 3 [2021-06-05 06:06:44,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:44,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:44,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:06:44,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 06:06:44,539 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 06:06:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442014665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:44,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:44,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 06:06:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857395118] [2021-06-05 06:06:44,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:06:44,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:06:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:06:44,540 INFO L87 Difference]: Start difference. First operand 191 states and 754 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:44,636 INFO L93 Difference]: Finished difference Result 509 states and 2067 transitions. [2021-06-05 06:06:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:06:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:44,639 INFO L225 Difference]: With dead ends: 509 [2021-06-05 06:06:44,639 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 06:06:44,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 06:06:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 259. [2021-06-05 06:06:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 4.37984496124031) internal successors, (1130), 258 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 1130 transitions. [2021-06-05 06:06:44,646 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 1130 transitions. Word has length 20 [2021-06-05 06:06:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:44,647 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 1130 transitions. [2021-06-05 06:06:44,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 1130 transitions. [2021-06-05 06:06:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:44,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:44,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:44,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:06:44,863 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-06-05 06:06:44,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:44,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514643367] [2021-06-05 06:06:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:44,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514643367] [2021-06-05 06:06:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514643367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028007352] [2021-06-05 06:06:44,912 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 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 06:06:44,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:06:44,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:06:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028007352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:45,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:45,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 06:06:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146788615] [2021-06-05 06:06:45,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:45,149 INFO L87 Difference]: Start difference. First operand 259 states and 1130 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:45,248 INFO L93 Difference]: Finished difference Result 494 states and 2044 transitions. [2021-06-05 06:06:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:06:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:45,251 INFO L225 Difference]: With dead ends: 494 [2021-06-05 06:06:45,251 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 06:06:45,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 06:06:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 286. [2021-06-05 06:06:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 4.494736842105263) internal successors, (1281), 285 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1281 transitions. [2021-06-05 06:06:45,259 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1281 transitions. Word has length 20 [2021-06-05 06:06:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:45,259 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 1281 transitions. [2021-06-05 06:06:45,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1281 transitions. [2021-06-05 06:06:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:45,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:45,260 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:45,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 06:06:45,460 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:45,460 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-06-05 06:06:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:45,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345482519] [2021-06-05 06:06:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:45,502 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 06:06:45,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:45,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345482519] [2021-06-05 06:06:45,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345482519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:45,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639506318] [2021-06-05 06:06:45,502 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 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 06:06:45,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:45,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:06:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:45,641 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 06:06:45,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639506318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:45,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:45,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 06:06:45,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431371876] [2021-06-05 06:06:45,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:06:45,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:06:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:06:45,642 INFO L87 Difference]: Start difference. First operand 286 states and 1281 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 06:06:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:45,682 INFO L93 Difference]: Finished difference Result 345 states and 1496 transitions. [2021-06-05 06:06:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:06:45,682 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 20 [2021-06-05 06:06:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:45,684 INFO L225 Difference]: With dead ends: 345 [2021-06-05 06:06:45,684 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 06:06:45,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 06:06:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 294. [2021-06-05 06:06:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 4.505119453924915) internal successors, (1320), 293 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1320 transitions. [2021-06-05 06:06:45,690 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1320 transitions. Word has length 20 [2021-06-05 06:06:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:45,691 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 1320 transitions. [2021-06-05 06:06:45,691 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 06:06:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1320 transitions. [2021-06-05 06:06:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:45,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:45,691 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:45,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:45,905 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-06-05 06:06:45,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:45,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505551172] [2021-06-05 06:06:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:46,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505551172] [2021-06-05 06:06:46,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505551172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:46,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777096302] [2021-06-05 06:06:46,002 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 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 06:06:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:06:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:46,131 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 7 treesize of output 3 [2021-06-05 06:06:46,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:46,134 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 7 treesize of output 3 [2021-06-05 06:06:46,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:46,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:46,160 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 7 treesize of output 3 [2021-06-05 06:06:46,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:46,163 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 7 treesize of output 3 [2021-06-05 06:06:46,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:46,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:46,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:06:46,185 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-06-05 06:06:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:46,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777096302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:46,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:46,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 06:06:46,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541810297] [2021-06-05 06:06:46,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:46,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:46,251 INFO L87 Difference]: Start difference. First operand 294 states and 1320 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:46,454 INFO L93 Difference]: Finished difference Result 411 states and 1659 transitions. [2021-06-05 06:06:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:06:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 06:06:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:46,456 INFO L225 Difference]: With dead ends: 411 [2021-06-05 06:06:46,456 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 06:06:46,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 06:06:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 322. [2021-06-05 06:06:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.336448598130841) internal successors, (1392), 321 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1392 transitions. [2021-06-05 06:06:46,464 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1392 transitions. Word has length 21 [2021-06-05 06:06:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:46,464 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1392 transitions. [2021-06-05 06:06:46,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1392 transitions. [2021-06-05 06:06:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:46,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:46,465 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:46,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:06:46,681 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash -105496252, now seen corresponding path program 4 times [2021-06-05 06:06:46,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:46,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661918492] [2021-06-05 06:06:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:46,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661918492] [2021-06-05 06:06:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661918492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764807662] [2021-06-05 06:06:46,746 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 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 06:06:46,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:46,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:46,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:06:46,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:46,853 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 7 treesize of output 3 [2021-06-05 06:06:46,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:46,857 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 7 treesize of output 3 [2021-06-05 06:06:46,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:46,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:46,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:06:46,878 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 06:06:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764807662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:46,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:46,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:06:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396162803] [2021-06-05 06:06:46,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:46,984 INFO L87 Difference]: Start difference. First operand 322 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:06:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:47,230 INFO L93 Difference]: Finished difference Result 868 states and 3551 transitions. [2021-06-05 06:06:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:06:47,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 21 [2021-06-05 06:06:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:47,235 INFO L225 Difference]: With dead ends: 868 [2021-06-05 06:06:47,235 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 06:06:47,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:06:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 06:06:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-06-05 06:06:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.545893719806763) internal successors, (1882), 414 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1882 transitions. [2021-06-05 06:06:47,246 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1882 transitions. Word has length 21 [2021-06-05 06:06:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:47,246 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1882 transitions. [2021-06-05 06:06:47,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:06:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1882 transitions. [2021-06-05 06:06:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:47,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:47,248 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:47,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 06:06:47,461 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 5 times [2021-06-05 06:06:47,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:47,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973164587] [2021-06-05 06:06:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:47,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973164587] [2021-06-05 06:06:47,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973164587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959083491] [2021-06-05 06:06:47,545 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 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 06:06:47,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:06:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:06:47,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:47,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959083491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:47,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:47,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 06:06:47,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448653677] [2021-06-05 06:06:47,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:06:47,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:06:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:47,740 INFO L87 Difference]: Start difference. First operand 415 states and 1882 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:47,790 INFO L93 Difference]: Finished difference Result 431 states and 1910 transitions. [2021-06-05 06:06:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:06:47,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 06:06:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:47,792 INFO L225 Difference]: With dead ends: 431 [2021-06-05 06:06:47,792 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 06:06:47,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:06:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 06:06:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-06-05 06:06:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.531400966183575) internal successors, (1876), 414 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1876 transitions. [2021-06-05 06:06:47,810 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1876 transitions. Word has length 21 [2021-06-05 06:06:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:47,810 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1876 transitions. [2021-06-05 06:06:47,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1876 transitions. [2021-06-05 06:06:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:47,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:47,812 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:48,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:48,037 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-06-05 06:06:48,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:48,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363954193] [2021-06-05 06:06:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:48,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:48,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363954193] [2021-06-05 06:06:48,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363954193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:48,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624143917] [2021-06-05 06:06:48,097 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 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 06:06:48,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:06:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:06:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:48,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624143917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:48,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:48,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 06:06:48,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197265006] [2021-06-05 06:06:48,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:06:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:48,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:06:48,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:48,354 INFO L87 Difference]: Start difference. First operand 415 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:48,481 INFO L93 Difference]: Finished difference Result 1022 states and 4384 transitions. [2021-06-05 06:06:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:06:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 06:06:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:48,486 INFO L225 Difference]: With dead ends: 1022 [2021-06-05 06:06:48,486 INFO L226 Difference]: Without dead ends: 1006 [2021-06-05 06:06:48,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-05 06:06:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 655. [2021-06-05 06:06:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 4.792048929663609) internal successors, (3134), 654 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 3134 transitions. [2021-06-05 06:06:48,502 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 3134 transitions. Word has length 21 [2021-06-05 06:06:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:48,502 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 3134 transitions. [2021-06-05 06:06:48,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 3134 transitions. [2021-06-05 06:06:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:48,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:48,504 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:48,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 06:06:48,717 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:48,717 INFO L82 PathProgramCache]: Analyzing trace with hash -536313780, now seen corresponding path program 6 times [2021-06-05 06:06:48,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:48,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115879505] [2021-06-05 06:06:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:48,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:48,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115879505] [2021-06-05 06:06:48,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115879505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:48,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363689970] [2021-06-05 06:06:48,805 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 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 06:06:48,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:06:48,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:48,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:06:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:49,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363689970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:49,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:49,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 06:06:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134999321] [2021-06-05 06:06:49,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:06:49,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:06:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:06:49,019 INFO L87 Difference]: Start difference. First operand 655 states and 3134 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:06:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:49,108 INFO L93 Difference]: Finished difference Result 715 states and 3326 transitions. [2021-06-05 06:06:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:06:49,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:06:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:49,111 INFO L225 Difference]: With dead ends: 715 [2021-06-05 06:06:49,111 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 06:06:49,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 06:06:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 663. [2021-06-05 06:06:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-06-05 06:06:49,124 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-06-05 06:06:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:49,125 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-06-05 06:06:49,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:06:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-06-05 06:06:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:49,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:49,126 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:49,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 06:06:49,345 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 7 times [2021-06-05 06:06:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:49,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204682664] [2021-06-05 06:06:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:49,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204682664] [2021-06-05 06:06:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204682664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795148454] [2021-06-05 06:06:49,397 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 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 06:06:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:06:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:49,547 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 7 treesize of output 3 [2021-06-05 06:06:49,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:49,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:49,554 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 06:06:49,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-05 06:06:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:49,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795148454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:49,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:49,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 06:06:49,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837038015] [2021-06-05 06:06:49,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:06:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:06:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:49,582 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:49,689 INFO L93 Difference]: Finished difference Result 745 states and 3433 transitions. [2021-06-05 06:06:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:06:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 06:06:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:49,692 INFO L225 Difference]: With dead ends: 745 [2021-06-05 06:06:49,692 INFO L226 Difference]: Without dead ends: 740 [2021-06-05 06:06:49,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-05 06:06:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 663. [2021-06-05 06:06:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-06-05 06:06:49,707 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-06-05 06:06:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:49,707 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-06-05 06:06:49,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-06-05 06:06:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:49,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:49,708 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:49,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 06:06:49,925 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash -979212920, now seen corresponding path program 8 times [2021-06-05 06:06:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:49,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794761108] [2021-06-05 06:06:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:50,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794761108] [2021-06-05 06:06:50,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794761108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:50,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355737719] [2021-06-05 06:06:50,040 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 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 06:06:50,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:50,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:06:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355737719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:50,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:50,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 06:06:50,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246468044] [2021-06-05 06:06:50,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:06:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:06:50,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:06:50,239 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:06:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:50,421 INFO L93 Difference]: Finished difference Result 706 states and 3296 transitions. [2021-06-05 06:06:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:06:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:06:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:50,425 INFO L225 Difference]: With dead ends: 706 [2021-06-05 06:06:50,425 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 06:06:50,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:06:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 06:06:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2021-06-05 06:06:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 4.774436090225564) internal successors, (3175), 665 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 3175 transitions. [2021-06-05 06:06:50,436 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 3175 transitions. Word has length 21 [2021-06-05 06:06:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:50,437 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 3175 transitions. [2021-06-05 06:06:50,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 06:06:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 3175 transitions. [2021-06-05 06:06:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:50,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:50,438 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:50,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 06:06:50,649 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 9 times [2021-06-05 06:06:50,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:50,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813897172] [2021-06-05 06:06:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:50,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813897172] [2021-06-05 06:06:50,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813897172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:50,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476914599] [2021-06-05 06:06:50,725 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 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 06:06:50,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:06:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:06:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476914599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:50,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:50,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 06:06:50,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604703894] [2021-06-05 06:06:50,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:06:50,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:06:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:50,908 INFO L87 Difference]: Start difference. First operand 666 states and 3175 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:51,142 INFO L93 Difference]: Finished difference Result 1302 states and 5669 transitions. [2021-06-05 06:06:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:06:51,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 06:06:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:51,147 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 06:06:51,147 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 06:06:51,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:06:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 06:06:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 737. [2021-06-05 06:06:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 4.794836956521739) internal successors, (3529), 736 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 3529 transitions. [2021-06-05 06:06:51,162 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 3529 transitions. Word has length 21 [2021-06-05 06:06:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:51,162 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 3529 transitions. [2021-06-05 06:06:51,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 3529 transitions. [2021-06-05 06:06:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:06:51,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:51,164 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 06:06:51,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:51,377 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-06-05 06:06:51,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:51,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403684621] [2021-06-05 06:06:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,440 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 06:06:51,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:51,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403684621] [2021-06-05 06:06:51,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403684621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:51,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912220577] [2021-06-05 06:06:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:06:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:06:51,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:51,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912220577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:51,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:51,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 06:06:51,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431452576] [2021-06-05 06:06:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:51,709 INFO L87 Difference]: Start difference. First operand 737 states and 3529 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 06:06:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:52,030 INFO L93 Difference]: Finished difference Result 910 states and 3945 transitions. [2021-06-05 06:06:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:06:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 06:06:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:52,034 INFO L225 Difference]: With dead ends: 910 [2021-06-05 06:06:52,034 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 06:06:52,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 06:06:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2021-06-05 06:06:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 4.806020066889632) internal successors, (2874), 598 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2874 transitions. [2021-06-05 06:06:52,045 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2874 transitions. Word has length 21 [2021-06-05 06:06:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:52,045 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 2874 transitions. [2021-06-05 06:06:52,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 06:06:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2874 transitions. [2021-06-05 06:06:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:52,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:52,047 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:52,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:06:52,261 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 6 times [2021-06-05 06:06:52,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:52,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182419958] [2021-06-05 06:06:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:52,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182419958] [2021-06-05 06:06:52,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182419958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980621094] [2021-06-05 06:06:52,367 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 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 06:06:52,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:06:52,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:06:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:52,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980621094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:52,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:52,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:06:52,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725940161] [2021-06-05 06:06:52,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:06:52,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:06:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:52,577 INFO L87 Difference]: Start difference. First operand 599 states and 2874 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:52,768 INFO L93 Difference]: Finished difference Result 792 states and 3525 transitions. [2021-06-05 06:06:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:06:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:52,771 INFO L225 Difference]: With dead ends: 792 [2021-06-05 06:06:52,772 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 06:06:52,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:06:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 06:06:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-06-05 06:06:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 4.821192052980132) internal successors, (2912), 604 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2912 transitions. [2021-06-05 06:06:52,783 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2912 transitions. Word has length 22 [2021-06-05 06:06:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:52,783 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 2912 transitions. [2021-06-05 06:06:52,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2912 transitions. [2021-06-05 06:06:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:52,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:52,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:53,001 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 10 times [2021-06-05 06:06:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659863410] [2021-06-05 06:06:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:53,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659863410] [2021-06-05 06:06:53,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659863410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819412216] [2021-06-05 06:06:53,077 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 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 06:06:53,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:06:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:53,193 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 7 treesize of output 3 [2021-06-05 06:06:53,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:53,197 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 7 treesize of output 3 [2021-06-05 06:06:53,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:53,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:53,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:06:53,219 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-06-05 06:06:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:53,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819412216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:53,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:53,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 06:06:53,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970333146] [2021-06-05 06:06:53,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:06:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:06:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:06:53,389 INFO L87 Difference]: Start difference. First operand 605 states and 2912 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 06:06:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:53,615 INFO L93 Difference]: Finished difference Result 1203 states and 5352 transitions. [2021-06-05 06:06:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:06:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 22 [2021-06-05 06:06:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:53,620 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 06:06:53,620 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 06:06:53,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:06:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 06:06:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 781. [2021-06-05 06:06:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.96025641025641) internal successors, (3869), 780 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3869 transitions. [2021-06-05 06:06:53,634 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3869 transitions. Word has length 22 [2021-06-05 06:06:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:53,635 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 3869 transitions. [2021-06-05 06:06:53,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 06:06:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3869 transitions. [2021-06-05 06:06:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:53,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:53,636 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:53,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 06:06:53,852 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 11 times [2021-06-05 06:06:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:53,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242478824] [2021-06-05 06:06:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:53,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242478824] [2021-06-05 06:06:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242478824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225962150] [2021-06-05 06:06:53,966 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 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 06:06:54,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:06:54,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:06:54,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:54,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225962150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:54,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:54,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:06:54,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990560821] [2021-06-05 06:06:54,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:06:54,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:54,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:06:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:54,258 INFO L87 Difference]: Start difference. First operand 781 states and 3869 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:54,610 INFO L93 Difference]: Finished difference Result 869 states and 4146 transitions. [2021-06-05 06:06:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:06:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:54,614 INFO L225 Difference]: With dead ends: 869 [2021-06-05 06:06:54,614 INFO L226 Difference]: Without dead ends: 864 [2021-06-05 06:06:54,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:06:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-06-05 06:06:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 789. [2021-06-05 06:06:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 4.963197969543147) internal successors, (3911), 788 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3911 transitions. [2021-06-05 06:06:54,628 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3911 transitions. Word has length 22 [2021-06-05 06:06:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:54,628 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 3911 transitions. [2021-06-05 06:06:54,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3911 transitions. [2021-06-05 06:06:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:54,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:54,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:54,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 06:06:54,844 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 12 times [2021-06-05 06:06:54,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:54,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214060242] [2021-06-05 06:06:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:54,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:54,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214060242] [2021-06-05 06:06:54,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214060242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:54,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163004404] [2021-06-05 06:06:54,957 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 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 06:06:55,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:06:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:06:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:55,159 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 7 treesize of output 3 [2021-06-05 06:06:55,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:55,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:55,168 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 06:06:55,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-05 06:06:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:55,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163004404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:55,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:55,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 06:06:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297969596] [2021-06-05 06:06:55,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:06:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:06:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:55,215 INFO L87 Difference]: Start difference. First operand 789 states and 3911 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 06:06:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:55,458 INFO L93 Difference]: Finished difference Result 1170 states and 5326 transitions. [2021-06-05 06:06:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:06:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 22 [2021-06-05 06:06:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:55,462 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 06:06:55,462 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 06:06:55,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:06:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 06:06:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 809. [2021-06-05 06:06:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.951732673267327) internal successors, (4001), 808 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 4001 transitions. [2021-06-05 06:06:55,477 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 4001 transitions. Word has length 22 [2021-06-05 06:06:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:55,477 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 4001 transitions. [2021-06-05 06:06:55,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 06:06:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 4001 transitions. [2021-06-05 06:06:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:55,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:55,479 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:55,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 06:06:55,685 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 13 times [2021-06-05 06:06:55,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:55,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983513582] [2021-06-05 06:06:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:55,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983513582] [2021-06-05 06:06:55,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983513582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932925736] [2021-06-05 06:06:55,782 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 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 06:06:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:55,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:06:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:55,970 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 7 treesize of output 3 [2021-06-05 06:06:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:55,974 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 7 treesize of output 3 [2021-06-05 06:06:55,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:56,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:56,003 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 06:06:56,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-06-05 06:06:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932925736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:56,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:56,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 06:06:56,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966860740] [2021-06-05 06:06:56,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:06:56,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:06:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:56,063 INFO L87 Difference]: Start difference. First operand 809 states and 4001 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:56,177 INFO L93 Difference]: Finished difference Result 958 states and 4478 transitions. [2021-06-05 06:06:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:06:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:56,180 INFO L225 Difference]: With dead ends: 958 [2021-06-05 06:06:56,180 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 06:06:56,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:06:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 06:06:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 817. [2021-06-05 06:06:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 4.922794117647059) internal successors, (4017), 816 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 4017 transitions. [2021-06-05 06:06:56,193 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 4017 transitions. Word has length 22 [2021-06-05 06:06:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:56,193 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 4017 transitions. [2021-06-05 06:06:56,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 4017 transitions. [2021-06-05 06:06:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:56,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:56,195 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:56,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:56,409 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 14 times [2021-06-05 06:06:56,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:56,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890783644] [2021-06-05 06:06:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:56,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:56,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890783644] [2021-06-05 06:06:56,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890783644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:56,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261899541] [2021-06-05 06:06:56,523 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 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 06:06:56,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:56,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:06:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:56,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261899541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:56,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:56,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:06:56,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492768823] [2021-06-05 06:06:56,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:06:56,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:56,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:06:56,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:56,704 INFO L87 Difference]: Start difference. First operand 817 states and 4017 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:56,935 INFO L93 Difference]: Finished difference Result 1066 states and 4874 transitions. [2021-06-05 06:06:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:06:56,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:56,938 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 06:06:56,938 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 06:06:56,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:06:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 06:06:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 837. [2021-06-05 06:06:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 4.927033492822966) internal successors, (4119), 836 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 4119 transitions. [2021-06-05 06:06:56,951 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 4119 transitions. Word has length 22 [2021-06-05 06:06:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:56,951 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 4119 transitions. [2021-06-05 06:06:56,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 4119 transitions. [2021-06-05 06:06:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:56,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:56,953 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:57,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 06:06:57,153 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-06-05 06:06:57,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:57,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607279295] [2021-06-05 06:06:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:57,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607279295] [2021-06-05 06:06:57,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607279295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:57,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761311453] [2021-06-05 06:06:57,238 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 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 06:06:57,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:06:57,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:06:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:57,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761311453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:57,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:57,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:06:57,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592153969] [2021-06-05 06:06:57,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:06:57,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:06:57,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:57,440 INFO L87 Difference]: Start difference. First operand 837 states and 4119 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:57,556 INFO L93 Difference]: Finished difference Result 896 states and 4308 transitions. [2021-06-05 06:06:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:06:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:57,558 INFO L225 Difference]: With dead ends: 896 [2021-06-05 06:06:57,558 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 06:06:57,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:06:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 06:06:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 842. [2021-06-05 06:06:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 4.915576694411415) internal successors, (4134), 841 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 4134 transitions. [2021-06-05 06:06:57,571 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 4134 transitions. Word has length 22 [2021-06-05 06:06:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:57,571 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 4134 transitions. [2021-06-05 06:06:57,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 4134 transitions. [2021-06-05 06:06:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:57,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:57,573 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:57,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:57,779 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-06-05 06:06:57,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:57,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890958325] [2021-06-05 06:06:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:57,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:57,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890958325] [2021-06-05 06:06:57,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890958325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:57,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88149055] [2021-06-05 06:06:57,902 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 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 06:06:57,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:57,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:06:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:58,248 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 7 treesize of output 3 [2021-06-05 06:06:58,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:58,287 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-06-05 06:06:58,289 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 7 treesize of output 3 [2021-06-05 06:06:58,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:58,307 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-06-05 06:06:58,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:06:58,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-06-05 06:06:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88149055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:58,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:58,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:06:58,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420120815] [2021-06-05 06:06:58,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:06:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:06:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:06:58,338 INFO L87 Difference]: Start difference. First operand 842 states and 4134 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 06:06:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:58,640 INFO L93 Difference]: Finished difference Result 947 states and 4449 transitions. [2021-06-05 06:06:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:06:58,641 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 22 [2021-06-05 06:06:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:58,643 INFO L225 Difference]: With dead ends: 947 [2021-06-05 06:06:58,643 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 06:06:58,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:06:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 06:06:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 847. [2021-06-05 06:06:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 4.914893617021277) internal successors, (4158), 846 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4158 transitions. [2021-06-05 06:06:58,656 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4158 transitions. Word has length 22 [2021-06-05 06:06:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:58,656 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 4158 transitions. [2021-06-05 06:06:58,656 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 06:06:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4158 transitions. [2021-06-05 06:06:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:58,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:58,658 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:58,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:58,861 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:58,861 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-06-05 06:06:58,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:58,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599216653] [2021-06-05 06:06:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:58,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:58,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599216653] [2021-06-05 06:06:58,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599216653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:58,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552653132] [2021-06-05 06:06:58,913 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 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 06:06:59,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:06:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:06:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:59,128 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 7 treesize of output 3 [2021-06-05 06:06:59,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:59,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:59,133 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 06:06:59,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 06:06:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552653132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:59,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:59,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:06:59,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526079468] [2021-06-05 06:06:59,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:59,155 INFO L87 Difference]: Start difference. First operand 847 states and 4158 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:59,361 INFO L93 Difference]: Finished difference Result 1380 states and 6250 transitions. [2021-06-05 06:06:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:06:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:59,364 INFO L225 Difference]: With dead ends: 1380 [2021-06-05 06:06:59,364 INFO L226 Difference]: Without dead ends: 1371 [2021-06-05 06:06:59,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:06:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-06-05 06:06:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 902. [2021-06-05 06:06:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 4.988901220865705) internal successors, (4495), 901 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 4495 transitions. [2021-06-05 06:06:59,380 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 4495 transitions. Word has length 22 [2021-06-05 06:06:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:59,380 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 4495 transitions. [2021-06-05 06:06:59,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 4495 transitions. [2021-06-05 06:06:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:59,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:59,382 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:59,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 06:06:59,589 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-06-05 06:06:59,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:59,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513670521] [2021-06-05 06:06:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:59,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513670521] [2021-06-05 06:06:59,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513670521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922127847] [2021-06-05 06:06:59,656 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 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 06:06:59,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:06:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:00,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922127847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:00,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:00,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 06:07:00,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353005584] [2021-06-05 06:07:00,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:00,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:00,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:00,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:00,004 INFO L87 Difference]: Start difference. First operand 902 states and 4495 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:00,262 INFO L93 Difference]: Finished difference Result 929 states and 4570 transitions. [2021-06-05 06:07:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:07:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:07:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:00,265 INFO L225 Difference]: With dead ends: 929 [2021-06-05 06:07:00,265 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 06:07:00,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:07:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 06:07:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 909. [2021-06-05 06:07:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.973568281938326) internal successors, (4516), 908 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 4516 transitions. [2021-06-05 06:07:00,278 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 4516 transitions. Word has length 22 [2021-06-05 06:07:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:00,279 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 4516 transitions. [2021-06-05 06:07:00,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 4516 transitions. [2021-06-05 06:07:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:07:00,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:00,280 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:00,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:00,493 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-06-05 06:07:00,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:00,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563461929] [2021-06-05 06:07:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:00,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563461929] [2021-06-05 06:07:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563461929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124432156] [2021-06-05 06:07:00,640 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 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 06:07:00,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:07:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:01,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124432156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:01,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:01,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 06:07:01,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666443261] [2021-06-05 06:07:01,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:01,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:01,029 INFO L87 Difference]: Start difference. First operand 909 states and 4516 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:01,337 INFO L93 Difference]: Finished difference Result 936 states and 4581 transitions. [2021-06-05 06:07:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:07:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:01,339 INFO L225 Difference]: With dead ends: 936 [2021-06-05 06:07:01,340 INFO L226 Difference]: Without dead ends: 934 [2021-06-05 06:07:01,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-05 06:07:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 907. [2021-06-05 06:07:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.970198675496689) internal successors, (4503), 906 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 4503 transitions. [2021-06-05 06:07:01,352 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 4503 transitions. Word has length 22 [2021-06-05 06:07:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:01,352 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 4503 transitions. [2021-06-05 06:07:01,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 4503 transitions. [2021-06-05 06:07:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:07:01,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:01,354 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:01,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 06:07:01,555 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:01,555 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 6 times [2021-06-05 06:07:01,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:01,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589976984] [2021-06-05 06:07:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:01,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:01,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589976984] [2021-06-05 06:07:01,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589976984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:01,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577071586] [2021-06-05 06:07:01,626 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 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 06:07:01,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:01,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:01,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:02,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577071586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:02,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:02,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 06:07:02,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259553805] [2021-06-05 06:07:02,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:02,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:02,008 INFO L87 Difference]: Start difference. First operand 907 states and 4503 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:02,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:02,208 INFO L93 Difference]: Finished difference Result 929 states and 4558 transitions. [2021-06-05 06:07:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:07:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:07:02,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:02,210 INFO L225 Difference]: With dead ends: 929 [2021-06-05 06:07:02,210 INFO L226 Difference]: Without dead ends: 928 [2021-06-05 06:07:02,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-05 06:07:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 908. [2021-06-05 06:07:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 4.965821389195149) internal successors, (4504), 907 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 4504 transitions. [2021-06-05 06:07:02,224 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 4504 transitions. Word has length 22 [2021-06-05 06:07:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:02,225 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 4504 transitions. [2021-06-05 06:07:02,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 4504 transitions. [2021-06-05 06:07:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:02,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:02,226 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:02,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:02,441 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-06-05 06:07:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:02,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962758368] [2021-06-05 06:07:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:02,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:02,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962758368] [2021-06-05 06:07:02,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962758368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:02,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733667909] [2021-06-05 06:07:02,524 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 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 06:07:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:07:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:02,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733667909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:02,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:02,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:07:02,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032235045] [2021-06-05 06:07:02,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:02,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:02,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:02,862 INFO L87 Difference]: Start difference. First operand 908 states and 4504 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 06:07:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:03,059 INFO L93 Difference]: Finished difference Result 952 states and 4606 transitions. [2021-06-05 06:07:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:03,060 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 06:07:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:03,062 INFO L225 Difference]: With dead ends: 952 [2021-06-05 06:07:03,062 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 06:07:03,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 06:07:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 906. [2021-06-05 06:07:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.942541436464088) internal successors, (4473), 905 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 4473 transitions. [2021-06-05 06:07:03,074 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 4473 transitions. Word has length 23 [2021-06-05 06:07:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:03,074 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 4473 transitions. [2021-06-05 06:07:03,075 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 06:07:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 4473 transitions. [2021-06-05 06:07:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:03,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:03,076 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:03,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 06:07:03,278 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-06-05 06:07:03,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:03,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284673942] [2021-06-05 06:07:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:03,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:03,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284673942] [2021-06-05 06:07:03,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284673942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234046359] [2021-06-05 06:07:03,367 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 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 06:07:03,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:03,586 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 7 treesize of output 3 [2021-06-05 06:07:03,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:03,590 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 7 treesize of output 3 [2021-06-05 06:07:03,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:03,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:03,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:03,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 06:07:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:03,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234046359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:03,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:03,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 06:07:03,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163119191] [2021-06-05 06:07:03,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:03,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:03,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:03,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:03,720 INFO L87 Difference]: Start difference. First operand 906 states and 4473 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:03,786 INFO L93 Difference]: Finished difference Result 1075 states and 4663 transitions. [2021-06-05 06:07:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:07:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:03,788 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 06:07:03,788 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 06:07:03,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 06:07:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 772. [2021-06-05 06:07:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 4.752269779507134) internal successors, (3664), 771 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3664 transitions. [2021-06-05 06:07:03,801 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3664 transitions. Word has length 23 [2021-06-05 06:07:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:03,801 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 3664 transitions. [2021-06-05 06:07:03,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3664 transitions. [2021-06-05 06:07:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:03,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:03,805 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:04,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:04,009 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-06-05 06:07:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129947910] [2021-06-05 06:07:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:04,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129947910] [2021-06-05 06:07:04,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129947910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837460242] [2021-06-05 06:07:04,088 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 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 06:07:04,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:07:04,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:04,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837460242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:04,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:04,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:07:04,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128206149] [2021-06-05 06:07:04,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:04,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:04,350 INFO L87 Difference]: Start difference. First operand 772 states and 3664 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 06:07:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:04,448 INFO L93 Difference]: Finished difference Result 833 states and 3832 transitions. [2021-06-05 06:07:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:04,448 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 06:07:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:04,449 INFO L225 Difference]: With dead ends: 833 [2021-06-05 06:07:04,449 INFO L226 Difference]: Without dead ends: 827 [2021-06-05 06:07:04,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-05 06:07:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 774. [2021-06-05 06:07:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.745148771021992) internal successors, (3668), 773 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3668 transitions. [2021-06-05 06:07:04,461 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3668 transitions. Word has length 23 [2021-06-05 06:07:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:04,461 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3668 transitions. [2021-06-05 06:07:04,461 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 06:07:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3668 transitions. [2021-06-05 06:07:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:04,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:04,463 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:04,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:04,679 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 18 times [2021-06-05 06:07:04,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:04,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133966614] [2021-06-05 06:07:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:04,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:04,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133966614] [2021-06-05 06:07:04,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133966614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:04,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486953078] [2021-06-05 06:07:04,768 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 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 06:07:04,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:04,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:04,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:05,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486953078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:05,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:07:05,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296183350] [2021-06-05 06:07:05,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:05,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:05,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:05,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:05,100 INFO L87 Difference]: Start difference. First operand 774 states and 3668 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 06:07:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:05,221 INFO L93 Difference]: Finished difference Result 830 states and 3817 transitions. [2021-06-05 06:07:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:05,221 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 06:07:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:05,222 INFO L225 Difference]: With dead ends: 830 [2021-06-05 06:07:05,222 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 06:07:05,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 06:07:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 776. [2021-06-05 06:07:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 4.736774193548387) internal successors, (3671), 775 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 3671 transitions. [2021-06-05 06:07:05,234 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 3671 transitions. Word has length 23 [2021-06-05 06:07:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:05,234 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 3671 transitions. [2021-06-05 06:07:05,234 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 06:07:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 3671 transitions. [2021-06-05 06:07:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:05,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:05,235 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:05,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:05,444 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1208762112, now seen corresponding path program 19 times [2021-06-05 06:07:05,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:05,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473900561] [2021-06-05 06:07:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:07:05,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:05,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473900561] [2021-06-05 06:07:05,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473900561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927440290] [2021-06-05 06:07:05,569 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 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 06:07:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:05,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:07:05,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927440290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:05,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 06:07:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997565709] [2021-06-05 06:07:05,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:07:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:07:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:07:05,859 INFO L87 Difference]: Start difference. First operand 776 states and 3671 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 06:07:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:06,023 INFO L93 Difference]: Finished difference Result 941 states and 4147 transitions. [2021-06-05 06:07:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 06:07:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:06,024 INFO L225 Difference]: With dead ends: 941 [2021-06-05 06:07:06,024 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 06:07:06,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 06:07:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 773. [2021-06-05 06:07:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 4.699481865284974) internal successors, (3628), 772 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3628 transitions. [2021-06-05 06:07:06,036 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3628 transitions. Word has length 23 [2021-06-05 06:07:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:06,036 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 3628 transitions. [2021-06-05 06:07:06,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 06:07:06,036 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3628 transitions. [2021-06-05 06:07:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:06,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:06,038 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:06,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:06,241 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1009797930, now seen corresponding path program 20 times [2021-06-05 06:07:06,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:06,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953847841] [2021-06-05 06:07:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:06,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:06,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953847841] [2021-06-05 06:07:06,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953847841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:06,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175571663] [2021-06-05 06:07:06,326 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 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 06:07:06,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:06,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:07:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175571663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:06,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:06,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:07:06,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213164644] [2021-06-05 06:07:06,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:06,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:06,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:06,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:06,749 INFO L87 Difference]: Start difference. First operand 773 states and 3628 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 06:07:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:06,902 INFO L93 Difference]: Finished difference Result 828 states and 3794 transitions. [2021-06-05 06:07:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:06,903 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 06:07:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:06,904 INFO L225 Difference]: With dead ends: 828 [2021-06-05 06:07:06,904 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 06:07:06,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:07:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 06:07:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 777. [2021-06-05 06:07:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 4.694587628865979) internal successors, (3643), 776 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 3643 transitions. [2021-06-05 06:07:06,915 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 3643 transitions. Word has length 23 [2021-06-05 06:07:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:06,915 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 3643 transitions. [2021-06-05 06:07:06,915 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 06:07:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 3643 transitions. [2021-06-05 06:07:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:06,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:06,917 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:07,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 06:07:07,133 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2053733564, now seen corresponding path program 21 times [2021-06-05 06:07:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384219360] [2021-06-05 06:07:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:07,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384219360] [2021-06-05 06:07:07,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384219360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138437759] [2021-06-05 06:07:07,204 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 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 06:07:07,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:07,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:07,337 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 7 treesize of output 3 [2021-06-05 06:07:07,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:07,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:07,345 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 7 treesize of output 3 [2021-06-05 06:07:07,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:07,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:07,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:07:07,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:14 [2021-06-05 06:07:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:07:07,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138437759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:07,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:07,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 06:07:07,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720425954] [2021-06-05 06:07:07,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:07:07,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:07,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:07:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:07:07,375 INFO L87 Difference]: Start difference. First operand 777 states and 3643 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:07:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:07,702 INFO L93 Difference]: Finished difference Result 867 states and 3843 transitions. [2021-06-05 06:07:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:07:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:07:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:07,704 INFO L225 Difference]: With dead ends: 867 [2021-06-05 06:07:07,704 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 06:07:07,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 06:07:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 763. [2021-06-05 06:07:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.66010498687664) internal successors, (3551), 762 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3551 transitions. [2021-06-05 06:07:07,715 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3551 transitions. Word has length 23 [2021-06-05 06:07:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:07,715 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3551 transitions. [2021-06-05 06:07:07,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 06:07:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3551 transitions. [2021-06-05 06:07:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:07,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:07,717 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 06:07:07,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:07,917 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash -50023488, now seen corresponding path program 7 times [2021-06-05 06:07:07,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:07,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556616394] [2021-06-05 06:07:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:08,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556616394] [2021-06-05 06:07:08,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556616394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311864153] [2021-06-05 06:07:08,010 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 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 06:07:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:07:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:08,117 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 7 treesize of output 3 [2021-06-05 06:07:08,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:08,120 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 7 treesize of output 3 [2021-06-05 06:07:08,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:08,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:08,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:08,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:62, output treesize:48 [2021-06-05 06:07:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:08,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311864153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:08,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:08,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 06:07:08,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311450384] [2021-06-05 06:07:08,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:07:08,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:07:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:07:08,215 INFO L87 Difference]: Start difference. First operand 763 states and 3551 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:08,431 INFO L93 Difference]: Finished difference Result 2342 states and 10200 transitions. [2021-06-05 06:07:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:07:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:08,435 INFO L225 Difference]: With dead ends: 2342 [2021-06-05 06:07:08,435 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 06:07:08,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 06:07:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1262. [2021-06-05 06:07:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.92466296590008) internal successors, (6210), 1261 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 6210 transitions. [2021-06-05 06:07:08,461 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 6210 transitions. Word has length 23 [2021-06-05 06:07:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:08,461 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 6210 transitions. [2021-06-05 06:07:08,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 6210 transitions. [2021-06-05 06:07:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:08,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:08,464 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:08,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:08,673 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:08,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2123404862, now seen corresponding path program 8 times [2021-06-05 06:07:08,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:08,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184128687] [2021-06-05 06:07:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:08,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184128687] [2021-06-05 06:07:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184128687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754624485] [2021-06-05 06:07:08,783 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 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 06:07:08,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:08,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:09,190 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 7 treesize of output 3 [2021-06-05 06:07:09,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:09,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:09,198 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 06:07:09,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754624485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:09,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:09,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:09,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600217348] [2021-06-05 06:07:09,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:09,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:09,230 INFO L87 Difference]: Start difference. First operand 1262 states and 6210 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:09,715 INFO L93 Difference]: Finished difference Result 1627 states and 7436 transitions. [2021-06-05 06:07:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:07:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:09,718 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 06:07:09,718 INFO L226 Difference]: Without dead ends: 1589 [2021-06-05 06:07:09,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-05 06:07:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1292. [2021-06-05 06:07:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.918667699457784) internal successors, (6350), 1291 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 6350 transitions. [2021-06-05 06:07:09,738 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 6350 transitions. Word has length 23 [2021-06-05 06:07:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:09,738 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 6350 transitions. [2021-06-05 06:07:09,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 6350 transitions. [2021-06-05 06:07:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:09,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:09,741 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:09,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 06:07:09,957 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1658839292, now seen corresponding path program 9 times [2021-06-05 06:07:09,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:09,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315391473] [2021-06-05 06:07:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:10,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:10,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315391473] [2021-06-05 06:07:10,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315391473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:10,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594331148] [2021-06-05 06:07:10,068 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 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 06:07:10,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:07:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:10,297 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 7 treesize of output 3 [2021-06-05 06:07:10,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:10,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:10,305 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 06:07:10,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 06:07:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:10,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594331148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:10,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:10,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:10,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915481026] [2021-06-05 06:07:10,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:10,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:10,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:10,335 INFO L87 Difference]: Start difference. First operand 1292 states and 6350 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 06:07:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:10,595 INFO L93 Difference]: Finished difference Result 2364 states and 10664 transitions. [2021-06-05 06:07:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:07:10,596 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 06:07:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:10,599 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 06:07:10,599 INFO L226 Difference]: Without dead ends: 2284 [2021-06-05 06:07:10,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-06-05 06:07:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1465. [2021-06-05 06:07:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 5.044398907103825) internal successors, (7385), 1464 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7385 transitions. [2021-06-05 06:07:10,623 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7385 transitions. Word has length 23 [2021-06-05 06:07:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:10,623 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7385 transitions. [2021-06-05 06:07:10,623 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 06:07:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7385 transitions. [2021-06-05 06:07:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:10,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:10,625 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:10,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 06:07:10,826 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:10,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1728663294, now seen corresponding path program 10 times [2021-06-05 06:07:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:10,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249790189] [2021-06-05 06:07:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:10,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249790189] [2021-06-05 06:07:10,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249790189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514787120] [2021-06-05 06:07:10,910 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 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 06:07:10,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:10,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:10,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:07:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:11,050 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 7 treesize of output 3 [2021-06-05 06:07:11,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:11,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:11,055 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 06:07:11,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-06-05 06:07:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:11,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514787120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:11,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:11,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 06:07:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009571529] [2021-06-05 06:07:11,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:11,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:11,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:11,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:11,083 INFO L87 Difference]: Start difference. First operand 1465 states and 7385 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:11,314 INFO L93 Difference]: Finished difference Result 2052 states and 9700 transitions. [2021-06-05 06:07:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:07:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:11,317 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 06:07:11,318 INFO L226 Difference]: Without dead ends: 2019 [2021-06-05 06:07:11,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-05 06:07:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1508. [2021-06-05 06:07:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 5.078964830789649) internal successors, (7654), 1507 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 7654 transitions. [2021-06-05 06:07:11,341 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 7654 transitions. Word has length 23 [2021-06-05 06:07:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:11,341 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 7654 transitions. [2021-06-05 06:07:11,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 7654 transitions. [2021-06-05 06:07:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:11,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:11,344 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:11,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 06:07:11,544 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:11,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1215940152, now seen corresponding path program 11 times [2021-06-05 06:07:11,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:11,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576255800] [2021-06-05 06:07:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:11,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576255800] [2021-06-05 06:07:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576255800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339524364] [2021-06-05 06:07:11,601 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 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 06:07:11,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:11,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:11,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:11,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339524364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:11,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:11,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:07:11,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239251814] [2021-06-05 06:07:11,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:11,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:11,806 INFO L87 Difference]: Start difference. First operand 1508 states and 7654 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:11,958 INFO L93 Difference]: Finished difference Result 2203 states and 10357 transitions. [2021-06-05 06:07:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:11,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:07:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:11,962 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 06:07:11,963 INFO L226 Difference]: Without dead ends: 2160 [2021-06-05 06:07:11,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-05 06:07:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1464. [2021-06-05 06:07:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 5.1066302118933695) internal successors, (7471), 1463 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 7471 transitions. [2021-06-05 06:07:11,999 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 7471 transitions. Word has length 23 [2021-06-05 06:07:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:11,999 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 7471 transitions. [2021-06-05 06:07:11,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 7471 transitions. [2021-06-05 06:07:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:12,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:12,003 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:12,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:12,203 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 755994684, now seen corresponding path program 12 times [2021-06-05 06:07:12,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:12,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556781139] [2021-06-05 06:07:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:12,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:12,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556781139] [2021-06-05 06:07:12,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556781139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:12,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344205934] [2021-06-05 06:07:12,305 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 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 06:07:12,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:12,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:12,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:12,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344205934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:12,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:12,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158708426] [2021-06-05 06:07:12,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:12,651 INFO L87 Difference]: Start difference. First operand 1464 states and 7471 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:12,867 INFO L93 Difference]: Finished difference Result 1548 states and 7764 transitions. [2021-06-05 06:07:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:12,871 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 06:07:12,871 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 06:07:12,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 06:07:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1474. [2021-06-05 06:07:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 5.104548540393754) internal successors, (7519), 1473 states have internal predecessors, (7519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 7519 transitions. [2021-06-05 06:07:12,892 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 7519 transitions. Word has length 23 [2021-06-05 06:07:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:12,892 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 7519 transitions. [2021-06-05 06:07:12,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 7519 transitions. [2021-06-05 06:07:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:12,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:12,895 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:13,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 06:07:13,095 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash 75343520, now seen corresponding path program 13 times [2021-06-05 06:07:13,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:13,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9052162] [2021-06-05 06:07:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:13,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:13,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9052162] [2021-06-05 06:07:13,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9052162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:13,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55487736] [2021-06-05 06:07:13,217 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 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 06:07:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:13,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55487736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:13,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:13,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820464332] [2021-06-05 06:07:13,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:13,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:13,609 INFO L87 Difference]: Start difference. First operand 1474 states and 7519 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:13,868 INFO L93 Difference]: Finished difference Result 1546 states and 7729 transitions. [2021-06-05 06:07:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:13,871 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 06:07:13,871 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 06:07:13,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 06:07:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1473. [2021-06-05 06:07:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 5.102581521739131) internal successors, (7511), 1472 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 7511 transitions. [2021-06-05 06:07:13,891 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 7511 transitions. Word has length 23 [2021-06-05 06:07:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:13,891 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 7511 transitions. [2021-06-05 06:07:13,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 7511 transitions. [2021-06-05 06:07:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:13,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:13,894 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:14,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 06:07:14,094 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash 927963324, now seen corresponding path program 14 times [2021-06-05 06:07:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:14,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276200540] [2021-06-05 06:07:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:14,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276200540] [2021-06-05 06:07:14,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276200540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656746392] [2021-06-05 06:07:14,189 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 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 06:07:14,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:14,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:14,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656746392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:14,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:14,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:14,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835566577] [2021-06-05 06:07:14,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:14,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:14,429 INFO L87 Difference]: Start difference. First operand 1473 states and 7511 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:14,585 INFO L93 Difference]: Finished difference Result 1593 states and 7901 transitions. [2021-06-05 06:07:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:14,588 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 06:07:14,588 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 06:07:14,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 06:07:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1485. [2021-06-05 06:07:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 5.092991913746631) internal successors, (7558), 1484 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 7558 transitions. [2021-06-05 06:07:14,617 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 7558 transitions. Word has length 23 [2021-06-05 06:07:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:14,617 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 7558 transitions. [2021-06-05 06:07:14,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 7558 transitions. [2021-06-05 06:07:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:14,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:14,620 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:14,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:14,825 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -935773730, now seen corresponding path program 15 times [2021-06-05 06:07:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:14,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817636914] [2021-06-05 06:07:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:14,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:14,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817636914] [2021-06-05 06:07:14,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817636914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:14,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070828736] [2021-06-05 06:07:14,922 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 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 06:07:14,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:07:14,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:15,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070828736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:15,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:15,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:15,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613639938] [2021-06-05 06:07:15,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:15,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:15,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:15,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:15,194 INFO L87 Difference]: Start difference. First operand 1485 states and 7558 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:15,341 INFO L93 Difference]: Finished difference Result 1522 states and 7682 transitions. [2021-06-05 06:07:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:15,344 INFO L225 Difference]: With dead ends: 1522 [2021-06-05 06:07:15,344 INFO L226 Difference]: Without dead ends: 1517 [2021-06-05 06:07:15,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-06-05 06:07:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1487. [2021-06-05 06:07:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.088156123822342) internal successors, (7561), 1486 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7561 transitions. [2021-06-05 06:07:15,364 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7561 transitions. Word has length 23 [2021-06-05 06:07:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:15,364 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7561 transitions. [2021-06-05 06:07:15,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7561 transitions. [2021-06-05 06:07:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:15,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:15,366 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:15,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:07:15,567 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 503652088, now seen corresponding path program 16 times [2021-06-05 06:07:15,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:15,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427885665] [2021-06-05 06:07:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:15,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427885665] [2021-06-05 06:07:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427885665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383487845] [2021-06-05 06:07:15,682 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 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 06:07:15,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:15,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:16,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383487845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:16,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:16,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272751814] [2021-06-05 06:07:16,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:16,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:16,041 INFO L87 Difference]: Start difference. First operand 1487 states and 7561 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:16,268 INFO L93 Difference]: Finished difference Result 1542 states and 7723 transitions. [2021-06-05 06:07:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:16,271 INFO L225 Difference]: With dead ends: 1542 [2021-06-05 06:07:16,271 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 06:07:16,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 450.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 06:07:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1487. [2021-06-05 06:07:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.090847913862719) internal successors, (7565), 1486 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7565 transitions. [2021-06-05 06:07:16,291 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7565 transitions. Word has length 23 [2021-06-05 06:07:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:16,291 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7565 transitions. [2021-06-05 06:07:16,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7565 transitions. [2021-06-05 06:07:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:16,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:16,294 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:16,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 06:07:16,498 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:16,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1831271002, now seen corresponding path program 17 times [2021-06-05 06:07:16,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:16,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478063648] [2021-06-05 06:07:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:16,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:16,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478063648] [2021-06-05 06:07:16,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478063648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:16,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035495822] [2021-06-05 06:07:16,631 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 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 06:07:16,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:16,853 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 7 treesize of output 3 [2021-06-05 06:07:16,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:16,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:16,863 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 06:07:16,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:16,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035495822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:16,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:16,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:16,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102183978] [2021-06-05 06:07:16,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:16,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:16,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:16,896 INFO L87 Difference]: Start difference. First operand 1487 states and 7565 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:17,158 INFO L93 Difference]: Finished difference Result 2082 states and 9859 transitions. [2021-06-05 06:07:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:07:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:07:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:17,162 INFO L225 Difference]: With dead ends: 2082 [2021-06-05 06:07:17,163 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 06:07:17,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 06:07:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1495. [2021-06-05 06:07:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 5.153279785809906) internal successors, (7699), 1494 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 7699 transitions. [2021-06-05 06:07:17,186 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 7699 transitions. Word has length 23 [2021-06-05 06:07:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:17,186 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 7699 transitions. [2021-06-05 06:07:17,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 7699 transitions. [2021-06-05 06:07:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:17,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:17,189 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:17,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 06:07:17,405 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash 487248256, now seen corresponding path program 18 times [2021-06-05 06:07:17,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:17,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117769587] [2021-06-05 06:07:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:17,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:17,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117769587] [2021-06-05 06:07:17,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117769587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:17,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671260769] [2021-06-05 06:07:17,565 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 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 06:07:17,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671260769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:17,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:17,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:17,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472475368] [2021-06-05 06:07:17,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:17,955 INFO L87 Difference]: Start difference. First operand 1495 states and 7699 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:18,255 INFO L93 Difference]: Finished difference Result 1873 states and 8862 transitions. [2021-06-05 06:07:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:07:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:18,258 INFO L225 Difference]: With dead ends: 1873 [2021-06-05 06:07:18,258 INFO L226 Difference]: Without dead ends: 1829 [2021-06-05 06:07:18,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:07:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-05 06:07:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1491. [2021-06-05 06:07:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 5.063758389261745) internal successors, (7545), 1490 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 7545 transitions. [2021-06-05 06:07:18,280 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 7545 transitions. Word has length 23 [2021-06-05 06:07:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:18,280 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 7545 transitions. [2021-06-05 06:07:18,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 7545 transitions. [2021-06-05 06:07:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:18,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:18,283 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:18,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 06:07:18,495 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash -193402908, now seen corresponding path program 19 times [2021-06-05 06:07:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:18,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929833002] [2021-06-05 06:07:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:18,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:18,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929833002] [2021-06-05 06:07:18,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929833002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:18,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521931782] [2021-06-05 06:07:18,601 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 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 06:07:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:18,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521931782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:18,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:18,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:18,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571822417] [2021-06-05 06:07:18,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:18,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:19,000 INFO L87 Difference]: Start difference. First operand 1491 states and 7545 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:19,247 INFO L93 Difference]: Finished difference Result 1562 states and 7790 transitions. [2021-06-05 06:07:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:19,250 INFO L225 Difference]: With dead ends: 1562 [2021-06-05 06:07:19,250 INFO L226 Difference]: Without dead ends: 1557 [2021-06-05 06:07:19,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-05 06:07:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1498. [2021-06-05 06:07:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 5.055444221776887) internal successors, (7568), 1497 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 7568 transitions. [2021-06-05 06:07:19,271 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 7568 transitions. Word has length 23 [2021-06-05 06:07:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:19,271 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 7568 transitions. [2021-06-05 06:07:19,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 7568 transitions. [2021-06-05 06:07:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:19,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:19,273 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:19,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:19,487 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 659216896, now seen corresponding path program 20 times [2021-06-05 06:07:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:19,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284068781] [2021-06-05 06:07:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:19,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:19,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284068781] [2021-06-05 06:07:19,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284068781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:19,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118983769] [2021-06-05 06:07:19,600 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 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 06:07:19,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:19,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:19,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118983769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:19,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:19,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:19,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054513211] [2021-06-05 06:07:19,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:19,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:19,877 INFO L87 Difference]: Start difference. First operand 1498 states and 7568 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:20,179 INFO L93 Difference]: Finished difference Result 1612 states and 7977 transitions. [2021-06-05 06:07:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:20,182 INFO L225 Difference]: With dead ends: 1612 [2021-06-05 06:07:20,182 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 06:07:20,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 06:07:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1494. [2021-06-05 06:07:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 5.058271935699933) internal successors, (7552), 1493 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 7552 transitions. [2021-06-05 06:07:20,202 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 7552 transitions. Word has length 23 [2021-06-05 06:07:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:20,202 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 7552 transitions. [2021-06-05 06:07:20,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 06:07:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 7552 transitions. [2021-06-05 06:07:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:07:20,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:20,204 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:20,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 06:07:20,409 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash -617714144, now seen corresponding path program 21 times [2021-06-05 06:07:20,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:20,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519376981] [2021-06-05 06:07:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:20,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:20,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519376981] [2021-06-05 06:07:20,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519376981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:20,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155651972] [2021-06-05 06:07:20,517 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 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 06:07:20,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:20,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155651972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:20,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:20,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:07:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522750144] [2021-06-05 06:07:20,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:20,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:20,965 INFO L87 Difference]: Start difference. First operand 1494 states and 7552 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:21,184 INFO L93 Difference]: Finished difference Result 1565 states and 7788 transitions. [2021-06-05 06:07:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:21,187 INFO L225 Difference]: With dead ends: 1565 [2021-06-05 06:07:21,187 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 06:07:21,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 06:07:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1492. [2021-06-05 06:07:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 5.061032863849765) internal successors, (7546), 1491 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 7546 transitions. [2021-06-05 06:07:21,206 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 7546 transitions. Word has length 23 [2021-06-05 06:07:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:21,206 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 7546 transitions. [2021-06-05 06:07:21,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 06:07:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 7546 transitions. [2021-06-05 06:07:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:21,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:21,209 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:21,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:21,409 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1197073225, now seen corresponding path program 8 times [2021-06-05 06:07:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:21,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753082999] [2021-06-05 06:07:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:21,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:21,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753082999] [2021-06-05 06:07:21,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753082999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:21,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299943439] [2021-06-05 06:07:21,499 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 06:07:21,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:07:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:21,670 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 7 treesize of output 3 [2021-06-05 06:07:21,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:21,674 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 7 treesize of output 3 [2021-06-05 06:07:21,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:21,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:21,702 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 7 treesize of output 3 [2021-06-05 06:07:21,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:21,705 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 7 treesize of output 3 [2021-06-05 06:07:21,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:21,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:21,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:21,733 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-06-05 06:07:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:07:21,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299943439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:21,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:21,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 06:07:21,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203282120] [2021-06-05 06:07:21,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:07:21,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:21,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:07:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:07:21,813 INFO L87 Difference]: Start difference. First operand 1492 states and 7546 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:22,084 INFO L93 Difference]: Finished difference Result 1515 states and 6870 transitions. [2021-06-05 06:07:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:22,086 INFO L225 Difference]: With dead ends: 1515 [2021-06-05 06:07:22,086 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 06:07:22,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 06:07:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1269. [2021-06-05 06:07:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 4.833596214511041) internal successors, (6129), 1268 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 6129 transitions. [2021-06-05 06:07:22,104 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 6129 transitions. Word has length 24 [2021-06-05 06:07:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:22,104 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 6129 transitions. [2021-06-05 06:07:22,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 6129 transitions. [2021-06-05 06:07:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:22,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:22,106 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:22,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 06:07:22,306 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash -687625467, now seen corresponding path program 22 times [2021-06-05 06:07:22,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:22,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992108349] [2021-06-05 06:07:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:07:22,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:22,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992108349] [2021-06-05 06:07:22,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992108349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:22,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649127481] [2021-06-05 06:07:22,362 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 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 06:07:22,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:22,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:22,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:22,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:22,521 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 7 treesize of output 3 [2021-06-05 06:07:22,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:22,525 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 7 treesize of output 3 [2021-06-05 06:07:22,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:22,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:22,555 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 7 treesize of output 3 [2021-06-05 06:07:22,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:22,558 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 7 treesize of output 3 [2021-06-05 06:07:22,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:22,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:22,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:22,588 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-06-05 06:07:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:07:22,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649127481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:22,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:22,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 06:07:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798424194] [2021-06-05 06:07:22,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:07:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:07:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:07:22,656 INFO L87 Difference]: Start difference. First operand 1269 states and 6129 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 06:07:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:22,797 INFO L93 Difference]: Finished difference Result 1808 states and 7860 transitions. [2021-06-05 06:07:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:07:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 24 [2021-06-05 06:07:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:22,800 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 06:07:22,800 INFO L226 Difference]: Without dead ends: 1773 [2021-06-05 06:07:22,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-05 06:07:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1189. [2021-06-05 06:07:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 4.688552188552189) internal successors, (5570), 1188 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 5570 transitions. [2021-06-05 06:07:22,821 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 5570 transitions. Word has length 24 [2021-06-05 06:07:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:22,821 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 5570 transitions. [2021-06-05 06:07:22,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 06:07:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 5570 transitions. [2021-06-05 06:07:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:22,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:22,823 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:23,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:23,023 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1433709073, now seen corresponding path program 22 times [2021-06-05 06:07:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:23,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140876291] [2021-06-05 06:07:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:23,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:23,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140876291] [2021-06-05 06:07:23,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140876291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:23,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290528561] [2021-06-05 06:07:23,126 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 06:07:23,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:23,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:23,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290528561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:23,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:23,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:23,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783614455] [2021-06-05 06:07:23,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:23,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:23,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:23,647 INFO L87 Difference]: Start difference. First operand 1189 states and 5570 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:23,841 INFO L93 Difference]: Finished difference Result 1244 states and 5694 transitions. [2021-06-05 06:07:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:23,843 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 06:07:23,843 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 06:07:23,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 06:07:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1201. [2021-06-05 06:07:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.66) internal successors, (5592), 1200 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5592 transitions. [2021-06-05 06:07:23,858 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5592 transitions. Word has length 24 [2021-06-05 06:07:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:23,858 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5592 transitions. [2021-06-05 06:07:23,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5592 transitions. [2021-06-05 06:07:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:23,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:23,860 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:24,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:24,073 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1178323821, now seen corresponding path program 23 times [2021-06-05 06:07:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:24,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033271986] [2021-06-05 06:07:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:24,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:24,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033271986] [2021-06-05 06:07:24,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033271986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:24,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480845451] [2021-06-05 06:07:24,170 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 06:07:24,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:07:24,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:24,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:24,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480845451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:24,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:24,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:24,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379568147] [2021-06-05 06:07:24,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:24,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:24,598 INFO L87 Difference]: Start difference. First operand 1201 states and 5592 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:24,680 INFO L93 Difference]: Finished difference Result 1221 states and 5632 transitions. [2021-06-05 06:07:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:07:24,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:24,682 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 06:07:24,682 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 06:07:24,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 06:07:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1205. [2021-06-05 06:07:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.649501661129568) internal successors, (5598), 1204 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5598 transitions. [2021-06-05 06:07:24,699 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5598 transitions. Word has length 24 [2021-06-05 06:07:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:24,699 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5598 transitions. [2021-06-05 06:07:24,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5598 transitions. [2021-06-05 06:07:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:24,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:24,701 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:24,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 06:07:24,905 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1461893903, now seen corresponding path program 24 times [2021-06-05 06:07:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:24,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537215801] [2021-06-05 06:07:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:25,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:25,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537215801] [2021-06-05 06:07:25,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537215801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:25,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880996113] [2021-06-05 06:07:25,011 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 06:07:25,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:25,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:25,393 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 7 treesize of output 3 [2021-06-05 06:07:25,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:25,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:25,401 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 06:07:25,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880996113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:25,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:25,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:25,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593861049] [2021-06-05 06:07:25,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:25,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:25,434 INFO L87 Difference]: Start difference. First operand 1205 states and 5598 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:25,611 INFO L93 Difference]: Finished difference Result 1274 states and 5779 transitions. [2021-06-05 06:07:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 06:07:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:25,613 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 06:07:25,613 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 06:07:25,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 06:07:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1207. [2021-06-05 06:07:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 4.650912106135987) internal successors, (5609), 1206 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 5609 transitions. [2021-06-05 06:07:25,628 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 5609 transitions. Word has length 24 [2021-06-05 06:07:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:25,628 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 5609 transitions. [2021-06-05 06:07:25,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 5609 transitions. [2021-06-05 06:07:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:25,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:25,630 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:25,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 06:07:25,833 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:25,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1808359469, now seen corresponding path program 25 times [2021-06-05 06:07:25,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:25,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289929996] [2021-06-05 06:07:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:25,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:25,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289929996] [2021-06-05 06:07:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289929996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:25,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788896400] [2021-06-05 06:07:25,916 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 06:07:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:26,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788896400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:26,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:26,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:26,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110366434] [2021-06-05 06:07:26,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:26,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:26,427 INFO L87 Difference]: Start difference. First operand 1207 states and 5609 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:26,684 INFO L93 Difference]: Finished difference Result 1233 states and 5664 transitions. [2021-06-05 06:07:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:26,686 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 06:07:26,687 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 06:07:26,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 06:07:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2021-06-05 06:07:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.646179401993355) internal successors, (5594), 1204 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5594 transitions. [2021-06-05 06:07:26,702 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5594 transitions. Word has length 24 [2021-06-05 06:07:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:26,702 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5594 transitions. [2021-06-05 06:07:26,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5594 transitions. [2021-06-05 06:07:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:26,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:26,704 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:26,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:26,904 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash -800483755, now seen corresponding path program 26 times [2021-06-05 06:07:26,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:26,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133830962] [2021-06-05 06:07:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:27,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:27,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133830962] [2021-06-05 06:07:27,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133830962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:27,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334559894] [2021-06-05 06:07:27,014 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 06:07:27,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:27,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:27,281 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 7 treesize of output 3 [2021-06-05 06:07:27,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:27,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:27,289 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 06:07:27,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334559894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:27,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295831598] [2021-06-05 06:07:27,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:27,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:27,332 INFO L87 Difference]: Start difference. First operand 1205 states and 5594 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:27,662 INFO L93 Difference]: Finished difference Result 1253 states and 5719 transitions. [2021-06-05 06:07:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 06:07:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:27,664 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 06:07:27,664 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 06:07:27,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:07:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 06:07:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1201. [2021-06-05 06:07:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.651666666666666) internal successors, (5582), 1200 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5582 transitions. [2021-06-05 06:07:27,679 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5582 transitions. Word has length 24 [2021-06-05 06:07:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:27,679 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5582 transitions. [2021-06-05 06:07:27,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5582 transitions. [2021-06-05 06:07:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:27,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:27,681 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:27,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:27,889 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1506985901, now seen corresponding path program 27 times [2021-06-05 06:07:27,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:27,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438455693] [2021-06-05 06:07:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:28,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:28,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438455693] [2021-06-05 06:07:28,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438455693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:28,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742396485] [2021-06-05 06:07:28,010 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 06:07:28,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:28,357 INFO L446 ElimStorePlain]: Different costs {0=[node_2], 1=[v_prenex_27]} [2021-06-05 06:07:28,360 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 7 treesize of output 3 [2021-06-05 06:07:28,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:28,381 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-06-05 06:07:28,381 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-06-05 06:07:28,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:28,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:31 [2021-06-05 06:07:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:28,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742396485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:28,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:28,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504394681] [2021-06-05 06:07:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:28,422 INFO L87 Difference]: Start difference. First operand 1201 states and 5582 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:28,876 INFO L93 Difference]: Finished difference Result 1242 states and 5695 transitions. [2021-06-05 06:07:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:28,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:28,878 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 06:07:28,878 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 06:07:28,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:07:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 06:07:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1209. [2021-06-05 06:07:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 4.6490066225165565) internal successors, (5616), 1208 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 5616 transitions. [2021-06-05 06:07:28,894 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 5616 transitions. Word has length 24 [2021-06-05 06:07:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:28,894 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 5616 transitions. [2021-06-05 06:07:28,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 5616 transitions. [2021-06-05 06:07:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:28,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:28,896 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:29,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 06:07:29,097 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1553209715, now seen corresponding path program 28 times [2021-06-05 06:07:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:29,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580794564] [2021-06-05 06:07:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:29,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:29,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580794564] [2021-06-05 06:07:29,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580794564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:29,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345702268] [2021-06-05 06:07:29,192 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 06:07:29,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:29,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:29,382 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 7 treesize of output 3 [2021-06-05 06:07:29,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:29,385 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 7 treesize of output 3 [2021-06-05 06:07:29,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:29,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:29,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:29,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 06:07:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:29,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345702268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:29,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:29,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 06:07:29,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764656810] [2021-06-05 06:07:29,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:29,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:29,502 INFO L87 Difference]: Start difference. First operand 1209 states and 5616 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 06:07:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:29,761 INFO L93 Difference]: Finished difference Result 1237 states and 5305 transitions. [2021-06-05 06:07:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 24 [2021-06-05 06:07:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:29,764 INFO L225 Difference]: With dead ends: 1237 [2021-06-05 06:07:29,764 INFO L226 Difference]: Without dead ends: 1213 [2021-06-05 06:07:29,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-06-05 06:07:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1052. [2021-06-05 06:07:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.60418648905804) internal successors, (4839), 1051 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4839 transitions. [2021-06-05 06:07:29,778 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4839 transitions. Word has length 24 [2021-06-05 06:07:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:29,778 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 4839 transitions. [2021-06-05 06:07:29,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 06:07:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4839 transitions. [2021-06-05 06:07:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:29,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:29,780 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:29,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:29,993 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash 528495791, now seen corresponding path program 29 times [2021-06-05 06:07:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:29,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827337628] [2021-06-05 06:07:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:30,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:30,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827337628] [2021-06-05 06:07:30,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827337628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:30,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124168554] [2021-06-05 06:07:30,103 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 06:07:30,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:07:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:30,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124168554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:30,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:30,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:30,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57835560] [2021-06-05 06:07:30,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:30,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:30,511 INFO L87 Difference]: Start difference. First operand 1052 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:30,690 INFO L93 Difference]: Finished difference Result 1096 states and 4937 transitions. [2021-06-05 06:07:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:30,692 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 06:07:30,692 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 06:07:30,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 06:07:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2021-06-05 06:07:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.598665395614871) internal successors, (4824), 1049 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4824 transitions. [2021-06-05 06:07:30,705 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4824 transitions. Word has length 24 [2021-06-05 06:07:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4824 transitions. [2021-06-05 06:07:30,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4824 transitions. [2021-06-05 06:07:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:30,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:30,707 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:30,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:30,907 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1069230183, now seen corresponding path program 30 times [2021-06-05 06:07:30,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:30,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709435148] [2021-06-05 06:07:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:31,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:31,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709435148] [2021-06-05 06:07:31,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709435148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:31,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589776518] [2021-06-05 06:07:31,055 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 06:07:31,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:31,318 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 7 treesize of output 3 [2021-06-05 06:07:31,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:31,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:31,327 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 06:07:31,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 06:07:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:31,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589776518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:31,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:31,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:31,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885847271] [2021-06-05 06:07:31,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:31,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:31,363 INFO L87 Difference]: Start difference. First operand 1050 states and 4824 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:31,510 INFO L93 Difference]: Finished difference Result 1099 states and 4955 transitions. [2021-06-05 06:07:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 06:07:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:31,512 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 06:07:31,512 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 06:07:31,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 06:07:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1046. [2021-06-05 06:07:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.604784688995215) internal successors, (4812), 1045 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4812 transitions. [2021-06-05 06:07:31,525 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4812 transitions. Word has length 24 [2021-06-05 06:07:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:31,525 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4812 transitions. [2021-06-05 06:07:31,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4812 transitions. [2021-06-05 06:07:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:31,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:31,527 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:31,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 06:07:31,727 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1249973783, now seen corresponding path program 31 times [2021-06-05 06:07:31,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:31,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310859178] [2021-06-05 06:07:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:31,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310859178] [2021-06-05 06:07:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310859178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387195676] [2021-06-05 06:07:31,902 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 06:07:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:31,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:32,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387195676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:32,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:32,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:32,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705466230] [2021-06-05 06:07:32,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:32,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:32,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:32,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:32,183 INFO L87 Difference]: Start difference. First operand 1046 states and 4812 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:32,419 INFO L93 Difference]: Finished difference Result 1140 states and 5064 transitions. [2021-06-05 06:07:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:32,421 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 06:07:32,421 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 06:07:32,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 06:07:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1059. [2021-06-05 06:07:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 4.581285444234404) internal successors, (4847), 1058 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4847 transitions. [2021-06-05 06:07:32,434 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4847 transitions. Word has length 24 [2021-06-05 06:07:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:32,434 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 4847 transitions. [2021-06-05 06:07:32,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4847 transitions. [2021-06-05 06:07:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:32,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:32,435 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:32,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:32,637 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1775732329, now seen corresponding path program 32 times [2021-06-05 06:07:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:32,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606467829] [2021-06-05 06:07:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:32,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606467829] [2021-06-05 06:07:32,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606467829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514407322] [2021-06-05 06:07:32,823 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 06:07:32,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:32,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:33,111 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 7 treesize of output 3 [2021-06-05 06:07:33,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:33,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:33,119 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 06:07:33,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:33,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514407322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:33,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:33,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:33,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113969881] [2021-06-05 06:07:33,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:33,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:33,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:33,152 INFO L87 Difference]: Start difference. First operand 1059 states and 4847 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:33,445 INFO L93 Difference]: Finished difference Result 1101 states and 4957 transitions. [2021-06-05 06:07:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:33,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:33,448 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 06:07:33,448 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 06:07:33,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:07:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 06:07:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1061. [2021-06-05 06:07:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.583018867924529) internal successors, (4858), 1060 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4858 transitions. [2021-06-05 06:07:33,461 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4858 transitions. Word has length 24 [2021-06-05 06:07:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:33,461 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 4858 transitions. [2021-06-05 06:07:33,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4858 transitions. [2021-06-05 06:07:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:33,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:33,463 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:33,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:33,663 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2102593587, now seen corresponding path program 33 times [2021-06-05 06:07:33,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:33,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492740040] [2021-06-05 06:07:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:33,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:33,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492740040] [2021-06-05 06:07:33,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492740040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:33,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005381588] [2021-06-05 06:07:33,792 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 06:07:33,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:34,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005381588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:34,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:34,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:34,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005561180] [2021-06-05 06:07:34,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:34,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:34,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:34,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:34,107 INFO L87 Difference]: Start difference. First operand 1061 states and 4858 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:34,309 INFO L93 Difference]: Finished difference Result 1142 states and 5070 transitions. [2021-06-05 06:07:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:34,311 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 06:07:34,311 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 06:07:34,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 06:07:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1048. [2021-06-05 06:07:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.6017191977077365) internal successors, (4818), 1047 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4818 transitions. [2021-06-05 06:07:34,324 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4818 transitions. Word has length 24 [2021-06-05 06:07:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:34,324 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4818 transitions. [2021-06-05 06:07:34,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4818 transitions. [2021-06-05 06:07:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:34,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:34,326 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:34,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:34,537 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2029878931, now seen corresponding path program 34 times [2021-06-05 06:07:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615062143] [2021-06-05 06:07:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:34,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615062143] [2021-06-05 06:07:34,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615062143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:34,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817025292] [2021-06-05 06:07:34,690 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 06:07:34,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:35,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817025292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:35,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:35,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 06:07:35,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990471643] [2021-06-05 06:07:35,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:35,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:35,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:35,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:35,135 INFO L87 Difference]: Start difference. First operand 1048 states and 4818 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:35,572 INFO L93 Difference]: Finished difference Result 1070 states and 4863 transitions. [2021-06-05 06:07:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:35,573 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:35,574 INFO L225 Difference]: With dead ends: 1070 [2021-06-05 06:07:35,575 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 06:07:35,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:07:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 06:07:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2021-06-05 06:07:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.5978987583572115) internal successors, (4814), 1047 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4814 transitions. [2021-06-05 06:07:35,588 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4814 transitions. Word has length 24 [2021-06-05 06:07:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:35,588 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4814 transitions. [2021-06-05 06:07:35,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4814 transitions. [2021-06-05 06:07:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:35,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:35,590 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:35,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:35,791 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2094923731, now seen corresponding path program 35 times [2021-06-05 06:07:35,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:35,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072400075] [2021-06-05 06:07:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:35,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072400075] [2021-06-05 06:07:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072400075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76805305] [2021-06-05 06:07:35,915 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 06:07:35,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:35,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:36,279 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 7 treesize of output 3 [2021-06-05 06:07:36,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:36,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:36,287 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 06:07:36,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:36,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76805305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:36,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:36,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:36,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002112341] [2021-06-05 06:07:36,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:36,321 INFO L87 Difference]: Start difference. First operand 1048 states and 4814 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:36,536 INFO L93 Difference]: Finished difference Result 1107 states and 4970 transitions. [2021-06-05 06:07:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:36,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:36,539 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 06:07:36,539 INFO L226 Difference]: Without dead ends: 1092 [2021-06-05 06:07:36,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-05 06:07:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1050. [2021-06-05 06:07:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.599618684461392) internal successors, (4825), 1049 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4825 transitions. [2021-06-05 06:07:36,553 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4825 transitions. Word has length 24 [2021-06-05 06:07:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:36,553 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4825 transitions. [2021-06-05 06:07:36,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4825 transitions. [2021-06-05 06:07:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:36,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:36,554 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:36,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:36,755 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1420116913, now seen corresponding path program 36 times [2021-06-05 06:07:36,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:36,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861937717] [2021-06-05 06:07:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:36,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861937717] [2021-06-05 06:07:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861937717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302373890] [2021-06-05 06:07:36,871 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 06:07:36,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:07:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:36,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:36,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302373890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:37,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:37,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:37,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345352198] [2021-06-05 06:07:37,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:37,292 INFO L87 Difference]: Start difference. First operand 1050 states and 4825 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:37,611 INFO L93 Difference]: Finished difference Result 1072 states and 4870 transitions. [2021-06-05 06:07:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:37,613 INFO L225 Difference]: With dead ends: 1072 [2021-06-05 06:07:37,614 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 06:07:37,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:07:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 06:07:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1046. [2021-06-05 06:07:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.598086124401914) internal successors, (4805), 1045 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4805 transitions. [2021-06-05 06:07:37,627 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4805 transitions. Word has length 24 [2021-06-05 06:07:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:37,627 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4805 transitions. [2021-06-05 06:07:37,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4805 transitions. [2021-06-05 06:07:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:37,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:37,628 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:37,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 06:07:37,829 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1692504397, now seen corresponding path program 37 times [2021-06-05 06:07:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:37,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257258382] [2021-06-05 06:07:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:37,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257258382] [2021-06-05 06:07:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257258382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:37,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42733220] [2021-06-05 06:07:37,962 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 06:07:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:37,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:38,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42733220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:38,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:38,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:38,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519528522] [2021-06-05 06:07:38,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:38,506 INFO L87 Difference]: Start difference. First operand 1046 states and 4805 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:38,788 INFO L93 Difference]: Finished difference Result 1067 states and 4747 transitions. [2021-06-05 06:07:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:38,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:38,790 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 06:07:38,790 INFO L226 Difference]: Without dead ends: 1049 [2021-06-05 06:07:38,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 678.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-05 06:07:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1009. [2021-06-05 06:07:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 4.565476190476191) internal successors, (4602), 1008 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 4602 transitions. [2021-06-05 06:07:38,802 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 4602 transitions. Word has length 24 [2021-06-05 06:07:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:38,802 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 4602 transitions. [2021-06-05 06:07:38,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 4602 transitions. [2021-06-05 06:07:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:38,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:38,803 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:39,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:39,004 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash -12313431, now seen corresponding path program 38 times [2021-06-05 06:07:39,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:39,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323739231] [2021-06-05 06:07:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:39,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323739231] [2021-06-05 06:07:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323739231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:39,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97560640] [2021-06-05 06:07:39,086 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 06:07:39,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:39,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:39,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:07:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:39,315 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 7 treesize of output 3 [2021-06-05 06:07:39,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:39,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:39,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:07:39,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:33 [2021-06-05 06:07:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:39,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97560640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:39,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:39,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:07:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045314605] [2021-06-05 06:07:39,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:39,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:39,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:39,365 INFO L87 Difference]: Start difference. First operand 1009 states and 4602 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:39,615 INFO L93 Difference]: Finished difference Result 1207 states and 4868 transitions. [2021-06-05 06:07:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:39,617 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 06:07:39,618 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 06:07:39,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 06:07:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 925. [2021-06-05 06:07:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 4.41991341991342) internal successors, (4084), 924 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 4084 transitions. [2021-06-05 06:07:39,630 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 4084 transitions. Word has length 24 [2021-06-05 06:07:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:39,630 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 4084 transitions. [2021-06-05 06:07:39,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 4084 transitions. [2021-06-05 06:07:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:39,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:39,631 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:39,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 06:07:39,832 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash -919528497, now seen corresponding path program 39 times [2021-06-05 06:07:39,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:39,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521241054] [2021-06-05 06:07:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:39,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521241054] [2021-06-05 06:07:39,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521241054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366934361] [2021-06-05 06:07:39,933 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 06:07:39,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:07:39,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366934361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:40,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:40,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:40,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593775114] [2021-06-05 06:07:40,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:40,407 INFO L87 Difference]: Start difference. First operand 925 states and 4084 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:40,847 INFO L93 Difference]: Finished difference Result 955 states and 4153 transitions. [2021-06-05 06:07:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:40,849 INFO L225 Difference]: With dead ends: 955 [2021-06-05 06:07:40,849 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 06:07:40,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:07:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 06:07:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2021-06-05 06:07:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 4.411447084233261) internal successors, (4085), 926 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 4085 transitions. [2021-06-05 06:07:40,860 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 4085 transitions. Word has length 24 [2021-06-05 06:07:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:40,860 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 4085 transitions. [2021-06-05 06:07:40,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 4085 transitions. [2021-06-05 06:07:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:40,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:40,861 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:41,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 06:07:41,062 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1203098579, now seen corresponding path program 40 times [2021-06-05 06:07:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:41,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840092744] [2021-06-05 06:07:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:41,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:41,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840092744] [2021-06-05 06:07:41,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840092744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:41,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159492064] [2021-06-05 06:07:41,208 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 06:07:41,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:41,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:41,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:41,562 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 7 treesize of output 3 [2021-06-05 06:07:41,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:41,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:41,570 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 06:07:41,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:41,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159492064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:41,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:41,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:41,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778862989] [2021-06-05 06:07:41,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:41,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:41,606 INFO L87 Difference]: Start difference. First operand 927 states and 4085 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:42,065 INFO L93 Difference]: Finished difference Result 1002 states and 4289 transitions. [2021-06-05 06:07:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 06:07:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:42,066 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 06:07:42,066 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 06:07:42,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:07:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 06:07:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2021-06-05 06:07:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 4.411827956989248) internal successors, (4103), 930 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 4103 transitions. [2021-06-05 06:07:42,077 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 4103 transitions. Word has length 24 [2021-06-05 06:07:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:42,077 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 4103 transitions. [2021-06-05 06:07:42,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 4103 transitions. [2021-06-05 06:07:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:42,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:42,079 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:42,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 06:07:42,279 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2067154793, now seen corresponding path program 41 times [2021-06-05 06:07:42,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:42,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873788621] [2021-06-05 06:07:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:42,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873788621] [2021-06-05 06:07:42,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873788621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211748803] [2021-06-05 06:07:42,374 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 06:07:42,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:42,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211748803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:42,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:42,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:42,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376250373] [2021-06-05 06:07:42,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:42,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:42,800 INFO L87 Difference]: Start difference. First operand 931 states and 4103 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:42,889 INFO L93 Difference]: Finished difference Result 963 states and 4175 transitions. [2021-06-05 06:07:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:42,891 INFO L225 Difference]: With dead ends: 963 [2021-06-05 06:07:42,891 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 06:07:42,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 06:07:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 929. [2021-06-05 06:07:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 4.405172413793103) internal successors, (4088), 928 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 4088 transitions. [2021-06-05 06:07:42,902 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 4088 transitions. Word has length 24 [2021-06-05 06:07:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:42,902 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 4088 transitions. [2021-06-05 06:07:42,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 4088 transitions. [2021-06-05 06:07:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:42,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:42,903 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:43,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 06:07:43,104 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash -541688431, now seen corresponding path program 42 times [2021-06-05 06:07:43,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:43,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100287717] [2021-06-05 06:07:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:43,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:43,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100287717] [2021-06-05 06:07:43,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100287717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:43,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881198224] [2021-06-05 06:07:43,214 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 06:07:43,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:43,483 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 7 treesize of output 3 [2021-06-05 06:07:43,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:43,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:43,491 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 06:07:43,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:43,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881198224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:43,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:43,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:43,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812529208] [2021-06-05 06:07:43,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:43,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:43,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:43,527 INFO L87 Difference]: Start difference. First operand 929 states and 4088 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:43,659 INFO L93 Difference]: Finished difference Result 978 states and 4219 transitions. [2021-06-05 06:07:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 06:07:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:43,661 INFO L225 Difference]: With dead ends: 978 [2021-06-05 06:07:43,661 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 06:07:43,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 06:07:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 921. [2021-06-05 06:07:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 4.417391304347826) internal successors, (4064), 920 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 4064 transitions. [2021-06-05 06:07:43,672 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 4064 transitions. Word has length 24 [2021-06-05 06:07:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:43,673 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 4064 transitions. [2021-06-05 06:07:43,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 4064 transitions. [2021-06-05 06:07:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:43,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:43,674 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:43,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:43,877 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1248190577, now seen corresponding path program 43 times [2021-06-05 06:07:43,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:43,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181505715] [2021-06-05 06:07:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:43,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181505715] [2021-06-05 06:07:43,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181505715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51974906] [2021-06-05 06:07:43,982 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 06:07:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:44,236 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 7 treesize of output 3 [2021-06-05 06:07:44,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:44,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:44,245 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 06:07:44,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 06:07:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:44,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51974906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:44,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:44,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:44,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206844931] [2021-06-05 06:07:44,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:44,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:44,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:44,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:44,278 INFO L87 Difference]: Start difference. First operand 921 states and 4064 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:44,499 INFO L93 Difference]: Finished difference Result 962 states and 4159 transitions. [2021-06-05 06:07:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:44,501 INFO L225 Difference]: With dead ends: 962 [2021-06-05 06:07:44,501 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 06:07:44,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:07:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 06:07:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 919. [2021-06-05 06:07:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 4.415032679738562) internal successors, (4053), 918 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 4053 transitions. [2021-06-05 06:07:44,512 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 4053 transitions. Word has length 24 [2021-06-05 06:07:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:44,512 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 4053 transitions. [2021-06-05 06:07:44,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 4053 transitions. [2021-06-05 06:07:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:44,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:44,514 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:44,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:44,714 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274925, now seen corresponding path program 44 times [2021-06-05 06:07:44,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:44,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830695426] [2021-06-05 06:07:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:44,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:44,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830695426] [2021-06-05 06:07:44,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830695426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:44,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078823153] [2021-06-05 06:07:44,808 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 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 06:07:44,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:44,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078823153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:45,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:45,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:45,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859170454] [2021-06-05 06:07:45,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:45,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:45,149 INFO L87 Difference]: Start difference. First operand 919 states and 4053 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:45,510 INFO L93 Difference]: Finished difference Result 945 states and 4108 transitions. [2021-06-05 06:07:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:45,512 INFO L225 Difference]: With dead ends: 945 [2021-06-05 06:07:45,512 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 06:07:45,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:07:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 06:07:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 917. [2021-06-05 06:07:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 4.41703056768559) internal successors, (4046), 916 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 4046 transitions. [2021-06-05 06:07:45,523 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 4046 transitions. Word has length 24 [2021-06-05 06:07:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:45,523 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 4046 transitions. [2021-06-05 06:07:45,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 4046 transitions. [2021-06-05 06:07:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:45,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:45,524 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:45,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 06:07:45,725 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1471845007, now seen corresponding path program 45 times [2021-06-05 06:07:45,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:45,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954573868] [2021-06-05 06:07:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:45,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:45,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954573868] [2021-06-05 06:07:45,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954573868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:45,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038449016] [2021-06-05 06:07:45,842 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 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 06:07:45,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:07:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:46,226 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 7 treesize of output 3 [2021-06-05 06:07:46,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:46,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:46,234 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 06:07:46,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 06:07:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038449016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:46,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:46,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:46,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662298796] [2021-06-05 06:07:46,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:46,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:46,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:46,267 INFO L87 Difference]: Start difference. First operand 917 states and 4046 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:46,440 INFO L93 Difference]: Finished difference Result 1234 states and 5095 transitions. [2021-06-05 06:07:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:07:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 06:07:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:46,443 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 06:07:46,443 INFO L226 Difference]: Without dead ends: 1207 [2021-06-05 06:07:46,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:07:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-05 06:07:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 959. [2021-06-05 06:07:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.458246346555324) internal successors, (4271), 958 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4271 transitions. [2021-06-05 06:07:46,455 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4271 transitions. Word has length 24 [2021-06-05 06:07:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:46,455 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4271 transitions. [2021-06-05 06:07:46,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 06:07:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4271 transitions. [2021-06-05 06:07:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:46,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:46,457 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:46,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 06:07:46,657 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1798408365, now seen corresponding path program 46 times [2021-06-05 06:07:46,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:46,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337796307] [2021-06-05 06:07:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:46,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:46,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337796307] [2021-06-05 06:07:46,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337796307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:46,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714326327] [2021-06-05 06:07:46,769 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 06:07:46,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714326327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:47,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:47,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:07:47,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213684636] [2021-06-05 06:07:47,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:47,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:47,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:47,237 INFO L87 Difference]: Start difference. First operand 959 states and 4271 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:47,568 INFO L93 Difference]: Finished difference Result 991 states and 4347 transitions. [2021-06-05 06:07:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:47,569 INFO L225 Difference]: With dead ends: 991 [2021-06-05 06:07:47,570 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 06:07:47,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:07:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 06:07:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 959. [2021-06-05 06:07:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.449895615866389) internal successors, (4263), 958 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4263 transitions. [2021-06-05 06:07:47,581 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4263 transitions. Word has length 24 [2021-06-05 06:07:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:47,581 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4263 transitions. [2021-06-05 06:07:47,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4263 transitions. [2021-06-05 06:07:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:47,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:47,582 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:47,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 06:07:47,783 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2054881064, now seen corresponding path program 23 times [2021-06-05 06:07:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:47,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661941756] [2021-06-05 06:07:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:07:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661941756] [2021-06-05 06:07:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661941756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876192834] [2021-06-05 06:07:47,841 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 06:07:47,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:47,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:07:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:48,082 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 7 treesize of output 3 [2021-06-05 06:07:48,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:48,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 06:07:48,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:48,108 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-06-05 06:07:48,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:07:48,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-06-05 06:07:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:07:48,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876192834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:48,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:48,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 06:07:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562791891] [2021-06-05 06:07:48,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:48,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:48,150 INFO L87 Difference]: Start difference. First operand 959 states and 4263 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:48,242 INFO L93 Difference]: Finished difference Result 920 states and 3669 transitions. [2021-06-05 06:07:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:07:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:48,243 INFO L225 Difference]: With dead ends: 920 [2021-06-05 06:07:48,243 INFO L226 Difference]: Without dead ends: 892 [2021-06-05 06:07:48,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-06-05 06:07:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 763. [2021-06-05 06:07:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.2204724409448815) internal successors, (3216), 762 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3216 transitions. [2021-06-05 06:07:48,253 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3216 transitions. Word has length 25 [2021-06-05 06:07:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:48,253 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3216 transitions. [2021-06-05 06:07:48,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3216 transitions. [2021-06-05 06:07:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:48,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:48,254 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:48,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:48,454 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1538598462, now seen corresponding path program 47 times [2021-06-05 06:07:48,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:48,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792251041] [2021-06-05 06:07:48,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:48,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792251041] [2021-06-05 06:07:48,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792251041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908517773] [2021-06-05 06:07:48,511 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 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 06:07:48,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:48,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:07:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:48,691 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 7 treesize of output 3 [2021-06-05 06:07:48,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:48,695 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 7 treesize of output 3 [2021-06-05 06:07:48,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:48,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:48,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:48,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:109, output treesize:95 [2021-06-05 06:07:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:49,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908517773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:49,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:49,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 06:07:49,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283366002] [2021-06-05 06:07:49,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:49,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:49,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:49,059 INFO L87 Difference]: Start difference. First operand 763 states and 3216 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 06:07:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:49,232 INFO L93 Difference]: Finished difference Result 1219 states and 4777 transitions. [2021-06-05 06:07:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-06-05 06:07:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:49,234 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 06:07:49,234 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 06:07:49,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 06:07:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 766. [2021-06-05 06:07:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 4.203921568627451) internal successors, (3216), 765 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 3216 transitions. [2021-06-05 06:07:49,245 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 3216 transitions. Word has length 25 [2021-06-05 06:07:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:49,245 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 3216 transitions. [2021-06-05 06:07:49,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 06:07:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 3216 transitions. [2021-06-05 06:07:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:49,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:49,247 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:49,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 06:07:49,447 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1293460578, now seen corresponding path program 48 times [2021-06-05 06:07:49,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:49,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145020562] [2021-06-05 06:07:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:49,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:49,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145020562] [2021-06-05 06:07:49,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145020562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:49,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846861788] [2021-06-05 06:07:49,619 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 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 06:07:49,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:07:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:07:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:50,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846861788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:50,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:50,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:50,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493391201] [2021-06-05 06:07:50,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:50,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:50,014 INFO L87 Difference]: Start difference. First operand 766 states and 3216 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:50,297 INFO L93 Difference]: Finished difference Result 817 states and 3362 transitions. [2021-06-05 06:07:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:07:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:50,298 INFO L225 Difference]: With dead ends: 817 [2021-06-05 06:07:50,299 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 06:07:50,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:07:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 06:07:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 774. [2021-06-05 06:07:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.186287192755498) internal successors, (3236), 773 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3236 transitions. [2021-06-05 06:07:50,308 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3236 transitions. Word has length 25 [2021-06-05 06:07:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:50,308 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3236 transitions. [2021-06-05 06:07:50,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3236 transitions. [2021-06-05 06:07:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:50,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:50,309 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:50,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:07:50,509 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1871613760, now seen corresponding path program 49 times [2021-06-05 06:07:50,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:50,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485632442] [2021-06-05 06:07:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:07:50,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:50,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485632442] [2021-06-05 06:07:50,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485632442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:50,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940500291] [2021-06-05 06:07:50,582 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 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 06:07:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:50,740 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 7 treesize of output 3 [2021-06-05 06:07:50,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:50,743 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 7 treesize of output 3 [2021-06-05 06:07:50,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:50,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:50,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:50,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 06:07:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:07:50,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940500291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:50,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:50,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 06:07:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183765588] [2021-06-05 06:07:50,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:50,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:50,901 INFO L87 Difference]: Start difference. First operand 774 states and 3236 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 06:07:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:51,094 INFO L93 Difference]: Finished difference Result 905 states and 3551 transitions. [2021-06-05 06:07:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-06-05 06:07:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:51,096 INFO L225 Difference]: With dead ends: 905 [2021-06-05 06:07:51,096 INFO L226 Difference]: Without dead ends: 865 [2021-06-05 06:07:51,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:07:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-06-05 06:07:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 778. [2021-06-05 06:07:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 4.175032175032175) internal successors, (3244), 777 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 3244 transitions. [2021-06-05 06:07:51,105 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 3244 transitions. Word has length 25 [2021-06-05 06:07:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:51,105 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 3244 transitions. [2021-06-05 06:07:51,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 06:07:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 3244 transitions. [2021-06-05 06:07:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:51,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:51,106 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:51,308 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1099408196, now seen corresponding path program 50 times [2021-06-05 06:07:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:51,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108359017] [2021-06-05 06:07:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:51,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108359017] [2021-06-05 06:07:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108359017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703100269] [2021-06-05 06:07:51,458 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 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 06:07:51,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:52,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703100269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:52,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:52,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:52,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183915207] [2021-06-05 06:07:52,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:52,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:52,005 INFO L87 Difference]: Start difference. First operand 778 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:52,371 INFO L93 Difference]: Finished difference Result 825 states and 3382 transitions. [2021-06-05 06:07:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:07:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:52,372 INFO L225 Difference]: With dead ends: 825 [2021-06-05 06:07:52,372 INFO L226 Difference]: Without dead ends: 816 [2021-06-05 06:07:52,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:07:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-05 06:07:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 786. [2021-06-05 06:07:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-06-05 06:07:52,382 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-06-05 06:07:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:52,382 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-06-05 06:07:52,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-06-05 06:07:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:52,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:52,383 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:52,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:52,584 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:52,584 INFO L82 PathProgramCache]: Analyzing trace with hash 213609916, now seen corresponding path program 51 times [2021-06-05 06:07:52,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:52,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772566892] [2021-06-05 06:07:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:52,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:52,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772566892] [2021-06-05 06:07:52,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772566892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:52,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500325767] [2021-06-05 06:07:52,810 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 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 06:07:52,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:07:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:53,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500325767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:53,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:53,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205436340] [2021-06-05 06:07:53,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:53,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:53,437 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:53,876 INFO L93 Difference]: Finished difference Result 833 states and 3402 transitions. [2021-06-05 06:07:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:07:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:53,877 INFO L225 Difference]: With dead ends: 833 [2021-06-05 06:07:53,877 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 06:07:53,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 922.4ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:07:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 06:07:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 786. [2021-06-05 06:07:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-06-05 06:07:53,886 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-06-05 06:07:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:53,887 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-06-05 06:07:53,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-06-05 06:07:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:53,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:53,888 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:54,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 06:07:54,088 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash 616680640, now seen corresponding path program 52 times [2021-06-05 06:07:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:54,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581037066] [2021-06-05 06:07:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:54,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:54,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581037066] [2021-06-05 06:07:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581037066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:54,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390281385] [2021-06-05 06:07:54,222 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 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 06:07:54,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:54,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:54,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390281385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:54,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:54,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:54,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576095617] [2021-06-05 06:07:54,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:54,565 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:54,803 INFO L93 Difference]: Finished difference Result 860 states and 3503 transitions. [2021-06-05 06:07:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:54,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:07:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:54,805 INFO L225 Difference]: With dead ends: 860 [2021-06-05 06:07:54,805 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 06:07:54,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:07:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 06:07:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 803. [2021-06-05 06:07:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.139650872817955) internal successors, (3320), 802 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3320 transitions. [2021-06-05 06:07:54,814 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3320 transitions. Word has length 25 [2021-06-05 06:07:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:54,815 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3320 transitions. [2021-06-05 06:07:54,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:54,815 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3320 transitions. [2021-06-05 06:07:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:54,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:54,816 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:55,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:55,016 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -691603366, now seen corresponding path program 53 times [2021-06-05 06:07:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:55,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689266763] [2021-06-05 06:07:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:55,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:55,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689266763] [2021-06-05 06:07:55,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689266763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:55,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304599245] [2021-06-05 06:07:55,156 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 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 06:07:55,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:07:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:55,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:55,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304599245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:55,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:55,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:55,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536860047] [2021-06-05 06:07:55,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:55,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:55,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:55,600 INFO L87 Difference]: Start difference. First operand 803 states and 3320 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:55,716 INFO L93 Difference]: Finished difference Result 846 states and 3446 transitions. [2021-06-05 06:07:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:55,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:07:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:55,718 INFO L225 Difference]: With dead ends: 846 [2021-06-05 06:07:55,718 INFO L226 Difference]: Without dead ends: 837 [2021-06-05 06:07:55,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-05 06:07:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 799. [2021-06-05 06:07:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.145363408521304) internal successors, (3308), 798 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3308 transitions. [2021-06-05 06:07:55,727 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3308 transitions. Word has length 25 [2021-06-05 06:07:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:55,727 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3308 transitions. [2021-06-05 06:07:55,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3308 transitions. [2021-06-05 06:07:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:55,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:55,729 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:55,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:55,929 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 905805466, now seen corresponding path program 54 times [2021-06-05 06:07:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926922046] [2021-06-05 06:07:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:55,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926922046] [2021-06-05 06:07:55,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926922046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702826072] [2021-06-05 06:07:55,999 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 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 06:07:56,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:56,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:56,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:56,198 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 7 treesize of output 3 [2021-06-05 06:07:56,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:56,202 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 7 treesize of output 3 [2021-06-05 06:07:56,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:56,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:56,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:07:56,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-05 06:07:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:56,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702826072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:56,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:56,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 06:07:56,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879169180] [2021-06-05 06:07:56,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:56,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:56,396 INFO L87 Difference]: Start difference. First operand 799 states and 3308 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:56,644 INFO L93 Difference]: Finished difference Result 858 states and 3412 transitions. [2021-06-05 06:07:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:07:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:07:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:56,645 INFO L225 Difference]: With dead ends: 858 [2021-06-05 06:07:56,645 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 06:07:56,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 06:07:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 791. [2021-06-05 06:07:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.111392405063291) internal successors, (3248), 790 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3248 transitions. [2021-06-05 06:07:56,655 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3248 transitions. Word has length 25 [2021-06-05 06:07:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:56,655 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3248 transitions. [2021-06-05 06:07:56,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3248 transitions. [2021-06-05 06:07:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:56,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:56,656 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:56,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 06:07:56,857 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1044989208, now seen corresponding path program 55 times [2021-06-05 06:07:56,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:56,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402471332] [2021-06-05 06:07:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:56,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:56,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402471332] [2021-06-05 06:07:56,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402471332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:56,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090682644] [2021-06-05 06:07:56,993 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 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 06:07:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:07:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:57,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090682644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:57,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:57,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:57,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42703233] [2021-06-05 06:07:57,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:57,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:57,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:57,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:57,447 INFO L87 Difference]: Start difference. First operand 791 states and 3248 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:57,682 INFO L93 Difference]: Finished difference Result 834 states and 3374 transitions. [2021-06-05 06:07:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:07:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:07:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:57,683 INFO L225 Difference]: With dead ends: 834 [2021-06-05 06:07:57,684 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 06:07:57,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:07:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 06:07:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 803. [2021-06-05 06:07:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.103491271820449) internal successors, (3291), 802 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3291 transitions. [2021-06-05 06:07:57,693 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3291 transitions. Word has length 25 [2021-06-05 06:07:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:57,693 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3291 transitions. [2021-06-05 06:07:57,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3291 transitions. [2021-06-05 06:07:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:57,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:57,694 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:57,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:57,894 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash 200017756, now seen corresponding path program 56 times [2021-06-05 06:07:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:57,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517787828] [2021-06-05 06:07:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:58,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517787828] [2021-06-05 06:07:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517787828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553864898] [2021-06-05 06:07:58,050 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 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 06:07:58,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:58,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:58,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:58,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553864898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:58,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:58,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:58,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319430141] [2021-06-05 06:07:58,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:58,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:58,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:58,519 INFO L87 Difference]: Start difference. First operand 803 states and 3291 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:58,782 INFO L93 Difference]: Finished difference Result 842 states and 3405 transitions. [2021-06-05 06:07:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:07:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:58,783 INFO L225 Difference]: With dead ends: 842 [2021-06-05 06:07:58,783 INFO L226 Difference]: Without dead ends: 833 [2021-06-05 06:07:58,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:07:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-06-05 06:07:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 799. [2021-06-05 06:07:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.109022556390977) internal successors, (3279), 798 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3279 transitions. [2021-06-05 06:07:58,792 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3279 transitions. Word has length 25 [2021-06-05 06:07:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:58,792 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3279 transitions. [2021-06-05 06:07:58,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3279 transitions. [2021-06-05 06:07:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:58,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:58,794 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:58,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:58,994 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash 875475964, now seen corresponding path program 57 times [2021-06-05 06:07:58,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:58,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207729313] [2021-06-05 06:07:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:59,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:59,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207729313] [2021-06-05 06:07:59,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207729313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:59,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725401210] [2021-06-05 06:07:59,127 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 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 06:07:59,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:07:59,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:07:59,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:59,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725401210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:59,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:07:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738509745] [2021-06-05 06:07:59,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:59,620 INFO L87 Difference]: Start difference. First operand 799 states and 3279 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:59,916 INFO L93 Difference]: Finished difference Result 838 states and 3397 transitions. [2021-06-05 06:07:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:07:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:59,917 INFO L225 Difference]: With dead ends: 838 [2021-06-05 06:07:59,918 INFO L226 Difference]: Without dead ends: 829 [2021-06-05 06:07:59,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:07:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-06-05 06:07:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2021-06-05 06:07:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.125316455696202) internal successors, (3259), 790 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3259 transitions. [2021-06-05 06:07:59,927 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3259 transitions. Word has length 25 [2021-06-05 06:07:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:59,927 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3259 transitions. [2021-06-05 06:07:59,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:07:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3259 transitions. [2021-06-05 06:07:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:07:59,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:59,928 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:00,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 06:08:00,128 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1303784532, now seen corresponding path program 58 times [2021-06-05 06:08:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500709270] [2021-06-05 06:08:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:00,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:00,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500709270] [2021-06-05 06:08:00,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500709270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282118864] [2021-06-05 06:08:00,309 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 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 06:08:00,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:00,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:08:00,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:00,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282118864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:00,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:00,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:00,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174882662] [2021-06-05 06:08:00,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:00,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:00,662 INFO L87 Difference]: Start difference. First operand 791 states and 3259 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:00,857 INFO L93 Difference]: Finished difference Result 828 states and 3368 transitions. [2021-06-05 06:08:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:00,858 INFO L225 Difference]: With dead ends: 828 [2021-06-05 06:08:00,858 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 06:08:00,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 502.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:08:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 06:08:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 785. [2021-06-05 06:08:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 4.135204081632653) internal successors, (3242), 784 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 3242 transitions. [2021-06-05 06:08:00,867 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 3242 transitions. Word has length 25 [2021-06-05 06:08:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:00,867 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 3242 transitions. [2021-06-05 06:08:00,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 3242 transitions. [2021-06-05 06:08:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:00,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:00,869 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:01,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:01,069 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1856262014, now seen corresponding path program 59 times [2021-06-05 06:08:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:01,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285520059] [2021-06-05 06:08:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:01,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285520059] [2021-06-05 06:08:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285520059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9784415] [2021-06-05 06:08:01,155 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 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 06:08:01,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:08:01,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:08:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:01,318 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 7 treesize of output 3 [2021-06-05 06:08:01,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:01,321 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 7 treesize of output 3 [2021-06-05 06:08:01,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:01,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:01,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:01,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-05 06:08:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:01,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9784415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:01,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:01,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:08:01,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102550850] [2021-06-05 06:08:01,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:08:01,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:01,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:08:01,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:08:01,579 INFO L87 Difference]: Start difference. First operand 785 states and 3242 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 06:08:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:01,831 INFO L93 Difference]: Finished difference Result 1456 states and 5972 transitions. [2021-06-05 06:08:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:01,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-06-05 06:08:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:01,834 INFO L225 Difference]: With dead ends: 1456 [2021-06-05 06:08:01,834 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 06:08:01,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 06:08:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1013. [2021-06-05 06:08:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 4.450592885375494) internal successors, (4504), 1012 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 4504 transitions. [2021-06-05 06:08:01,848 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 4504 transitions. Word has length 25 [2021-06-05 06:08:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:01,848 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 4504 transitions. [2021-06-05 06:08:01,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 06:08:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 4504 transitions. [2021-06-05 06:08:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:01,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:01,849 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:02,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:02,065 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1459349340, now seen corresponding path program 60 times [2021-06-05 06:08:02,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:02,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956944646] [2021-06-05 06:08:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:02,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:02,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956944646] [2021-06-05 06:08:02,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956944646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:02,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136267093] [2021-06-05 06:08:02,272 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 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 06:08:02,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:02,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:02,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:08:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:02,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136267093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:02,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:02,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:02,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017314577] [2021-06-05 06:08:02,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:02,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:02,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:02,727 INFO L87 Difference]: Start difference. First operand 1013 states and 4504 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:03,006 INFO L93 Difference]: Finished difference Result 1046 states and 4594 transitions. [2021-06-05 06:08:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:03,008 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 06:08:03,008 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 06:08:03,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 06:08:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2021-06-05 06:08:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 4.439646712463199) internal successors, (4524), 1019 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 4524 transitions. [2021-06-05 06:08:03,021 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 4524 transitions. Word has length 25 [2021-06-05 06:08:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:03,021 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 4524 transitions. [2021-06-05 06:08:03,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 4524 transitions. [2021-06-05 06:08:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:03,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:03,022 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:03,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 06:08:03,229 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1035038104, now seen corresponding path program 61 times [2021-06-05 06:08:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:03,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568946233] [2021-06-05 06:08:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:03,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:03,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568946233] [2021-06-05 06:08:03,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568946233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:03,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094537688] [2021-06-05 06:08:03,350 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 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 06:08:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:08:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:03,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094537688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:03,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:03,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:03,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110515063] [2021-06-05 06:08:03,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:03,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:03,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:03,857 INFO L87 Difference]: Start difference. First operand 1020 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:04,228 INFO L93 Difference]: Finished difference Result 1059 states and 4642 transitions. [2021-06-05 06:08:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:04,230 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 06:08:04,230 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 06:08:04,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 718.1ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 06:08:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1023. [2021-06-05 06:08:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 4.448140900195694) internal successors, (4546), 1022 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 4546 transitions. [2021-06-05 06:08:04,242 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 4546 transitions. Word has length 25 [2021-06-05 06:08:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:04,242 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 4546 transitions. [2021-06-05 06:08:04,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 4546 transitions. [2021-06-05 06:08:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:04,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:04,244 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:04,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:04,444 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 190066652, now seen corresponding path program 62 times [2021-06-05 06:08:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:04,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027720651] [2021-06-05 06:08:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:04,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:04,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027720651] [2021-06-05 06:08:04,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027720651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:04,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134797975] [2021-06-05 06:08:04,629 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 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 06:08:04,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:04,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:08:04,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:05,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134797975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:05,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:05,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:05,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11929781] [2021-06-05 06:08:05,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:05,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:05,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:05,204 INFO L87 Difference]: Start difference. First operand 1023 states and 4546 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:05,480 INFO L93 Difference]: Finished difference Result 1064 states and 4663 transitions. [2021-06-05 06:08:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:05,482 INFO L225 Difference]: With dead ends: 1064 [2021-06-05 06:08:05,482 INFO L226 Difference]: Without dead ends: 1055 [2021-06-05 06:08:05,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-05 06:08:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-06-05 06:08:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 4.457677165354331) internal successors, (4529), 1016 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 4529 transitions. [2021-06-05 06:08:05,495 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 4529 transitions. Word has length 25 [2021-06-05 06:08:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:05,495 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 4529 transitions. [2021-06-05 06:08:05,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 4529 transitions. [2021-06-05 06:08:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:05,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:05,496 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:05,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:05,697 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1860740126, now seen corresponding path program 63 times [2021-06-05 06:08:05,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:05,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433993026] [2021-06-05 06:08:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:05,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433993026] [2021-06-05 06:08:05,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433993026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151053256] [2021-06-05 06:08:05,851 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 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 06:08:05,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:08:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:08:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:06,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151053256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:06,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:06,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:06,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426843527] [2021-06-05 06:08:06,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:06,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:06,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:06,446 INFO L87 Difference]: Start difference. First operand 1017 states and 4529 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:06,943 INFO L93 Difference]: Finished difference Result 1054 states and 4614 transitions. [2021-06-05 06:08:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:06,945 INFO L225 Difference]: With dead ends: 1054 [2021-06-05 06:08:06,945 INFO L226 Difference]: Without dead ends: 1041 [2021-06-05 06:08:06,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:08:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-05 06:08:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1011. [2021-06-05 06:08:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 4.461386138613862) internal successors, (4506), 1010 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 4506 transitions. [2021-06-05 06:08:06,958 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 4506 transitions. Word has length 25 [2021-06-05 06:08:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:06,958 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 4506 transitions. [2021-06-05 06:08:06,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 4506 transitions. [2021-06-05 06:08:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:06,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:06,959 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:07,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 06:08:07,160 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1856073988, now seen corresponding path program 64 times [2021-06-05 06:08:07,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:07,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734248030] [2021-06-05 06:08:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:07,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:07,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734248030] [2021-06-05 06:08:07,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734248030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:07,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27962859] [2021-06-05 06:08:07,277 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 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 06:08:07,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:07,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:08:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:07,430 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 7 treesize of output 3 [2021-06-05 06:08:07,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:07,434 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 7 treesize of output 3 [2021-06-05 06:08:07,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:07,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:07,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:07,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 06:08:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27962859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:07,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:07,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-06-05 06:08:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916581033] [2021-06-05 06:08:07,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:08:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:08:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:08:07,592 INFO L87 Difference]: Start difference. First operand 1011 states and 4506 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:07,861 INFO L93 Difference]: Finished difference Result 1144 states and 4731 transitions. [2021-06-05 06:08:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:08:07,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:07,863 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 06:08:07,863 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 06:08:07,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 06:08:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 976. [2021-06-05 06:08:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 4.441025641025641) internal successors, (4330), 975 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4330 transitions. [2021-06-05 06:08:07,875 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4330 transitions. Word has length 25 [2021-06-05 06:08:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:07,875 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 4330 transitions. [2021-06-05 06:08:07,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4330 transitions. [2021-06-05 06:08:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:07,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:07,877 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:08,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 06:08:08,077 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash 532128648, now seen corresponding path program 65 times [2021-06-05 06:08:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:08,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056922097] [2021-06-05 06:08:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:08,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056922097] [2021-06-05 06:08:08,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056922097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812038965] [2021-06-05 06:08:08,242 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 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 06:08:08,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:08:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:08,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812038965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:08,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:08,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:08,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875103499] [2021-06-05 06:08:08,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:08,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:08,799 INFO L87 Difference]: Start difference. First operand 976 states and 4330 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:09,245 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-06-05 06:08:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:09,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:09,247 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 06:08:09,247 INFO L226 Difference]: Without dead ends: 1024 [2021-06-05 06:08:09,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 850.0ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:08:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-05 06:08:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 980. [2021-06-05 06:08:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 4.435137895812053) internal successors, (4342), 979 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 4342 transitions. [2021-06-05 06:08:09,259 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 4342 transitions. Word has length 25 [2021-06-05 06:08:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:09,259 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 4342 transitions. [2021-06-05 06:08:09,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 4342 transitions. [2021-06-05 06:08:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:09,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:09,260 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:09,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 06:08:09,461 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash -353669632, now seen corresponding path program 66 times [2021-06-05 06:08:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:09,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143326381] [2021-06-05 06:08:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:09,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143326381] [2021-06-05 06:08:09,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143326381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46070522] [2021-06-05 06:08:09,581 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 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 06:08:09,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:08:09,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46070522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:10,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:10,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17656250] [2021-06-05 06:08:10,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:10,173 INFO L87 Difference]: Start difference. First operand 980 states and 4342 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:10,434 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-06-05 06:08:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:10,436 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 06:08:10,436 INFO L226 Difference]: Without dead ends: 1024 [2021-06-05 06:08:10,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 683.5ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-05 06:08:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 974. [2021-06-05 06:08:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-06-05 06:08:10,449 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-06-05 06:08:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:10,449 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-06-05 06:08:10,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-06-05 06:08:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:10,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:10,450 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:10,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:10,665 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 49401092, now seen corresponding path program 67 times [2021-06-05 06:08:10,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:10,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838013677] [2021-06-05 06:08:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:10,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838013677] [2021-06-05 06:08:10,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838013677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335776079] [2021-06-05 06:08:10,807 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 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 06:08:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:08:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:11,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335776079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:11,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:11,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:11,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727227284] [2021-06-05 06:08:11,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:11,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:11,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:11,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:11,182 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:11,537 INFO L93 Difference]: Finished difference Result 1017 states and 4451 transitions. [2021-06-05 06:08:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:11,539 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 06:08:11,539 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 06:08:11,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 06:08:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 974. [2021-06-05 06:08:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-06-05 06:08:11,550 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-06-05 06:08:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:11,550 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-06-05 06:08:11,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-06-05 06:08:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:11,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:11,552 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:11,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:11,752 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash -234168990, now seen corresponding path program 68 times [2021-06-05 06:08:11,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:11,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436270204] [2021-06-05 06:08:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:11,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436270204] [2021-06-05 06:08:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436270204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077161465] [2021-06-05 06:08:11,816 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 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 06:08:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:08:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:12,101 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 7 treesize of output 3 [2021-06-05 06:08:12,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:12,104 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 7 treesize of output 3 [2021-06-05 06:08:12,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:12,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:12,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:12,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-05 06:08:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:12,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077161465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:12,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:12,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 06:08:12,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711967647] [2021-06-05 06:08:12,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:08:12,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:12,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:08:12,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:08:12,253 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:14,553 INFO L93 Difference]: Finished difference Result 2052 states and 8564 transitions. [2021-06-05 06:08:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:08:14,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:14,557 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 06:08:14,557 INFO L226 Difference]: Without dead ends: 2008 [2021-06-05 06:08:14,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:08:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-05 06:08:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1253. [2021-06-05 06:08:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 4.634984025559105) internal successors, (5803), 1252 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 5803 transitions. [2021-06-05 06:08:14,575 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 5803 transitions. Word has length 25 [2021-06-05 06:08:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:14,576 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 5803 transitions. [2021-06-05 06:08:14,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 5803 transitions. [2021-06-05 06:08:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:14,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:14,577 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:14,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 06:08:14,778 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1258882914, now seen corresponding path program 69 times [2021-06-05 06:08:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:14,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183328765] [2021-06-05 06:08:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:14,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:14,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183328765] [2021-06-05 06:08:14,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183328765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:14,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648970750] [2021-06-05 06:08:14,931 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 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 06:08:14,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:08:14,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648970750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:15,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:15,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:15,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482435119] [2021-06-05 06:08:15,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:15,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:15,385 INFO L87 Difference]: Start difference. First operand 1253 states and 5803 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:15,645 INFO L93 Difference]: Finished difference Result 1300 states and 5927 transitions. [2021-06-05 06:08:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:15,647 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 06:08:15,647 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 06:08:15,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 06:08:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1257. [2021-06-05 06:08:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 4.629777070063694) internal successors, (5815), 1256 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 5815 transitions. [2021-06-05 06:08:15,662 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 5815 transitions. Word has length 25 [2021-06-05 06:08:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:15,662 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 5815 transitions. [2021-06-05 06:08:15,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 5815 transitions. [2021-06-05 06:08:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:15,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:15,664 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:15,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:15,864 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:15,864 INFO L82 PathProgramCache]: Analyzing trace with hash 338525918, now seen corresponding path program 70 times [2021-06-05 06:08:15,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:15,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823212122] [2021-06-05 06:08:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:15,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823212122] [2021-06-05 06:08:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823212122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210099174] [2021-06-05 06:08:15,952 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 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 06:08:15,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:08:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:16,152 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 7 treesize of output 3 [2021-06-05 06:08:16,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:16,155 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 7 treesize of output 3 [2021-06-05 06:08:16,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:16,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:16,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:16,180 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 06:08:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210099174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:16,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:16,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 06:08:16,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58633605] [2021-06-05 06:08:16,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:08:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:08:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:08:16,305 INFO L87 Difference]: Start difference. First operand 1257 states and 5815 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 06:08:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:16,571 INFO L93 Difference]: Finished difference Result 1292 states and 5884 transitions. [2021-06-05 06:08:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:08:16,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-06-05 06:08:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:16,573 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 06:08:16,573 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 06:08:16,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:08:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 06:08:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2021-06-05 06:08:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 4.6256) internal successors, (5782), 1250 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 5782 transitions. [2021-06-05 06:08:16,588 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 5782 transitions. Word has length 25 [2021-06-05 06:08:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:16,589 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 5782 transitions. [2021-06-05 06:08:16,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 06:08:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 5782 transitions. [2021-06-05 06:08:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:16,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:16,590 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:16,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 06:08:16,791 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash 477709660, now seen corresponding path program 71 times [2021-06-05 06:08:16,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:16,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4304899] [2021-06-05 06:08:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:16,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4304899] [2021-06-05 06:08:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4304899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964978596] [2021-06-05 06:08:16,956 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 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 06:08:16,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:08:16,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:17,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964978596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:17,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:17,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3579138] [2021-06-05 06:08:17,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:17,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:17,413 INFO L87 Difference]: Start difference. First operand 1251 states and 5782 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:17,675 INFO L93 Difference]: Finished difference Result 1290 states and 5886 transitions. [2021-06-05 06:08:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:17,678 INFO L225 Difference]: With dead ends: 1290 [2021-06-05 06:08:17,678 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 06:08:17,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 612.5ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 06:08:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1249. [2021-06-05 06:08:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 4.6306089743589745) internal successors, (5779), 1248 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 5779 transitions. [2021-06-05 06:08:17,693 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 5779 transitions. Word has length 25 [2021-06-05 06:08:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:17,693 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 5779 transitions. [2021-06-05 06:08:17,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 5779 transitions. [2021-06-05 06:08:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:17,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:17,695 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:17,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:17,895 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -367261792, now seen corresponding path program 72 times [2021-06-05 06:08:17,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:17,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297532634] [2021-06-05 06:08:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:18,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:18,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297532634] [2021-06-05 06:08:18,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297532634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:18,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077243385] [2021-06-05 06:08:18,020 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 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 06:08:18,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:08:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:18,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077243385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:18,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:18,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:18,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875788271] [2021-06-05 06:08:18,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:18,543 INFO L87 Difference]: Start difference. First operand 1249 states and 5779 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:18,873 INFO L93 Difference]: Finished difference Result 1291 states and 5884 transitions. [2021-06-05 06:08:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 06:08:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:18,875 INFO L225 Difference]: With dead ends: 1291 [2021-06-05 06:08:18,875 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 06:08:18,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 639.9ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 06:08:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1240. [2021-06-05 06:08:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 4.642453591606134) internal successors, (5752), 1239 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 5752 transitions. [2021-06-05 06:08:18,891 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 5752 transitions. Word has length 25 [2021-06-05 06:08:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:18,891 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 5752 transitions. [2021-06-05 06:08:18,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 5752 transitions. [2021-06-05 06:08:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:18,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:18,892 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:19,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 06:08:19,093 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1601944802, now seen corresponding path program 73 times [2021-06-05 06:08:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:19,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410663775] [2021-06-05 06:08:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:19,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:19,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410663775] [2021-06-05 06:08:19,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410663775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:19,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086082557] [2021-06-05 06:08:19,222 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 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 06:08:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:19,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086082557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:19,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:19,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933226628] [2021-06-05 06:08:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:19,726 INFO L87 Difference]: Start difference. First operand 1240 states and 5752 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:20,199 INFO L93 Difference]: Finished difference Result 1276 states and 5860 transitions. [2021-06-05 06:08:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:20,202 INFO L225 Difference]: With dead ends: 1276 [2021-06-05 06:08:20,202 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 06:08:20,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:08:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 06:08:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1229. [2021-06-05 06:08:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.662866449511401) internal successors, (5726), 1228 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5726 transitions. [2021-06-05 06:08:20,225 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5726 transitions. Word has length 25 [2021-06-05 06:08:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:20,225 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 5726 transitions. [2021-06-05 06:08:20,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5726 transitions. [2021-06-05 06:08:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:20,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:20,227 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:20,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 06:08:20,429 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash 790923972, now seen corresponding path program 74 times [2021-06-05 06:08:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:20,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459986296] [2021-06-05 06:08:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:20,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:20,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459986296] [2021-06-05 06:08:20,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459986296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:20,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840269518] [2021-06-05 06:08:20,581 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 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 06:08:20,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:08:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840269518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:21,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:21,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:21,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245448970] [2021-06-05 06:08:21,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:21,176 INFO L87 Difference]: Start difference. First operand 1229 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:21,593 INFO L93 Difference]: Finished difference Result 1274 states and 5850 transitions. [2021-06-05 06:08:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:21,595 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 06:08:21,595 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 06:08:21,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 845.8ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 06:08:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1221. [2021-06-05 06:08:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 4.677049180327868) internal successors, (5706), 1220 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 5706 transitions. [2021-06-05 06:08:21,626 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 5706 transitions. Word has length 25 [2021-06-05 06:08:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:21,626 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 5706 transitions. [2021-06-05 06:08:21,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 5706 transitions. [2021-06-05 06:08:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:08:21,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:21,628 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:21,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 06:08:21,841 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash -94874308, now seen corresponding path program 75 times [2021-06-05 06:08:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:21,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152405001] [2021-06-05 06:08:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:21,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152405001] [2021-06-05 06:08:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152405001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678296922] [2021-06-05 06:08:21,976 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 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 06:08:22,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:08:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:22,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678296922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:22,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:22,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 06:08:22,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492251719] [2021-06-05 06:08:22,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:22,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:22,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:22,588 INFO L87 Difference]: Start difference. First operand 1221 states and 5706 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:23,037 INFO L93 Difference]: Finished difference Result 1266 states and 5830 transitions. [2021-06-05 06:08:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-06-05 06:08:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:23,040 INFO L225 Difference]: With dead ends: 1266 [2021-06-05 06:08:23,040 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 06:08:23,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 06:08:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1203. [2021-06-05 06:08:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 4.70216306156406) internal successors, (5652), 1202 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 5652 transitions. [2021-06-05 06:08:23,066 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 5652 transitions. Word has length 25 [2021-06-05 06:08:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:23,066 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 5652 transitions. [2021-06-05 06:08:23,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 06:08:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 5652 transitions. [2021-06-05 06:08:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:23,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:23,068 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:23,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:23,268 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -945147981, now seen corresponding path program 76 times [2021-06-05 06:08:23,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:23,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806116370] [2021-06-05 06:08:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:23,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:23,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806116370] [2021-06-05 06:08:23,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806116370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:23,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336976418] [2021-06-05 06:08:23,389 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 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 06:08:23,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:23,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:08:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:23,616 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 7 treesize of output 3 [2021-06-05 06:08:23,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:23,620 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 7 treesize of output 3 [2021-06-05 06:08:23,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:23,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:23,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:23,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 06:08:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:23,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336976418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:23,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:23,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 06:08:23,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240321375] [2021-06-05 06:08:23,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:23,741 INFO L87 Difference]: Start difference. First operand 1203 states and 5652 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 06:08:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:24,012 INFO L93 Difference]: Finished difference Result 1400 states and 6258 transitions. [2021-06-05 06:08:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:24,012 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 26 [2021-06-05 06:08:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:24,015 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 06:08:24,015 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 06:08:24,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 06:08:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1239. [2021-06-05 06:08:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.676090468497577) internal successors, (5789), 1238 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5789 transitions. [2021-06-05 06:08:24,031 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5789 transitions. Word has length 26 [2021-06-05 06:08:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:24,031 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5789 transitions. [2021-06-05 06:08:24,031 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 06:08:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5789 transitions. [2021-06-05 06:08:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:24,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:24,033 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:24,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:24,245 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1969861905, now seen corresponding path program 77 times [2021-06-05 06:08:24,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:24,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846461940] [2021-06-05 06:08:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:24,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:24,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846461940] [2021-06-05 06:08:24,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846461940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:24,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844904623] [2021-06-05 06:08:24,425 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 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 06:08:24,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:08:24,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:24,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:08:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:25,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844904623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:25,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:25,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131902352] [2021-06-05 06:08:25,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:25,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:25,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:25,018 INFO L87 Difference]: Start difference. First operand 1239 states and 5789 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:25,214 INFO L93 Difference]: Finished difference Result 1286 states and 5928 transitions. [2021-06-05 06:08:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:25,216 INFO L225 Difference]: With dead ends: 1286 [2021-06-05 06:08:25,216 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 06:08:25,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 665.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 06:08:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1246. [2021-06-05 06:08:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 4.674698795180723) internal successors, (5820), 1245 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 5820 transitions. [2021-06-05 06:08:25,232 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 5820 transitions. Word has length 26 [2021-06-05 06:08:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:25,232 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 5820 transitions. [2021-06-05 06:08:25,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 5820 transitions. [2021-06-05 06:08:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:25,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:25,234 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:25,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:25,434 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:25,434 INFO L82 PathProgramCache]: Analyzing trace with hash -615589583, now seen corresponding path program 78 times [2021-06-05 06:08:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:25,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835410472] [2021-06-05 06:08:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:25,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:25,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835410472] [2021-06-05 06:08:25,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835410472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:25,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595854177] [2021-06-05 06:08:25,625 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 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 06:08:25,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:25,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:08:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:25,889 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 7 treesize of output 3 [2021-06-05 06:08:25,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:25,894 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 7 treesize of output 3 [2021-06-05 06:08:25,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:25,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:25,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:25,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-05 06:08:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:26,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595854177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:26,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:26,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:08:26,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359388240] [2021-06-05 06:08:26,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:26,047 INFO L87 Difference]: Start difference. First operand 1246 states and 5820 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:26,527 INFO L93 Difference]: Finished difference Result 1353 states and 6064 transitions. [2021-06-05 06:08:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:26,529 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 06:08:26,529 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 06:08:26,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 727.2ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 06:08:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1247. [2021-06-05 06:08:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 4.657303370786517) internal successors, (5803), 1246 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 5803 transitions. [2021-06-05 06:08:26,545 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 5803 transitions. Word has length 26 [2021-06-05 06:08:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:26,546 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 5803 transitions. [2021-06-05 06:08:26,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 5803 transitions. [2021-06-05 06:08:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:26,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:26,547 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:26,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:26,748 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 219339981, now seen corresponding path program 79 times [2021-06-05 06:08:26,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:26,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149669360] [2021-06-05 06:08:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:26,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149669360] [2021-06-05 06:08:26,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149669360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634656087] [2021-06-05 06:08:26,860 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 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 06:08:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:08:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:27,082 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 7 treesize of output 3 [2021-06-05 06:08:27,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:27,085 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 7 treesize of output 3 [2021-06-05 06:08:27,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:27,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:27,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:27,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 06:08:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:08:27,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634656087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:27,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:27,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 06:08:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758822704] [2021-06-05 06:08:27,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:27,204 INFO L87 Difference]: Start difference. First operand 1247 states and 5803 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 06:08:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:27,582 INFO L93 Difference]: Finished difference Result 2674 states and 11664 transitions. [2021-06-05 06:08:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:08:27,583 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 26 [2021-06-05 06:08:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:27,587 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 06:08:27,587 INFO L226 Difference]: Without dead ends: 2633 [2021-06-05 06:08:27,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:08:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-05 06:08:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1458. [2021-06-05 06:08:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 4.881949210706932) internal successors, (7113), 1457 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 7113 transitions. [2021-06-05 06:08:27,613 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 7113 transitions. Word has length 26 [2021-06-05 06:08:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:27,613 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 7113 transitions. [2021-06-05 06:08:27,613 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 06:08:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 7113 transitions. [2021-06-05 06:08:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:27,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:27,615 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:27,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 06:08:27,816 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash -805373943, now seen corresponding path program 80 times [2021-06-05 06:08:27,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:27,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848807057] [2021-06-05 06:08:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:28,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:28,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848807057] [2021-06-05 06:08:28,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848807057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:28,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686000058] [2021-06-05 06:08:28,008 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 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 06:08:28,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:28,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686000058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:28,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:28,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:28,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335421775] [2021-06-05 06:08:28,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:28,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:28,552 INFO L87 Difference]: Start difference. First operand 1458 states and 7113 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:29,098 INFO L93 Difference]: Finished difference Result 1507 states and 7259 transitions. [2021-06-05 06:08:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:08:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:29,101 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 06:08:29,101 INFO L226 Difference]: Without dead ends: 1499 [2021-06-05 06:08:29,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:08:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-06-05 06:08:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1460. [2021-06-05 06:08:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 4.885538039753255) internal successors, (7128), 1459 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7128 transitions. [2021-06-05 06:08:29,120 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7128 transitions. Word has length 26 [2021-06-05 06:08:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:29,120 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 7128 transitions. [2021-06-05 06:08:29,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7128 transitions. [2021-06-05 06:08:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:29,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:29,122 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:29,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 06:08:29,322 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1799650449, now seen corresponding path program 81 times [2021-06-05 06:08:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:29,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803080983] [2021-06-05 06:08:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:29,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:29,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803080983] [2021-06-05 06:08:29,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803080983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:29,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889962353] [2021-06-05 06:08:29,467 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 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 06:08:29,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:08:29,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:08:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:30,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889962353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:30,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:30,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136313900] [2021-06-05 06:08:30,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:30,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:30,092 INFO L87 Difference]: Start difference. First operand 1460 states and 7128 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:30,545 INFO L93 Difference]: Finished difference Result 1520 states and 7319 transitions. [2021-06-05 06:08:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:30,548 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 06:08:30,548 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 06:08:30,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:08:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 06:08:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1465. [2021-06-05 06:08:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 4.8756830601092895) internal successors, (7138), 1464 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7138 transitions. [2021-06-05 06:08:30,566 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7138 transitions. Word has length 26 [2021-06-05 06:08:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:30,566 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7138 transitions. [2021-06-05 06:08:30,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7138 transitions. [2021-06-05 06:08:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:30,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:30,569 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:30,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:30,784 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1153082439, now seen corresponding path program 82 times [2021-06-05 06:08:30,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:30,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037801139] [2021-06-05 06:08:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:30,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037801139] [2021-06-05 06:08:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037801139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170254594] [2021-06-05 06:08:30,858 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 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 06:08:30,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:30,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:08:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:31,118 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 7 treesize of output 3 [2021-06-05 06:08:31,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:31,122 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 7 treesize of output 3 [2021-06-05 06:08:31,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:31,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:31,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:31,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:81 [2021-06-05 06:08:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170254594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:31,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:31,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 06:08:31,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026355959] [2021-06-05 06:08:31,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:08:31,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:31,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:08:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:08:31,241 INFO L87 Difference]: Start difference. First operand 1465 states and 7138 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:34,014 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 06:08:40,293 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 06:08:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:42,397 INFO L93 Difference]: Finished difference Result 1797 states and 8266 transitions. [2021-06-05 06:08:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:08:42,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:42,401 INFO L225 Difference]: With dead ends: 1797 [2021-06-05 06:08:42,401 INFO L226 Difference]: Without dead ends: 1781 [2021-06-05 06:08:42,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 7099.0ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-06-05 06:08:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1513. [2021-06-05 06:08:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 4.866402116402116) internal successors, (7358), 1512 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 7358 transitions. [2021-06-05 06:08:42,421 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 7358 transitions. Word has length 26 [2021-06-05 06:08:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:42,421 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 7358 transitions. [2021-06-05 06:08:42,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 7358 transitions. [2021-06-05 06:08:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:42,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:42,424 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:42,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 06:08:42,637 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 532556407, now seen corresponding path program 83 times [2021-06-05 06:08:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:42,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557147908] [2021-06-05 06:08:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:42,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:42,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557147908] [2021-06-05 06:08:42,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557147908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116260918] [2021-06-05 06:08:42,746 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 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 06:08:42,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:08:42,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:42,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:08:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:43,079 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 7 treesize of output 3 [2021-06-05 06:08:43,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:43,084 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 7 treesize of output 3 [2021-06-05 06:08:43,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:43,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:43,161 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 7 treesize of output 3 [2021-06-05 06:08:43,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:43,165 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 7 treesize of output 3 [2021-06-05 06:08:43,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:43,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:43,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 06:08:43,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-05 06:08:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116260918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:08:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981085311] [2021-06-05 06:08:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:43,483 INFO L87 Difference]: Start difference. First operand 1513 states and 7358 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:43,799 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-06-05 06:08:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:43,820 INFO L93 Difference]: Finished difference Result 1848 states and 7788 transitions. [2021-06-05 06:08:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:43,823 INFO L225 Difference]: With dead ends: 1848 [2021-06-05 06:08:43,823 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 06:08:43,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 06:08:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1232. [2021-06-05 06:08:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.560519902518278) internal successors, (5614), 1231 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5614 transitions. [2021-06-05 06:08:43,841 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5614 transitions. Word has length 26 [2021-06-05 06:08:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:43,841 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5614 transitions. [2021-06-05 06:08:43,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5614 transitions. [2021-06-05 06:08:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:43,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:43,843 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:44,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:44,043 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:44,044 INFO L82 PathProgramCache]: Analyzing trace with hash -492157517, now seen corresponding path program 84 times [2021-06-05 06:08:44,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:44,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197155889] [2021-06-05 06:08:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:44,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:44,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197155889] [2021-06-05 06:08:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197155889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:44,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956264392] [2021-06-05 06:08:44,207 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 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 06:08:44,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956264392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:44,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:44,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771531749] [2021-06-05 06:08:44,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:44,669 INFO L87 Difference]: Start difference. First operand 1232 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:44,911 INFO L93 Difference]: Finished difference Result 1287 states and 5773 transitions. [2021-06-05 06:08:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:44,914 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 06:08:44,914 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 06:08:44,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 06:08:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1242. [2021-06-05 06:08:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 4.556809024979855) internal successors, (5655), 1241 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5655 transitions. [2021-06-05 06:08:44,928 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5655 transitions. Word has length 26 [2021-06-05 06:08:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:44,928 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 5655 transitions. [2021-06-05 06:08:44,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5655 transitions. [2021-06-05 06:08:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:44,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:44,930 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:45,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 06:08:45,132 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1587344779, now seen corresponding path program 85 times [2021-06-05 06:08:45,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:45,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669531645] [2021-06-05 06:08:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:45,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669531645] [2021-06-05 06:08:45,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669531645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:45,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411068700] [2021-06-05 06:08:45,251 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 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 06:08:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:08:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:45,492 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 7 treesize of output 3 [2021-06-05 06:08:45,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:45,495 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 7 treesize of output 3 [2021-06-05 06:08:45,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:45,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:45,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:45,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 06:08:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:45,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411068700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:45,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:45,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 06:08:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747280468] [2021-06-05 06:08:45,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:45,610 INFO L87 Difference]: Start difference. First operand 1242 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:45,961 INFO L93 Difference]: Finished difference Result 1370 states and 6000 transitions. [2021-06-05 06:08:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:08:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:45,963 INFO L225 Difference]: With dead ends: 1370 [2021-06-05 06:08:45,963 INFO L226 Difference]: Without dead ends: 1358 [2021-06-05 06:08:45,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:08:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-06-05 06:08:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1255. [2021-06-05 06:08:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 4.54066985645933) internal successors, (5694), 1254 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 5694 transitions. [2021-06-05 06:08:45,978 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 5694 transitions. Word has length 26 [2021-06-05 06:08:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:45,978 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 5694 transitions. [2021-06-05 06:08:45,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 5694 transitions. [2021-06-05 06:08:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:45,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:45,980 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:46,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:46,185 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2032815699, now seen corresponding path program 86 times [2021-06-05 06:08:46,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023064983] [2021-06-05 06:08:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:46,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023064983] [2021-06-05 06:08:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023064983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213624132] [2021-06-05 06:08:46,348 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 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 06:08:46,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:46,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213624132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:46,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:46,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510571909] [2021-06-05 06:08:46,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:46,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:46,863 INFO L87 Difference]: Start difference. First operand 1255 states and 5694 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:47,152 INFO L93 Difference]: Finished difference Result 1289 states and 5778 transitions. [2021-06-05 06:08:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:08:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:47,154 INFO L225 Difference]: With dead ends: 1289 [2021-06-05 06:08:47,154 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 06:08:47,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 06:08:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1252. [2021-06-05 06:08:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 4.545163868904876) internal successors, (5686), 1251 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 5686 transitions. [2021-06-05 06:08:47,170 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 5686 transitions. Word has length 26 [2021-06-05 06:08:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:47,170 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 5686 transitions. [2021-06-05 06:08:47,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 5686 transitions. [2021-06-05 06:08:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:47,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:47,172 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:47,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 06:08:47,372 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1608504463, now seen corresponding path program 87 times [2021-06-05 06:08:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:47,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918739279] [2021-06-05 06:08:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:47,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:47,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918739279] [2021-06-05 06:08:47,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918739279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:47,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271317931] [2021-06-05 06:08:47,555 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 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 06:08:47,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:08:47,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271317931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:48,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:48,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:48,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666133027] [2021-06-05 06:08:48,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:48,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:48,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:48,193 INFO L87 Difference]: Start difference. First operand 1252 states and 5686 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:48,508 INFO L93 Difference]: Finished difference Result 1295 states and 5809 transitions. [2021-06-05 06:08:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:48,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:08:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:48,510 INFO L225 Difference]: With dead ends: 1295 [2021-06-05 06:08:48,510 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 06:08:48,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 808.8ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 06:08:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1254. [2021-06-05 06:08:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 4.5474860335195535) internal successors, (5698), 1253 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 5698 transitions. [2021-06-05 06:08:48,525 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 5698 transitions. Word has length 26 [2021-06-05 06:08:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:48,525 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 5698 transitions. [2021-06-05 06:08:48,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 5698 transitions. [2021-06-05 06:08:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:48,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:48,527 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:48,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:48,727 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash 842661457, now seen corresponding path program 88 times [2021-06-05 06:08:48,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:48,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523604935] [2021-06-05 06:08:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:48,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:48,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523604935] [2021-06-05 06:08:48,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523604935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:48,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406497345] [2021-06-05 06:08:48,884 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 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 06:08:48,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:08:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406497345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:49,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:49,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:49,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011629403] [2021-06-05 06:08:49,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:49,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:49,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:49,398 INFO L87 Difference]: Start difference. First operand 1254 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:49,638 INFO L93 Difference]: Finished difference Result 1301 states and 5846 transitions. [2021-06-05 06:08:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:49,640 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 06:08:49,640 INFO L226 Difference]: Without dead ends: 1296 [2021-06-05 06:08:49,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 626.1ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-05 06:08:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1250. [2021-06-05 06:08:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.551641313050441) internal successors, (5685), 1249 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 5685 transitions. [2021-06-05 06:08:49,655 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 5685 transitions. Word has length 26 [2021-06-05 06:08:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:49,655 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 5685 transitions. [2021-06-05 06:08:49,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 5685 transitions. [2021-06-05 06:08:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:49,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:49,657 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:49,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 06:08:49,857 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1059437065, now seen corresponding path program 89 times [2021-06-05 06:08:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:49,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222184587] [2021-06-05 06:08:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:50,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222184587] [2021-06-05 06:08:50,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222184587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:50,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35609592] [2021-06-05 06:08:50,077 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 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 06:08:50,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:08:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:08:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:50,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35609592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:50,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:50,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:50,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003762413] [2021-06-05 06:08:50,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:50,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:50,609 INFO L87 Difference]: Start difference. First operand 1250 states and 5685 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:50,890 INFO L93 Difference]: Finished difference Result 1389 states and 6092 transitions. [2021-06-05 06:08:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:08:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:50,893 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 06:08:50,893 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 06:08:50,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 06:08:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1243. [2021-06-05 06:08:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 4.563607085346216) internal successors, (5668), 1242 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 5668 transitions. [2021-06-05 06:08:50,909 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 5668 transitions. Word has length 26 [2021-06-05 06:08:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:50,909 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 5668 transitions. [2021-06-05 06:08:50,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 5668 transitions. [2021-06-05 06:08:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:50,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:50,910 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:51,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 06:08:51,125 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2140342969, now seen corresponding path program 90 times [2021-06-05 06:08:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:51,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388338532] [2021-06-05 06:08:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:51,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:51,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388338532] [2021-06-05 06:08:51,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388338532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:51,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748260068] [2021-06-05 06:08:51,229 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 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 06:08:51,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:08:51,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:51,650 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 7 treesize of output 3 [2021-06-05 06:08:51,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:51,653 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 7 treesize of output 3 [2021-06-05 06:08:51,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:51,759 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 06:08:51,760 INFO L628 ElimStorePlain]: treesize reduction 14, result has 92.6 percent of original size [2021-06-05 06:08:51,763 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 7 treesize of output 3 [2021-06-05 06:08:51,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:51,767 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 7 treesize of output 3 [2021-06-05 06:08:51,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:51,822 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.3 percent of original size [2021-06-05 06:08:51,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:51,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:203, output treesize:73 [2021-06-05 06:08:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:51,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748260068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:51,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:51,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:08:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245065664] [2021-06-05 06:08:51,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:51,917 INFO L87 Difference]: Start difference. First operand 1243 states and 5668 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:52,293 INFO L93 Difference]: Finished difference Result 1300 states and 5767 transitions. [2021-06-05 06:08:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:08:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:52,295 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 06:08:52,295 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 06:08:52,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 628.7ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:08:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 06:08:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1239. [2021-06-05 06:08:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.554119547657512) internal successors, (5638), 1238 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5638 transitions. [2021-06-05 06:08:52,310 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5638 transitions. Word has length 26 [2021-06-05 06:08:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:52,310 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5638 transitions. [2021-06-05 06:08:52,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5638 transitions. [2021-06-05 06:08:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:52,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:52,312 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:52,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:52,518 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1627082575, now seen corresponding path program 91 times [2021-06-05 06:08:52,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:52,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79388110] [2021-06-05 06:08:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:52,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:52,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79388110] [2021-06-05 06:08:52,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79388110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:52,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282357528] [2021-06-05 06:08:52,632 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 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 06:08:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:52,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:08:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:52,866 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 7 treesize of output 3 [2021-06-05 06:08:52,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:52,869 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 7 treesize of output 3 [2021-06-05 06:08:52,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:52,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:52,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:52,897 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 06:08:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:52,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282357528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:52,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:52,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 06:08:52,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922126992] [2021-06-05 06:08:52,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:08:52,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:52,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:08:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:08:52,984 INFO L87 Difference]: Start difference. First operand 1239 states and 5638 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:53,208 INFO L93 Difference]: Finished difference Result 1002 states and 4294 transitions. [2021-06-05 06:08:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:08:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:53,211 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 06:08:53,211 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 06:08:53,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 06:08:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 974. [2021-06-05 06:08:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.34737923946557) internal successors, (4230), 973 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4230 transitions. [2021-06-05 06:08:53,222 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4230 transitions. Word has length 26 [2021-06-05 06:08:53,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:53,222 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4230 transitions. [2021-06-05 06:08:53,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4230 transitions. [2021-06-05 06:08:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:53,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:53,223 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:53,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:53,425 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1993077903, now seen corresponding path program 92 times [2021-06-05 06:08:53,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:53,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559130726] [2021-06-05 06:08:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:53,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:53,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559130726] [2021-06-05 06:08:53,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559130726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:53,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167687624] [2021-06-05 06:08:53,593 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 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 06:08:53,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:08:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:54,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167687624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:54,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:54,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:54,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601969594] [2021-06-05 06:08:54,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:54,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:54,214 INFO L87 Difference]: Start difference. First operand 974 states and 4230 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:54,807 INFO L93 Difference]: Finished difference Result 1025 states and 4377 transitions. [2021-06-05 06:08:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:08:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:08:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:54,809 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 06:08:54,809 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 06:08:54,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:08:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 06:08:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 986. [2021-06-05 06:08:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 4.336040609137056) internal successors, (4271), 985 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 4271 transitions. [2021-06-05 06:08:54,820 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 4271 transitions. Word has length 26 [2021-06-05 06:08:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:54,820 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 4271 transitions. [2021-06-05 06:08:54,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 4271 transitions. [2021-06-05 06:08:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:54,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:54,822 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:55,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:55,022 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:55,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1724331475, now seen corresponding path program 93 times [2021-06-05 06:08:55,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:55,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696041791] [2021-06-05 06:08:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:55,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:55,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696041791] [2021-06-05 06:08:55,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696041791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:55,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953475602] [2021-06-05 06:08:55,215 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 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 06:08:55,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:08:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:08:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:55,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953475602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:55,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:55,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:55,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795919705] [2021-06-05 06:08:55,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:55,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:55,786 INFO L87 Difference]: Start difference. First operand 986 states and 4271 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:56,067 INFO L93 Difference]: Finished difference Result 1033 states and 4401 transitions. [2021-06-05 06:08:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:08:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:08:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:56,068 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 06:08:56,068 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 06:08:56,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 06:08:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 975. [2021-06-05 06:08:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 4.354209445585216) internal successors, (4241), 974 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 4241 transitions. [2021-06-05 06:08:56,080 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 4241 transitions. Word has length 26 [2021-06-05 06:08:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:56,080 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 4241 transitions. [2021-06-05 06:08:56,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 4241 transitions. [2021-06-05 06:08:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:56,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:56,082 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:56,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 06:08:56,282 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:56,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1300020239, now seen corresponding path program 94 times [2021-06-05 06:08:56,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:56,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263287312] [2021-06-05 06:08:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:56,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:56,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263287312] [2021-06-05 06:08:56,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263287312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:56,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672010760] [2021-06-05 06:08:56,463 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 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 06:08:56,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:08:56,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:57,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672010760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:57,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:57,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:57,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456997782] [2021-06-05 06:08:57,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:57,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:57,095 INFO L87 Difference]: Start difference. First operand 975 states and 4241 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:57,408 INFO L93 Difference]: Finished difference Result 1021 states and 4369 transitions. [2021-06-05 06:08:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:57,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:08:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:57,410 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 06:08:57,410 INFO L226 Difference]: Without dead ends: 1013 [2021-06-05 06:08:57,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-05 06:08:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 974. [2021-06-05 06:08:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.362795477903392) internal successors, (4245), 973 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4245 transitions. [2021-06-05 06:08:57,421 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4245 transitions. Word has length 26 [2021-06-05 06:08:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:57,421 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4245 transitions. [2021-06-05 06:08:57,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:08:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4245 transitions. [2021-06-05 06:08:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:57,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:57,423 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:57,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 06:08:57,623 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1350944785, now seen corresponding path program 95 times [2021-06-05 06:08:57,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:57,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848024804] [2021-06-05 06:08:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:57,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848024804] [2021-06-05 06:08:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848024804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625444549] [2021-06-05 06:08:57,738 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 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 06:08:57,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:08:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:57,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:08:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:58,229 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 7 treesize of output 3 [2021-06-05 06:08:58,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:58,232 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 7 treesize of output 3 [2021-06-05 06:08:58,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:58,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:58,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:08:58,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-05 06:08:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:58,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625444549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:58,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:58,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 06:08:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153299283] [2021-06-05 06:08:58,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:08:58,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:08:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:08:58,397 INFO L87 Difference]: Start difference. First operand 974 states and 4245 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:58,467 INFO L93 Difference]: Finished difference Result 995 states and 4253 transitions. [2021-06-05 06:08:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:08:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:58,469 INFO L225 Difference]: With dead ends: 995 [2021-06-05 06:08:58,469 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 06:08:58,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:08:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 06:08:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 963. [2021-06-05 06:08:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.353430353430354) internal successors, (4188), 962 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 4188 transitions. [2021-06-05 06:08:58,480 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 4188 transitions. Word has length 26 [2021-06-05 06:08:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:58,480 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 4188 transitions. [2021-06-05 06:08:58,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 4188 transitions. [2021-06-05 06:08:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:58,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:58,482 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:58,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 06:08:58,682 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1919308587, now seen corresponding path program 96 times [2021-06-05 06:08:58,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:58,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6687315] [2021-06-05 06:08:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:58,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6687315] [2021-06-05 06:08:58,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6687315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886163598] [2021-06-05 06:08:58,837 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 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 06:08:58,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:08:58,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:59,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886163598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:59,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:59,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:08:59,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142152494] [2021-06-05 06:08:59,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:59,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:59,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:59,346 INFO L87 Difference]: Start difference. First operand 963 states and 4188 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:59,613 INFO L93 Difference]: Finished difference Result 1008 states and 4333 transitions. [2021-06-05 06:08:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:08:59,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:08:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:59,615 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 06:08:59,615 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 06:08:59,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 06:08:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 965. [2021-06-05 06:08:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 4.348547717842323) internal successors, (4192), 964 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 4192 transitions. [2021-06-05 06:08:59,626 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 4192 transitions. Word has length 26 [2021-06-05 06:08:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:59,626 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 4192 transitions. [2021-06-05 06:08:59,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 4192 transitions. [2021-06-05 06:08:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:08:59,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:59,627 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:59,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 06:08:59,828 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:59,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1211170747, now seen corresponding path program 97 times [2021-06-05 06:08:59,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:59,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65232002] [2021-06-05 06:08:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:00,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:00,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65232002] [2021-06-05 06:09:00,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65232002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:00,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980635458] [2021-06-05 06:09:00,069 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 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 06:09:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:09:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980635458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:00,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:00,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:09:00,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953305085] [2021-06-05 06:09:00,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:00,641 INFO L87 Difference]: Start difference. First operand 965 states and 4192 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:01,162 INFO L93 Difference]: Finished difference Result 1251 states and 5174 transitions. [2021-06-05 06:09:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:09:01,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:09:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:01,164 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 06:09:01,164 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 06:09:01,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:09:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 06:09:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1036. [2021-06-05 06:09:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 4.33719806763285) internal successors, (4489), 1035 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 4489 transitions. [2021-06-05 06:09:01,177 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 4489 transitions. Word has length 26 [2021-06-05 06:09:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:01,177 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 4489 transitions. [2021-06-05 06:09:01,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 4489 transitions. [2021-06-05 06:09:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:09:01,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:01,178 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:01,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 06:09:01,382 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1876399727, now seen corresponding path program 98 times [2021-06-05 06:09:01,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:01,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481603139] [2021-06-05 06:09:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:01,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:01,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481603139] [2021-06-05 06:09:01,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481603139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:01,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320907976] [2021-06-05 06:09:01,517 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 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 06:09:01,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:09:01,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:09:01,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:01,995 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 7 treesize of output 3 [2021-06-05 06:09:01,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:02,000 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 7 treesize of output 3 [2021-06-05 06:09:02,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:02,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:02,076 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 7 treesize of output 3 [2021-06-05 06:09:02,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:02,080 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 7 treesize of output 3 [2021-06-05 06:09:02,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:02,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:02,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 06:09:02,158 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-05 06:10:04,863 WARN L205 SmtUtils]: Spent 1.04 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 06:10:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:10:04,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320907976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:04,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:04,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 06:10:04,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479122949] [2021-06-05 06:10:04,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:10:04,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:04,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:10:04,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:10:04,971 INFO L87 Difference]: Start difference. First operand 1036 states and 4489 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:06,121 WARN L205 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-05 06:11:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:06,173 INFO L93 Difference]: Finished difference Result 1372 states and 5445 transitions. [2021-06-05 06:11:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:11:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:11:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:06,175 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 06:11:06,175 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 06:11:06,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 124161.0ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:11:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 06:11:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 968. [2021-06-05 06:11:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.269906928645295) internal successors, (4129), 967 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4129 transitions. [2021-06-05 06:11:06,188 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4129 transitions. Word has length 26 [2021-06-05 06:11:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:06,188 INFO L482 AbstractCegarLoop]: Abstraction has 968 states and 4129 transitions. [2021-06-05 06:11:06,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4129 transitions. [2021-06-05 06:11:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:11:06,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:06,189 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:06,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 06:11:06,390 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1393853645, now seen corresponding path program 99 times [2021-06-05 06:11:06,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:06,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22356743] [2021-06-05 06:11:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:06,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:06,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22356743] [2021-06-05 06:11:06,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22356743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:06,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835175925] [2021-06-05 06:11:06,566 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 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 06:11:06,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:11:06,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:11:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:07,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835175925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:07,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:07,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:11:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383598846] [2021-06-05 06:11:07,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:11:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:11:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:11:07,124 INFO L87 Difference]: Start difference. First operand 968 states and 4129 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:07,374 INFO L93 Difference]: Finished difference Result 1031 states and 4316 transitions. [2021-06-05 06:11:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:11:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:11:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:07,376 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 06:11:07,376 INFO L226 Difference]: Without dead ends: 1023 [2021-06-05 06:11:07,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:11:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-05 06:11:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 981. [2021-06-05 06:11:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 4.259183673469388) internal successors, (4174), 980 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 4174 transitions. [2021-06-05 06:11:07,388 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 4174 transitions. Word has length 26 [2021-06-05 06:11:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:07,388 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 4174 transitions. [2021-06-05 06:11:07,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 4174 transitions. [2021-06-05 06:11:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:11:07,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:07,389 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:07,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 06:11:07,590 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:07,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1558879243, now seen corresponding path program 100 times [2021-06-05 06:11:07,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:07,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337346834] [2021-06-05 06:11:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:07,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337346834] [2021-06-05 06:11:07,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337346834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643156856] [2021-06-05 06:11:07,731 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 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 06:11:07,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:11:07,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:11:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:07,996 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 7 treesize of output 3 [2021-06-05 06:11:07,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:08,000 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 7 treesize of output 3 [2021-06-05 06:11:08,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:08,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:08,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:11:08,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-05 06:11:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:08,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643156856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:08,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:08,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 06:11:08,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335870260] [2021-06-05 06:11:08,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:11:08,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:11:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:11:08,134 INFO L87 Difference]: Start difference. First operand 981 states and 4174 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:12,443 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 06:11:18,621 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 06:11:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:18,668 INFO L93 Difference]: Finished difference Result 1006 states and 4214 transitions. [2021-06-05 06:11:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:11:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:11:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:18,670 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 06:11:18,670 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 06:11:18,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8710.0ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:11:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 06:11:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 972. [2021-06-05 06:11:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.25643666323378) internal successors, (4133), 971 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4133 transitions. [2021-06-05 06:11:18,681 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4133 transitions. Word has length 26 [2021-06-05 06:11:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:18,681 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 4133 transitions. [2021-06-05 06:11:18,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4133 transitions. [2021-06-05 06:11:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:11:18,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:18,683 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:18,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 06:11:18,883 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1004144201, now seen corresponding path program 101 times [2021-06-05 06:11:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:18,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884769004] [2021-06-05 06:11:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:19,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:19,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884769004] [2021-06-05 06:11:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884769004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113439794] [2021-06-05 06:11:19,077 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 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 06:11:19,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:11:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:11:19,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113439794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:19,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:11:19,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579989785] [2021-06-05 06:11:19,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:11:19,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:11:19,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:11:19,516 INFO L87 Difference]: Start difference. First operand 972 states and 4133 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:19,756 INFO L93 Difference]: Finished difference Result 1074 states and 4467 transitions. [2021-06-05 06:11:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:11:19,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:11:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:19,758 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 06:11:19,758 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 06:11:19,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:11:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 06:11:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 998. [2021-06-05 06:11:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 4.235707121364093) internal successors, (4223), 997 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4223 transitions. [2021-06-05 06:11:19,769 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4223 transitions. Word has length 26 [2021-06-05 06:11:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:19,769 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 4223 transitions. [2021-06-05 06:11:19,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4223 transitions. [2021-06-05 06:11:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:11:19,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:19,771 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:19,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:11:19,971 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1300083919, now seen corresponding path program 102 times [2021-06-05 06:11:19,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:19,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939038763] [2021-06-05 06:11:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:20,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:20,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939038763] [2021-06-05 06:11:20,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939038763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:20,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705258344] [2021-06-05 06:11:20,065 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 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 06:11:20,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:11:20,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:11:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:20,504 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 7 treesize of output 3 [2021-06-05 06:11:20,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:20,508 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 7 treesize of output 3 [2021-06-05 06:11:20,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:20,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:20,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:11:20,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:99, output treesize:85 [2021-06-05 06:11:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:20,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705258344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:20,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:20,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-06-05 06:11:20,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513012730] [2021-06-05 06:11:20,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:11:20,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:20,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:11:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:11:20,616 INFO L87 Difference]: Start difference. First operand 998 states and 4223 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:20,882 INFO L93 Difference]: Finished difference Result 1103 states and 4427 transitions. [2021-06-05 06:11:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:11:20,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:11:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:20,884 INFO L225 Difference]: With dead ends: 1103 [2021-06-05 06:11:20,884 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 06:11:20,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:11:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 06:11:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1004. [2021-06-05 06:11:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-06-05 06:11:20,896 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-06-05 06:11:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:20,896 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-06-05 06:11:20,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-06-05 06:11:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:11:20,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:20,897 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:21,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:11:21,113 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash -897954321, now seen corresponding path program 103 times [2021-06-05 06:11:21,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:21,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722167988] [2021-06-05 06:11:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:21,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:21,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722167988] [2021-06-05 06:11:21,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722167988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:21,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510869757] [2021-06-05 06:11:21,258 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 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 06:11:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:21,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:11:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:21,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510869757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:21,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:21,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:11:21,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022511324] [2021-06-05 06:11:21,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:11:21,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:11:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:11:21,781 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:21,989 INFO L93 Difference]: Finished difference Result 1059 states and 4372 transitions. [2021-06-05 06:11:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:11:21,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:11:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:21,991 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 06:11:21,991 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 06:11:21,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:11:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 06:11:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1004. [2021-06-05 06:11:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-06-05 06:11:22,002 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-06-05 06:11:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:22,003 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-06-05 06:11:22,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-06-05 06:11:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:11:22,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:22,004 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:22,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 06:11:22,204 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1993141583, now seen corresponding path program 104 times [2021-06-05 06:11:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:22,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845872011] [2021-06-05 06:11:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:11:22,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845872011] [2021-06-05 06:11:22,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845872011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110744878] [2021-06-05 06:11:22,287 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 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 06:11:22,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:11:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:11:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:22,703 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 7 treesize of output 3 [2021-06-05 06:11:22,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:22,707 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 7 treesize of output 3 [2021-06-05 06:11:22,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:22,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:22,786 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 7 treesize of output 3 [2021-06-05 06:11:22,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:22,790 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 7 treesize of output 3 [2021-06-05 06:11:22,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:22,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:22,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 06:11:22,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-05 06:12:29,582 WARN L205 SmtUtils]: Spent 1.11 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 06:12:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:12:29,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110744878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:12:29,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:12:29,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 06:12:29,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942660883] [2021-06-05 06:12:29,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:12:29,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:12:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:12:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:12:29,665 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 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 06:14:01,401 WARN L205 SmtUtils]: Spent 1.53 m on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 06:14:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:01,485 INFO L93 Difference]: Finished difference Result 1021 states and 4224 transitions. [2021-06-05 06:14:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:14:01,486 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 26 [2021-06-05 06:14:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:01,487 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 06:14:01,487 INFO L226 Difference]: Without dead ends: 1013 [2021-06-05 06:14:01,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 158711.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:14:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-05 06:14:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 989. [2021-06-05 06:14:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 4.202429149797571) internal successors, (4152), 988 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 4152 transitions. [2021-06-05 06:14:01,499 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 4152 transitions. Word has length 26 [2021-06-05 06:14:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:01,499 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 4152 transitions. [2021-06-05 06:14:01,499 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 06:14:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 4152 transitions. [2021-06-05 06:14:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:14:01,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:01,500 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:01,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:01,705 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1627018895, now seen corresponding path program 105 times [2021-06-05 06:14:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:01,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617454308] [2021-06-05 06:14:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:01,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617454308] [2021-06-05 06:14:01,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617454308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956152800] [2021-06-05 06:14:01,851 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 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 06:14:01,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:14:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:02,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956152800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:02,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:02,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:02,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860426223] [2021-06-05 06:14:02,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:02,385 INFO L87 Difference]: Start difference. First operand 989 states and 4152 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:14:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:02,689 INFO L93 Difference]: Finished difference Result 1036 states and 4291 transitions. [2021-06-05 06:14:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:14:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:02,691 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 06:14:02,691 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 06:14:02,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 06:14:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 985. [2021-06-05 06:14:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 4.211382113821138) internal successors, (4144), 984 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 4144 transitions. [2021-06-05 06:14:02,702 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 4144 transitions. Word has length 26 [2021-06-05 06:14:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:02,702 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 4144 transitions. [2021-06-05 06:14:02,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:14:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 4144 transitions. [2021-06-05 06:14:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:14:02,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:02,704 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:02,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 06:14:02,904 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1202707659, now seen corresponding path program 106 times [2021-06-05 06:14:02,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:02,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081032919] [2021-06-05 06:14:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:03,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081032919] [2021-06-05 06:14:03,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081032919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:03,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902953201] [2021-06-05 06:14:03,067 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 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 06:14:03,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:03,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:03,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902953201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:03,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:03,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961288384] [2021-06-05 06:14:03,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:03,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:03,666 INFO L87 Difference]: Start difference. First operand 985 states and 4144 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:14:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:04,071 INFO L93 Difference]: Finished difference Result 1044 states and 4311 transitions. [2021-06-05 06:14:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 26 [2021-06-05 06:14:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:04,073 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 06:14:04,073 INFO L226 Difference]: Without dead ends: 1036 [2021-06-05 06:14:04,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 812.3ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-05 06:14:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 983. [2021-06-05 06:14:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 4.214867617107943) internal successors, (4139), 982 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 4139 transitions. [2021-06-05 06:14:04,085 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 4139 transitions. Word has length 26 [2021-06-05 06:14:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:04,085 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 4139 transitions. [2021-06-05 06:14:04,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 06:14:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 4139 transitions. [2021-06-05 06:14:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:14:04,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:04,086 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:04,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:04,287 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:04,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1918224333, now seen corresponding path program 107 times [2021-06-05 06:14:04,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:04,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920401712] [2021-06-05 06:14:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:04,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:04,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920401712] [2021-06-05 06:14:04,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920401712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:04,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025306357] [2021-06-05 06:14:04,364 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 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 06:14:04,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:14:04,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:14:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:04,753 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 7 treesize of output 3 [2021-06-05 06:14:04,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:04,757 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 7 treesize of output 3 [2021-06-05 06:14:04,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:04,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:04,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:04,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:115 [2021-06-05 06:14:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:04,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025306357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:04,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:04,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 06:14:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309699707] [2021-06-05 06:14:04,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:14:04,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:14:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:14:04,935 INFO L87 Difference]: Start difference. First operand 983 states and 4139 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:05,091 INFO L93 Difference]: Finished difference Result 949 states and 3881 transitions. [2021-06-05 06:14:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:14:05,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:14:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:05,093 INFO L225 Difference]: With dead ends: 949 [2021-06-05 06:14:05,093 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 06:14:05,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:14:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 06:14:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 911. [2021-06-05 06:14:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 4.175824175824176) internal successors, (3800), 910 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3800 transitions. [2021-06-05 06:14:05,103 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3800 transitions. Word has length 26 [2021-06-05 06:14:05,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:05,103 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3800 transitions. [2021-06-05 06:14:05,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3800 transitions. [2021-06-05 06:14:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:14:05,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:05,105 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:05,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 06:14:05,305 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:05,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1352029039, now seen corresponding path program 108 times [2021-06-05 06:14:05,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:05,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20089611] [2021-06-05 06:14:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:05,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:05,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20089611] [2021-06-05 06:14:05,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20089611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:05,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611545744] [2021-06-05 06:14:05,539 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 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 06:14:05,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:14:05,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:05,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611545744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:06,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:06,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190700645] [2021-06-05 06:14:06,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:06,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:06,126 INFO L87 Difference]: Start difference. First operand 911 states and 3800 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:06,439 INFO L93 Difference]: Finished difference Result 985 states and 4052 transitions. [2021-06-05 06:14:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:14:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:06,441 INFO L225 Difference]: With dead ends: 985 [2021-06-05 06:14:06,441 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 06:14:06,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 06:14:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 915. [2021-06-05 06:14:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 4.168490153172867) internal successors, (3810), 914 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3810 transitions. [2021-06-05 06:14:06,451 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3810 transitions. Word has length 26 [2021-06-05 06:14:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:06,451 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 3810 transitions. [2021-06-05 06:14:06,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3810 transitions. [2021-06-05 06:14:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:14:06,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:06,453 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:06,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:06,653 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1778450295, now seen corresponding path program 109 times [2021-06-05 06:14:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:06,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412114585] [2021-06-05 06:14:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:06,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412114585] [2021-06-05 06:14:06,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412114585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3672703] [2021-06-05 06:14:06,846 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 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 06:14:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:07,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3672703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:07,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:07,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578790432] [2021-06-05 06:14:07,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:07,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:07,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:07,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:07,479 INFO L87 Difference]: Start difference. First operand 915 states and 3810 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:07,870 INFO L93 Difference]: Finished difference Result 958 states and 3949 transitions. [2021-06-05 06:14:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:14:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:07,872 INFO L225 Difference]: With dead ends: 958 [2021-06-05 06:14:07,872 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 06:14:07,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 866.2ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 06:14:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 907. [2021-06-05 06:14:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.181015452538631) internal successors, (3788), 906 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3788 transitions. [2021-06-05 06:14:07,883 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3788 transitions. Word has length 26 [2021-06-05 06:14:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:07,883 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3788 transitions. [2021-06-05 06:14:07,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3788 transitions. [2021-06-05 06:14:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:14:07,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:07,884 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:08,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:08,085 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 826574097, now seen corresponding path program 110 times [2021-06-05 06:14:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:08,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449791400] [2021-06-05 06:14:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:08,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449791400] [2021-06-05 06:14:08,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449791400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478644771] [2021-06-05 06:14:08,258 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 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 06:14:08,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:08,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:08,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478644771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:08,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:08,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:14:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448950605] [2021-06-05 06:14:08,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:14:08,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:14:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:14:08,775 INFO L87 Difference]: Start difference. First operand 907 states and 3788 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:09,109 INFO L93 Difference]: Finished difference Result 954 states and 3919 transitions. [2021-06-05 06:14:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:09,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:14:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:09,110 INFO L225 Difference]: With dead ends: 954 [2021-06-05 06:14:09,111 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 06:14:09,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 746.4ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 06:14:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 895. [2021-06-05 06:14:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 4.196868008948546) internal successors, (3752), 894 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3752 transitions. [2021-06-05 06:14:09,121 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3752 transitions. Word has length 26 [2021-06-05 06:14:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:09,121 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3752 transitions. [2021-06-05 06:14:09,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3752 transitions. [2021-06-05 06:14:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:09,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:09,122 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:09,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 06:14:09,323 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1463466562, now seen corresponding path program 111 times [2021-06-05 06:14:09,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:09,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560097863] [2021-06-05 06:14:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:09,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:09,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560097863] [2021-06-05 06:14:09,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560097863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:09,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119708289] [2021-06-05 06:14:09,492 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 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 06:14:09,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:14:09,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119708289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:10,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:10,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802240436] [2021-06-05 06:14:10,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:10,176 INFO L87 Difference]: Start difference. First operand 895 states and 3752 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:10,434 INFO L93 Difference]: Finished difference Result 925 states and 3819 transitions. [2021-06-05 06:14:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:10,436 INFO L225 Difference]: With dead ends: 925 [2021-06-05 06:14:10,436 INFO L226 Difference]: Without dead ends: 909 [2021-06-05 06:14:10,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 818.6ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-06-05 06:14:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 897. [2021-06-05 06:14:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.180803571428571) internal successors, (3746), 896 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3746 transitions. [2021-06-05 06:14:10,446 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3746 transitions. Word has length 27 [2021-06-05 06:14:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:10,446 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3746 transitions. [2021-06-05 06:14:10,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3746 transitions. [2021-06-05 06:14:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:10,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:10,448 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:10,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:10,648 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 275921892, now seen corresponding path program 112 times [2021-06-05 06:14:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:10,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050721472] [2021-06-05 06:14:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:10,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:10,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050721472] [2021-06-05 06:14:10,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050721472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:10,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364844317] [2021-06-05 06:14:10,824 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 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 06:14:10,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:11,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364844317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:11,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:11,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679120847] [2021-06-05 06:14:11,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:11,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:11,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:11,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:11,401 INFO L87 Difference]: Start difference. First operand 897 states and 3746 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:11,899 INFO L93 Difference]: Finished difference Result 922 states and 3798 transitions. [2021-06-05 06:14:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:14:11,899 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:11,900 INFO L225 Difference]: With dead ends: 922 [2021-06-05 06:14:11,900 INFO L226 Difference]: Without dead ends: 908 [2021-06-05 06:14:11,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 898.2ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:14:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-05 06:14:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 891. [2021-06-05 06:14:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 4.180898876404495) internal successors, (3721), 890 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3721 transitions. [2021-06-05 06:14:11,910 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3721 transitions. Word has length 27 [2021-06-05 06:14:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:11,911 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3721 transitions. [2021-06-05 06:14:11,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3721 transitions. [2021-06-05 06:14:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:11,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:11,912 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:12,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 06:14:12,112 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash -572700580, now seen corresponding path program 113 times [2021-06-05 06:14:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:12,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483883847] [2021-06-05 06:14:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:12,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483883847] [2021-06-05 06:14:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483883847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602442464] [2021-06-05 06:14:12,321 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 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 06:14:12,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:14:12,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:13,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602442464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:13,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:13,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:13,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151872688] [2021-06-05 06:14:13,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:13,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:13,057 INFO L87 Difference]: Start difference. First operand 891 states and 3721 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:13,284 INFO L93 Difference]: Finished difference Result 933 states and 3816 transitions. [2021-06-05 06:14:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:13,285 INFO L225 Difference]: With dead ends: 933 [2021-06-05 06:14:13,285 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 06:14:13,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 06:14:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2021-06-05 06:14:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 4.174746335963923) internal successors, (3703), 887 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3703 transitions. [2021-06-05 06:14:13,295 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3703 transitions. Word has length 27 [2021-06-05 06:14:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:13,296 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3703 transitions. [2021-06-05 06:14:13,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3703 transitions. [2021-06-05 06:14:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:13,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:13,297 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:13,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:13,497 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1255922468, now seen corresponding path program 114 times [2021-06-05 06:14:13,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:13,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168724594] [2021-06-05 06:14:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:13,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:13,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168724594] [2021-06-05 06:14:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168724594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:13,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285315851] [2021-06-05 06:14:13,590 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 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 06:14:13,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:14:13,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:14:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:14,034 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 7 treesize of output 3 [2021-06-05 06:14:14,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:14,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:14,047 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 7 treesize of output 3 [2021-06-05 06:14:14,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:14,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:14,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:14:14,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2021-06-05 06:14:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285315851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-06-05 06:14:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865560251] [2021-06-05 06:14:14,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:14:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:14,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:14:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:14,092 INFO L87 Difference]: Start difference. First operand 888 states and 3703 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:14,327 INFO L93 Difference]: Finished difference Result 1936 states and 7355 transitions. [2021-06-05 06:14:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:14:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:14,330 INFO L225 Difference]: With dead ends: 1936 [2021-06-05 06:14:14,330 INFO L226 Difference]: Without dead ends: 1912 [2021-06-05 06:14:14,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:14:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-05 06:14:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 960. [2021-06-05 06:14:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 4.211678832116788) internal successors, (4039), 959 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4039 transitions. [2021-06-05 06:14:14,346 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4039 transitions. Word has length 27 [2021-06-05 06:14:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 4039 transitions. [2021-06-05 06:14:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4039 transitions. [2021-06-05 06:14:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:14,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:14,347 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:14,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:14,548 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash 231208544, now seen corresponding path program 115 times [2021-06-05 06:14:14,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:14,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397507835] [2021-06-05 06:14:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:14,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397507835] [2021-06-05 06:14:14,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397507835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205991600] [2021-06-05 06:14:14,699 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 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 06:14:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205991600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:15,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:15,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319728069] [2021-06-05 06:14:15,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:15,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:15,126 INFO L87 Difference]: Start difference. First operand 960 states and 4039 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:15,490 INFO L93 Difference]: Finished difference Result 989 states and 4112 transitions. [2021-06-05 06:14:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:15,491 INFO L225 Difference]: With dead ends: 989 [2021-06-05 06:14:15,492 INFO L226 Difference]: Without dead ends: 982 [2021-06-05 06:14:15,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-05 06:14:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 964. [2021-06-05 06:14:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 4.19730010384216) internal successors, (4042), 963 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 4042 transitions. [2021-06-05 06:14:15,503 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 4042 transitions. Word has length 27 [2021-06-05 06:14:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:15,503 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 4042 transitions. [2021-06-05 06:14:15,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 4042 transitions. [2021-06-05 06:14:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:15,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:15,504 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:15,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 06:14:15,705 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1019543526, now seen corresponding path program 116 times [2021-06-05 06:14:15,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:15,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129747454] [2021-06-05 06:14:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:15,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:15,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129747454] [2021-06-05 06:14:15,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129747454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:15,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515524424] [2021-06-05 06:14:15,822 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 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 06:14:15,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:14:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:16,234 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 7 treesize of output 3 [2021-06-05 06:14:16,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:16,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:16,273 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 7 treesize of output 3 [2021-06-05 06:14:16,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:16,277 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 7 treesize of output 3 [2021-06-05 06:14:16,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:16,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:16,312 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 7 treesize of output 3 [2021-06-05 06:14:16,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:16,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:16,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:16,347 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:121, output treesize:93 [2021-06-05 06:14:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:16,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515524424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:16,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:16,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 06:14:16,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528252682] [2021-06-05 06:14:16,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:14:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:14:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:16,454 INFO L87 Difference]: Start difference. First operand 964 states and 4042 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:19,237 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-06-05 06:14:21,329 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 06:14:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:21,359 INFO L93 Difference]: Finished difference Result 1303 states and 5057 transitions. [2021-06-05 06:14:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:14:21,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:21,362 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 06:14:21,362 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 06:14:21,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3152.3ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 06:14:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1004. [2021-06-05 06:14:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.161515453639082) internal successors, (4174), 1003 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4174 transitions. [2021-06-05 06:14:21,382 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4174 transitions. Word has length 27 [2021-06-05 06:14:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:21,382 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4174 transitions. [2021-06-05 06:14:21,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4174 transitions. [2021-06-05 06:14:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:21,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:21,384 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:21,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 06:14:21,584 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1395696506, now seen corresponding path program 117 times [2021-06-05 06:14:21,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:21,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941165946] [2021-06-05 06:14:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:21,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:21,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941165946] [2021-06-05 06:14:21,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941165946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:21,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055533414] [2021-06-05 06:14:21,743 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 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 06:14:21,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:14:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:22,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055533414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:22,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:22,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:22,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377624698] [2021-06-05 06:14:22,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:22,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:22,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:22,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:22,270 INFO L87 Difference]: Start difference. First operand 1004 states and 4174 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:22,725 INFO L93 Difference]: Finished difference Result 1036 states and 4233 transitions. [2021-06-05 06:14:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:22,725 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:22,727 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 06:14:22,727 INFO L226 Difference]: Without dead ends: 1018 [2021-06-05 06:14:22,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:14:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-05 06:14:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 991. [2021-06-05 06:14:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.161616161616162) internal successors, (4120), 990 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4120 transitions. [2021-06-05 06:14:22,739 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4120 transitions. Word has length 27 [2021-06-05 06:14:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:22,739 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4120 transitions. [2021-06-05 06:14:22,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4120 transitions. [2021-06-05 06:14:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:22,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:22,740 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:22,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 06:14:22,941 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:22,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1704301448, now seen corresponding path program 118 times [2021-06-05 06:14:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:22,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774856710] [2021-06-05 06:14:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:23,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:23,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774856710] [2021-06-05 06:14:23,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774856710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:23,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770775688] [2021-06-05 06:14:23,124 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 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 06:14:23,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:23,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:23,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:14:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770775688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:23,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:23,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632308479] [2021-06-05 06:14:23,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:23,737 INFO L87 Difference]: Start difference. First operand 991 states and 4120 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:24,135 INFO L93 Difference]: Finished difference Result 1016 states and 4172 transitions. [2021-06-05 06:14:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:24,137 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 06:14:24,137 INFO L226 Difference]: Without dead ends: 1002 [2021-06-05 06:14:24,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-06-05 06:14:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 988. [2021-06-05 06:14:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 4.156028368794326) internal successors, (4102), 987 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 4102 transitions. [2021-06-05 06:14:24,149 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 4102 transitions. Word has length 27 [2021-06-05 06:14:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:24,149 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 4102 transitions. [2021-06-05 06:14:24,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 4102 transitions. [2021-06-05 06:14:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:24,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:24,151 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:24,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:24,351 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:24,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1973047876, now seen corresponding path program 119 times [2021-06-05 06:14:24,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:24,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422867956] [2021-06-05 06:14:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:24,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422867956] [2021-06-05 06:14:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422867956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995184781] [2021-06-05 06:14:24,510 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 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 06:14:24,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:14:24,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:24,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:24,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:25,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995184781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:25,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:25,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:25,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976131287] [2021-06-05 06:14:25,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:25,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:25,091 INFO L87 Difference]: Start difference. First operand 988 states and 4102 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:25,404 INFO L93 Difference]: Finished difference Result 959 states and 3842 transitions. [2021-06-05 06:14:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:14:25,404 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:25,406 INFO L225 Difference]: With dead ends: 959 [2021-06-05 06:14:25,406 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 06:14:25,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 680.5ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:14:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 06:14:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 920. [2021-06-05 06:14:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.077257889009793) internal successors, (3747), 919 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3747 transitions. [2021-06-05 06:14:25,416 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3747 transitions. Word has length 27 [2021-06-05 06:14:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:25,417 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3747 transitions. [2021-06-05 06:14:25,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3747 transitions. [2021-06-05 06:14:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:25,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:25,418 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:25,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 06:14:25,618 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash -174588260, now seen corresponding path program 120 times [2021-06-05 06:14:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:25,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753891218] [2021-06-05 06:14:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:25,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:25,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753891218] [2021-06-05 06:14:25,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753891218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:25,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130559885] [2021-06-05 06:14:25,776 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 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 06:14:25,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:14:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:26,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130559885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:26,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:26,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451072584] [2021-06-05 06:14:26,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:26,342 INFO L87 Difference]: Start difference. First operand 920 states and 3747 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:26,682 INFO L93 Difference]: Finished difference Result 963 states and 3864 transitions. [2021-06-05 06:14:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:26,684 INFO L225 Difference]: With dead ends: 963 [2021-06-05 06:14:26,684 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 06:14:26,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 06:14:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 938. [2021-06-05 06:14:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 4.049092849519744) internal successors, (3794), 937 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3794 transitions. [2021-06-05 06:14:26,694 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3794 transitions. Word has length 27 [2021-06-05 06:14:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:26,695 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3794 transitions. [2021-06-05 06:14:26,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3794 transitions. [2021-06-05 06:14:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:26,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:26,696 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:26,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:26,896 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1425340330, now seen corresponding path program 121 times [2021-06-05 06:14:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:26,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107386899] [2021-06-05 06:14:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:27,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107386899] [2021-06-05 06:14:27,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107386899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160897137] [2021-06-05 06:14:27,026 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 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 06:14:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:14:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:27,385 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 7 treesize of output 3 [2021-06-05 06:14:27,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:27,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:27,421 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 7 treesize of output 3 [2021-06-05 06:14:27,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:27,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:27,454 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 7 treesize of output 3 [2021-06-05 06:14:27,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:27,458 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 7 treesize of output 3 [2021-06-05 06:14:27,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:27,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:27,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:27,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:107, output treesize:79 [2021-06-05 06:14:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:27,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160897137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:27,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:27,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 06:14:27,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858580129] [2021-06-05 06:14:27,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:14:27,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:14:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:14:27,573 INFO L87 Difference]: Start difference. First operand 938 states and 3794 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:31,819 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 06:14:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:40,123 INFO L93 Difference]: Finished difference Result 3046 states and 12070 transitions. [2021-06-05 06:14:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:14:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:40,128 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 06:14:40,128 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 06:14:40,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4703.7ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 06:14:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1289. [2021-06-05 06:14:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 4.475931677018633) internal successors, (5765), 1288 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 5765 transitions. [2021-06-05 06:14:40,154 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 5765 transitions. Word has length 27 [2021-06-05 06:14:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:40,154 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 5765 transitions. [2021-06-05 06:14:40,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 5765 transitions. [2021-06-05 06:14:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:40,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:40,156 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:40,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 06:14:40,356 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:40,356 INFO L82 PathProgramCache]: Analyzing trace with hash 989899702, now seen corresponding path program 122 times [2021-06-05 06:14:40,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:40,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911340960] [2021-06-05 06:14:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:40,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911340960] [2021-06-05 06:14:40,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911340960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698311575] [2021-06-05 06:14:40,531 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 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 06:14:40,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:40,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:14:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:41,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698311575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:41,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:41,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:41,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611244480] [2021-06-05 06:14:41,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:41,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:41,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:41,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:41,086 INFO L87 Difference]: Start difference. First operand 1289 states and 5765 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:41,446 INFO L93 Difference]: Finished difference Result 1336 states and 5880 transitions. [2021-06-05 06:14:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:41,448 INFO L225 Difference]: With dead ends: 1336 [2021-06-05 06:14:41,448 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 06:14:41,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 06:14:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1292. [2021-06-05 06:14:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.472501936483346) internal successors, (5774), 1291 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5774 transitions. [2021-06-05 06:14:41,464 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5774 transitions. Word has length 27 [2021-06-05 06:14:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:41,464 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5774 transitions. [2021-06-05 06:14:41,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5774 transitions. [2021-06-05 06:14:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:41,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:41,466 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:41,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:41,669 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1435291434, now seen corresponding path program 123 times [2021-06-05 06:14:41,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:41,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479459190] [2021-06-05 06:14:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:41,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:41,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479459190] [2021-06-05 06:14:41,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479459190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:41,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297599292] [2021-06-05 06:14:41,811 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 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 06:14:41,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:14:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:14:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:42,123 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 7 treesize of output 3 [2021-06-05 06:14:42,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,128 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 7 treesize of output 3 [2021-06-05 06:14:42,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:42,163 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 7 treesize of output 3 [2021-06-05 06:14:42,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,166 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 7 treesize of output 3 [2021-06-05 06:14:42,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:42,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:42,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:42,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-05 06:14:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:42,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297599292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:42,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:42,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 06:14:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987649839] [2021-06-05 06:14:42,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:14:42,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:14:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:42,294 INFO L87 Difference]: Start difference. First operand 1292 states and 5774 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:42,825 INFO L93 Difference]: Finished difference Result 3442 states and 14583 transitions. [2021-06-05 06:14:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:14:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:42,831 INFO L225 Difference]: With dead ends: 3442 [2021-06-05 06:14:42,831 INFO L226 Difference]: Without dead ends: 3422 [2021-06-05 06:14:42,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-05 06:14:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1575. [2021-06-05 06:14:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 4.708386277001271) internal successors, (7411), 1574 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 7411 transitions. [2021-06-05 06:14:42,873 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 7411 transitions. Word has length 27 [2021-06-05 06:14:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:42,873 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 7411 transitions. [2021-06-05 06:14:42,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 7411 transitions. [2021-06-05 06:14:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:42,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:42,875 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:43,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:43,081 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2110098252, now seen corresponding path program 124 times [2021-06-05 06:14:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:43,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981175260] [2021-06-05 06:14:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:43,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:43,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981175260] [2021-06-05 06:14:43,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981175260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:43,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446477722] [2021-06-05 06:14:43,242 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 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 06:14:43,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:43,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446477722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:43,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:43,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:43,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935072807] [2021-06-05 06:14:43,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:43,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:43,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:43,672 INFO L87 Difference]: Start difference. First operand 1575 states and 7411 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:43,966 INFO L93 Difference]: Finished difference Result 1607 states and 7481 transitions. [2021-06-05 06:14:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:43,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:43,969 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 06:14:43,969 INFO L226 Difference]: Without dead ends: 1593 [2021-06-05 06:14:43,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-05 06:14:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2021-06-05 06:14:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.707829408020369) internal successors, (7396), 1571 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7396 transitions. [2021-06-05 06:14:43,989 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7396 transitions. Word has length 27 [2021-06-05 06:14:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:43,989 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 7396 transitions. [2021-06-05 06:14:43,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7396 transitions. [2021-06-05 06:14:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:43,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:43,991 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:44,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 06:14:44,192 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1916122616, now seen corresponding path program 125 times [2021-06-05 06:14:44,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:44,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925816447] [2021-06-05 06:14:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:44,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:44,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925816447] [2021-06-05 06:14:44,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925816447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:44,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099163096] [2021-06-05 06:14:44,357 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 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 06:14:44,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:14:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099163096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:44,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:44,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129174003] [2021-06-05 06:14:44,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:44,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:44,979 INFO L87 Difference]: Start difference. First operand 1572 states and 7396 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:45,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:45,194 INFO L93 Difference]: Finished difference Result 1596 states and 7442 transitions. [2021-06-05 06:14:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:14:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:45,196 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 06:14:45,196 INFO L226 Difference]: Without dead ends: 1577 [2021-06-05 06:14:45,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-06-05 06:14:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1549. [2021-06-05 06:14:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.732558139534884) internal successors, (7326), 1548 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7326 transitions. [2021-06-05 06:14:45,216 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7326 transitions. Word has length 27 [2021-06-05 06:14:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:45,216 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7326 transitions. [2021-06-05 06:14:45,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7326 transitions. [2021-06-05 06:14:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:45,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:45,218 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:45,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:45,419 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:45,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2033600990, now seen corresponding path program 126 times [2021-06-05 06:14:45,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:45,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835008404] [2021-06-05 06:14:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:45,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835008404] [2021-06-05 06:14:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835008404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979437852] [2021-06-05 06:14:45,587 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 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 06:14:45,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:14:45,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:45,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:46,126 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 7 treesize of output 3 [2021-06-05 06:14:46,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,169 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 7 treesize of output 3 [2021-06-05 06:14:46,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,173 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 7 treesize of output 3 [2021-06-05 06:14:46,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,210 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 7 treesize of output 3 [2021-06-05 06:14:46,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:46,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:46,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:46,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:133, output treesize:105 [2021-06-05 06:14:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:46,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979437852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:46,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:46,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-06-05 06:14:46,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044993753] [2021-06-05 06:14:46,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:14:46,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:14:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:14:46,367 INFO L87 Difference]: Start difference. First operand 1549 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:47,002 INFO L93 Difference]: Finished difference Result 1650 states and 7580 transitions. [2021-06-05 06:14:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:47,005 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 06:14:47,005 INFO L226 Difference]: Without dead ends: 1642 [2021-06-05 06:14:47,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1038.9ms TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:14:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-06-05 06:14:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1549. [2021-06-05 06:14:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.715762273901809) internal successors, (7300), 1548 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7300 transitions. [2021-06-05 06:14:47,025 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7300 transitions. Word has length 27 [2021-06-05 06:14:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:47,026 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7300 transitions. [2021-06-05 06:14:47,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7300 transitions. [2021-06-05 06:14:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:47,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:47,028 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:47,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:47,228 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1358794172, now seen corresponding path program 127 times [2021-06-05 06:14:47,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:47,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4558971] [2021-06-05 06:14:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:47,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:47,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4558971] [2021-06-05 06:14:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4558971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:47,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081480206] [2021-06-05 06:14:47,379 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 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 06:14:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:47,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081480206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:47,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:47,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:47,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094110845] [2021-06-05 06:14:47,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:47,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:47,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:47,990 INFO L87 Difference]: Start difference. First operand 1549 states and 7300 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:48,213 INFO L93 Difference]: Finished difference Result 1575 states and 7357 transitions. [2021-06-05 06:14:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:14:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:48,215 INFO L225 Difference]: With dead ends: 1575 [2021-06-05 06:14:48,215 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 06:14:48,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 06:14:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1542. [2021-06-05 06:14:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 4.720960415314731) internal successors, (7275), 1541 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 7275 transitions. [2021-06-05 06:14:48,235 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 7275 transitions. Word has length 27 [2021-06-05 06:14:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:48,235 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 7275 transitions. [2021-06-05 06:14:48,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 7275 transitions. [2021-06-05 06:14:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:48,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:48,237 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:48,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-05 06:14:48,437 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1617589496, now seen corresponding path program 128 times [2021-06-05 06:14:48,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:48,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875301429] [2021-06-05 06:14:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:48,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:48,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875301429] [2021-06-05 06:14:48,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875301429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:48,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007718007] [2021-06-05 06:14:48,662 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 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 06:14:48,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:48,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:14:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:49,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007718007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:49,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:49,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:49,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451298205] [2021-06-05 06:14:49,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:49,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:49,337 INFO L87 Difference]: Start difference. First operand 1542 states and 7275 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:49,651 INFO L93 Difference]: Finished difference Result 1472 states and 6714 transitions. [2021-06-05 06:14:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:49,653 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 06:14:49,653 INFO L226 Difference]: Without dead ends: 1458 [2021-06-05 06:14:49,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 889.3ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-06-05 06:14:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1437. [2021-06-05 06:14:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 4.616295264623956) internal successors, (6629), 1436 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 6629 transitions. [2021-06-05 06:14:49,671 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 6629 transitions. Word has length 27 [2021-06-05 06:14:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:49,671 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 6629 transitions. [2021-06-05 06:14:49,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 6629 transitions. [2021-06-05 06:14:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:49,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:49,673 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:49,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:49,873 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1348843068, now seen corresponding path program 129 times [2021-06-05 06:14:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:49,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526357544] [2021-06-05 06:14:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:50,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:50,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526357544] [2021-06-05 06:14:50,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526357544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:50,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031555075] [2021-06-05 06:14:50,025 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 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 06:14:50,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:14:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:50,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031555075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:50,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:50,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:50,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786276572] [2021-06-05 06:14:50,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:50,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:50,686 INFO L87 Difference]: Start difference. First operand 1437 states and 6629 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:51,069 INFO L93 Difference]: Finished difference Result 1273 states and 5538 transitions. [2021-06-05 06:14:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:14:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:51,072 INFO L225 Difference]: With dead ends: 1273 [2021-06-05 06:14:51,072 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 06:14:51,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:14:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 06:14:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1232. [2021-06-05 06:14:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.418359057676685) internal successors, (5439), 1231 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5439 transitions. [2021-06-05 06:14:51,086 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5439 transitions. Word has length 27 [2021-06-05 06:14:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:51,086 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5439 transitions. [2021-06-05 06:14:51,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5439 transitions. [2021-06-05 06:14:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:51,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:51,088 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:51,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 06:14:51,288 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:51,289 INFO L82 PathProgramCache]: Analyzing trace with hash -133551674, now seen corresponding path program 130 times [2021-06-05 06:14:51,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:51,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152577238] [2021-06-05 06:14:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:51,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:51,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152577238] [2021-06-05 06:14:51,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152577238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:51,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402046180] [2021-06-05 06:14:51,424 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 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 06:14:51,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:51,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:51,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:14:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:51,713 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 7 treesize of output 3 [2021-06-05 06:14:51,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,717 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 7 treesize of output 3 [2021-06-05 06:14:51,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:51,751 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 7 treesize of output 3 [2021-06-05 06:14:51,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,755 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 7 treesize of output 3 [2021-06-05 06:14:51,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:51,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:51,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:51,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-05 06:14:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:51,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402046180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:51,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:51,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-06-05 06:14:51,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793253258] [2021-06-05 06:14:51,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:14:51,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:51,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:14:51,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:14:51,881 INFO L87 Difference]: Start difference. First operand 1232 states and 5439 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:52,286 INFO L93 Difference]: Finished difference Result 2587 states and 10394 transitions. [2021-06-05 06:14:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:14:52,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:52,291 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 06:14:52,291 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 06:14:52,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:14:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 06:14:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1419. [2021-06-05 06:14:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 4.562059238363893) internal successors, (6469), 1418 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 6469 transitions. [2021-06-05 06:14:52,314 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 6469 transitions. Word has length 27 [2021-06-05 06:14:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:52,314 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 6469 transitions. [2021-06-05 06:14:52,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 6469 transitions. [2021-06-05 06:14:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:52,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:52,316 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:52,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:52,517 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1158265598, now seen corresponding path program 131 times [2021-06-05 06:14:52,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:52,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203392806] [2021-06-05 06:14:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:52,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:52,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203392806] [2021-06-05 06:14:52,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203392806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:52,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517888431] [2021-06-05 06:14:52,665 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 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 06:14:52,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:14:52,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:53,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517888431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:53,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:53,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:53,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864717621] [2021-06-05 06:14:53,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:53,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:53,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:53,334 INFO L87 Difference]: Start difference. First operand 1419 states and 6469 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:53,498 INFO L93 Difference]: Finished difference Result 1448 states and 6542 transitions. [2021-06-05 06:14:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:14:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:53,500 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 06:14:53,500 INFO L226 Difference]: Without dead ends: 1440 [2021-06-05 06:14:53,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 653.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-06-05 06:14:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1417. [2021-06-05 06:14:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 4.562146892655368) internal successors, (6460), 1416 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 6460 transitions. [2021-06-05 06:14:53,517 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 6460 transitions. Word has length 27 [2021-06-05 06:14:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:53,517 INFO L482 AbstractCegarLoop]: Abstraction has 1417 states and 6460 transitions. [2021-06-05 06:14:53,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 6460 transitions. [2021-06-05 06:14:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:53,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:53,519 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:53,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 06:14:53,720 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash -664653662, now seen corresponding path program 132 times [2021-06-05 06:14:53,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:53,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710341290] [2021-06-05 06:14:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:53,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710341290] [2021-06-05 06:14:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710341290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654135757] [2021-06-05 06:14:53,836 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 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 06:14:53,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:14:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:14:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:54,410 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 7 treesize of output 3 [2021-06-05 06:14:54,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,429 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 7 treesize of output 3 [2021-06-05 06:14:54,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:54,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:54,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:14:54,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-06-05 06:14:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:54,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654135757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:54,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:54,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 06:14:54,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532922007] [2021-06-05 06:14:54,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:14:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:14:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:14:54,492 INFO L87 Difference]: Start difference. First operand 1417 states and 6460 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:54,772 INFO L93 Difference]: Finished difference Result 1648 states and 7113 transitions. [2021-06-05 06:14:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:14:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:54,774 INFO L225 Difference]: With dead ends: 1648 [2021-06-05 06:14:54,774 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 06:14:54,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 06:14:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1436. [2021-06-05 06:14:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 4.559581881533101) internal successors, (6543), 1435 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 6543 transitions. [2021-06-05 06:14:54,793 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 6543 transitions. Word has length 27 [2021-06-05 06:14:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:54,793 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 6543 transitions. [2021-06-05 06:14:54,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 6543 transitions. [2021-06-05 06:14:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:54,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:54,795 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:54,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:54,995 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -267499616, now seen corresponding path program 133 times [2021-06-05 06:14:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:54,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951393547] [2021-06-05 06:14:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:55,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:55,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951393547] [2021-06-05 06:14:55,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951393547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:55,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559184169] [2021-06-05 06:14:55,171 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 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 06:14:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559184169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:55,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827275318] [2021-06-05 06:14:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:55,842 INFO L87 Difference]: Start difference. First operand 1436 states and 6543 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:56,385 INFO L93 Difference]: Finished difference Result 1480 states and 6651 transitions. [2021-06-05 06:14:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:14:56,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:56,387 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 06:14:56,387 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 06:14:56,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:14:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 06:14:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1441. [2021-06-05 06:14:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.552777777777778) internal successors, (6556), 1440 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6556 transitions. [2021-06-05 06:14:56,405 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6556 transitions. Word has length 27 [2021-06-05 06:14:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:56,405 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6556 transitions. [2021-06-05 06:14:56,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6556 transitions. [2021-06-05 06:14:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:56,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:56,407 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:56,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:14:56,608 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1700897470, now seen corresponding path program 134 times [2021-06-05 06:14:56,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:56,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459196424] [2021-06-05 06:14:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:56,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:56,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459196424] [2021-06-05 06:14:56,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459196424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:56,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372926723] [2021-06-05 06:14:56,798 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 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 06:14:56,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:14:56,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:57,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372926723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:57,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:57,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:14:57,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52561829] [2021-06-05 06:14:57,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:14:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:57,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:14:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:14:57,429 INFO L87 Difference]: Start difference. First operand 1441 states and 6556 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:57,870 INFO L93 Difference]: Finished difference Result 1485 states and 6664 transitions. [2021-06-05 06:14:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:14:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:57,873 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 06:14:57,873 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 06:14:57,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 866.8ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:14:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 06:14:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1441. [2021-06-05 06:14:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.551388888888889) internal successors, (6554), 1440 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6554 transitions. [2021-06-05 06:14:57,891 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6554 transitions. Word has length 27 [2021-06-05 06:14:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:57,891 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6554 transitions. [2021-06-05 06:14:57,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6554 transitions. [2021-06-05 06:14:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:57,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:57,893 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:58,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 06:14:58,093 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash -724293666, now seen corresponding path program 135 times [2021-06-05 06:14:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:58,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846507480] [2021-06-05 06:14:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:58,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:58,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846507480] [2021-06-05 06:14:58,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846507480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:58,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595034737] [2021-06-05 06:14:58,225 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 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 06:14:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:14:58,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:14:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:14:58,503 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 7 treesize of output 3 [2021-06-05 06:14:58,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,507 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 7 treesize of output 3 [2021-06-05 06:14:58,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:58,537 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 7 treesize of output 3 [2021-06-05 06:14:58,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,548 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 7 treesize of output 3 [2021-06-05 06:14:58,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:14:58,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:14:58,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:14:58,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:71 [2021-06-05 06:14:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:14:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595034737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:58,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:14:58,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 06:14:58,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296626381] [2021-06-05 06:14:58,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:14:58,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:14:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:14:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:14:58,657 INFO L87 Difference]: Start difference. First operand 1441 states and 6554 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:14:59,251 INFO L93 Difference]: Finished difference Result 2434 states and 10147 transitions. [2021-06-05 06:14:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:14:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:14:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:14:59,255 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 06:14:59,255 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 06:14:59,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:14:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 06:14:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1570. [2021-06-05 06:14:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 4.625239005736137) internal successors, (7257), 1569 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 7257 transitions. [2021-06-05 06:14:59,279 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 7257 transitions. Word has length 27 [2021-06-05 06:14:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:14:59,279 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 7257 transitions. [2021-06-05 06:14:59,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:14:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 7257 transitions. [2021-06-05 06:14:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:14:59,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:14:59,281 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:14:59,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 06:14:59,481 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:14:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:14:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1399100484, now seen corresponding path program 136 times [2021-06-05 06:14:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:14:59,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240022854] [2021-06-05 06:14:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:14:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:14:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:14:59,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:14:59,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240022854] [2021-06-05 06:14:59,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240022854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:14:59,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419116733] [2021-06-05 06:14:59,629 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 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 06:14:59,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:14:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:14:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:14:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:00,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419116733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:00,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:00,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:15:00,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885918466] [2021-06-05 06:15:00,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:15:00,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:00,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:15:00,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:00,169 INFO L87 Difference]: Start difference. First operand 1570 states and 7257 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:00,533 INFO L93 Difference]: Finished difference Result 1530 states and 6921 transitions. [2021-06-05 06:15:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:00,535 INFO L225 Difference]: With dead ends: 1530 [2021-06-05 06:15:00,535 INFO L226 Difference]: Without dead ends: 1516 [2021-06-05 06:15:00,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-05 06:15:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1499. [2021-06-05 06:15:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 4.568758344459279) internal successors, (6844), 1498 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 6844 transitions. [2021-06-05 06:15:00,566 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 6844 transitions. Word has length 27 [2021-06-05 06:15:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:00,566 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 6844 transitions. [2021-06-05 06:15:00,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 6844 transitions. [2021-06-05 06:15:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:00,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:00,569 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:00,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-06-05 06:15:00,769 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:00,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1667846912, now seen corresponding path program 137 times [2021-06-05 06:15:00,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:00,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791982238] [2021-06-05 06:15:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:00,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791982238] [2021-06-05 06:15:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791982238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727851203] [2021-06-05 06:15:00,927 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 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 06:15:00,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:15:00,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:15:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:01,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727851203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:01,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:01,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:15:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919047174] [2021-06-05 06:15:01,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:15:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:15:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:01,551 INFO L87 Difference]: Start difference. First operand 1499 states and 6844 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:01,789 INFO L93 Difference]: Finished difference Result 1529 states and 6905 transitions. [2021-06-05 06:15:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:15:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:01,792 INFO L225 Difference]: With dead ends: 1529 [2021-06-05 06:15:01,792 INFO L226 Difference]: Without dead ends: 1511 [2021-06-05 06:15:01,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-06-05 06:15:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1483. [2021-06-05 06:15:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 4.582321187584346) internal successors, (6791), 1482 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 6791 transitions. [2021-06-05 06:15:01,810 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 6791 transitions. Word has length 27 [2021-06-05 06:15:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:01,810 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 6791 transitions. [2021-06-05 06:15:01,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 6791 transitions. [2021-06-05 06:15:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:01,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:01,812 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:02,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:02,012 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:02,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1070450466, now seen corresponding path program 138 times [2021-06-05 06:15:02,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:02,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322883646] [2021-06-05 06:15:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322883646] [2021-06-05 06:15:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322883646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589290274] [2021-06-05 06:15:02,135 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 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 06:15:02,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:15:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:02,755 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 7 treesize of output 3 [2021-06-05 06:15:02,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:02,772 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 7 treesize of output 3 [2021-06-05 06:15:02,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:02,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:02,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:15:02,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-06-05 06:15:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:02,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589290274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:02,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:02,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 06:15:02,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510870764] [2021-06-05 06:15:02,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:15:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:15:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:15:02,838 INFO L87 Difference]: Start difference. First operand 1483 states and 6791 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:03,285 INFO L93 Difference]: Finished difference Result 2432 states and 10217 transitions. [2021-06-05 06:15:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:15:03,285 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:03,289 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 06:15:03,290 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 06:15:03,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:15:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 06:15:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1620. [2021-06-05 06:15:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.625077208153181) internal successors, (7488), 1619 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7488 transitions. [2021-06-05 06:15:03,314 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7488 transitions. Word has length 27 [2021-06-05 06:15:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 7488 transitions. [2021-06-05 06:15:03,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7488 transitions. [2021-06-05 06:15:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:03,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:03,316 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:03,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 06:15:03,516 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash 175326052, now seen corresponding path program 139 times [2021-06-05 06:15:03,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:03,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769987869] [2021-06-05 06:15:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:03,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:03,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769987869] [2021-06-05 06:15:03,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769987869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:03,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096268875] [2021-06-05 06:15:03,689 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 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 06:15:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:15:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096268875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:04,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:04,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:15:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25653724] [2021-06-05 06:15:04,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:15:04,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:15:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:04,382 INFO L87 Difference]: Start difference. First operand 1620 states and 7488 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:04,910 INFO L93 Difference]: Finished difference Result 1647 states and 7547 transitions. [2021-06-05 06:15:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:04,913 INFO L225 Difference]: With dead ends: 1647 [2021-06-05 06:15:04,913 INFO L226 Difference]: Without dead ends: 1633 [2021-06-05 06:15:04,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-05 06:15:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1612. [2021-06-05 06:15:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 4.631905648665425) internal successors, (7462), 1611 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 7462 transitions. [2021-06-05 06:15:04,933 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 7462 transitions. Word has length 27 [2021-06-05 06:15:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:04,933 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 7462 transitions. [2021-06-05 06:15:04,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 7462 transitions. [2021-06-05 06:15:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:04,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:04,936 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:05,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:05,136 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash -673296420, now seen corresponding path program 140 times [2021-06-05 06:15:05,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:05,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772955459] [2021-06-05 06:15:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:05,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:05,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772955459] [2021-06-05 06:15:05,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772955459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:05,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713946568] [2021-06-05 06:15:05,405 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 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 06:15:05,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:05,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713946568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:05,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:05,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:15:05,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913990939] [2021-06-05 06:15:05,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:15:05,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:15:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:05,941 INFO L87 Difference]: Start difference. First operand 1612 states and 7462 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:06,428 INFO L93 Difference]: Finished difference Result 1632 states and 7497 transitions. [2021-06-05 06:15:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:06,431 INFO L225 Difference]: With dead ends: 1632 [2021-06-05 06:15:06,431 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 06:15:06,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:15:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 06:15:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1586. [2021-06-05 06:15:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 4.6574132492113565) internal successors, (7382), 1585 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 7382 transitions. [2021-06-05 06:15:06,454 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 7382 transitions. Word has length 27 [2021-06-05 06:15:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:06,454 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 7382 transitions. [2021-06-05 06:15:06,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 7382 transitions. [2021-06-05 06:15:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:06,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:06,457 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:06,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:06,658 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1068054097, now seen corresponding path program 141 times [2021-06-05 06:15:06,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:06,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879782556] [2021-06-05 06:15:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:06,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879782556] [2021-06-05 06:15:06,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879782556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413088480] [2021-06-05 06:15:06,860 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 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 06:15:06,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:15:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:15:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:07,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413088480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:07,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:07,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:07,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795707730] [2021-06-05 06:15:07,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:07,756 INFO L87 Difference]: Start difference. First operand 1586 states and 7382 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:08,340 INFO L93 Difference]: Finished difference Result 1626 states and 7470 transitions. [2021-06-05 06:15:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:08,343 INFO L225 Difference]: With dead ends: 1626 [2021-06-05 06:15:08,343 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 06:15:08,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1286.7ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:15:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 06:15:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1600. [2021-06-05 06:15:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 4.632895559724828) internal successors, (7408), 1599 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 7408 transitions. [2021-06-05 06:15:08,363 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 7408 transitions. Word has length 28 [2021-06-05 06:15:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:08,363 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 7408 transitions. [2021-06-05 06:15:08,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 7408 transitions. [2021-06-05 06:15:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:08,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:08,365 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:08,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:08,565 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1313380425, now seen corresponding path program 142 times [2021-06-05 06:15:08,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:08,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146453351] [2021-06-05 06:15:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:08,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146453351] [2021-06-05 06:15:08,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146453351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500174602] [2021-06-05 06:15:08,868 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 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 06:15:08,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:09,402 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:09,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500174602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:09,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:09,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:09,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767630420] [2021-06-05 06:15:09,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:09,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:09,696 INFO L87 Difference]: Start difference. First operand 1600 states and 7408 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:10,258 INFO L93 Difference]: Finished difference Result 1634 states and 7482 transitions. [2021-06-05 06:15:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:10,261 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 06:15:10,261 INFO L226 Difference]: Without dead ends: 1630 [2021-06-05 06:15:10,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1279.3ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:15:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-05 06:15:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1604. [2021-06-05 06:15:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 4.625077978789769) internal successors, (7414), 1603 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 7414 transitions. [2021-06-05 06:15:10,281 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 7414 transitions. Word has length 28 [2021-06-05 06:15:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:10,281 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 7414 transitions. [2021-06-05 06:15:10,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 7414 transitions. [2021-06-05 06:15:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:10,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:10,283 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:10,484 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 775887569, now seen corresponding path program 143 times [2021-06-05 06:15:10,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:10,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080451820] [2021-06-05 06:15:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:10,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:10,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080451820] [2021-06-05 06:15:10,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080451820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:10,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36617299] [2021-06-05 06:15:10,716 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 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 06:15:10,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:15:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:11,236 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:11,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36617299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:11,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:11,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042043325] [2021-06-05 06:15:11,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:11,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:11,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:11,683 INFO L87 Difference]: Start difference. First operand 1604 states and 7414 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:12,144 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-06-05 06:15:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:15:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:12,147 INFO L225 Difference]: With dead ends: 1651 [2021-06-05 06:15:12,147 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 06:15:12,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1156.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:15:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 06:15:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1616. [2021-06-05 06:15:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 4.610526315789474) internal successors, (7446), 1615 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 7446 transitions. [2021-06-05 06:15:12,167 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 7446 transitions. Word has length 28 [2021-06-05 06:15:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:12,167 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 7446 transitions. [2021-06-05 06:15:12,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 7446 transitions. [2021-06-05 06:15:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:12,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:12,169 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:12,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 06:15:12,370 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:12,370 INFO L82 PathProgramCache]: Analyzing trace with hash -72733363, now seen corresponding path program 144 times [2021-06-05 06:15:12,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:12,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967455457] [2021-06-05 06:15:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:12,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:12,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967455457] [2021-06-05 06:15:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967455457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142326506] [2021-06-05 06:15:12,585 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 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 06:15:12,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:15:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:12,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:13,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142326506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:13,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:13,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:13,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886420564] [2021-06-05 06:15:13,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:13,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:13,303 INFO L87 Difference]: Start difference. First operand 1616 states and 7446 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:14,158 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-06-05 06:15:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:14,161 INFO L225 Difference]: With dead ends: 1651 [2021-06-05 06:15:14,161 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 06:15:14,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1355.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:15:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 06:15:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1617. [2021-06-05 06:15:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.608292079207921) internal successors, (7447), 1616 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7447 transitions. [2021-06-05 06:15:14,181 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7447 transitions. Word has length 28 [2021-06-05 06:15:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:14,181 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7447 transitions. [2021-06-05 06:15:14,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7447 transitions. [2021-06-05 06:15:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:14,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:14,183 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:14,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 06:15:14,383 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655091, now seen corresponding path program 145 times [2021-06-05 06:15:14,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:14,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714807895] [2021-06-05 06:15:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:14,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:14,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714807895] [2021-06-05 06:15:14,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714807895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:14,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004585870] [2021-06-05 06:15:14,671 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 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 06:15:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:15,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004585870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:15,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:15,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:15,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828890687] [2021-06-05 06:15:15,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:15,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:15,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:15,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:15,377 INFO L87 Difference]: Start difference. First operand 1617 states and 7447 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:15,861 INFO L93 Difference]: Finished difference Result 1661 states and 7546 transitions. [2021-06-05 06:15:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:15:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:15,864 INFO L225 Difference]: With dead ends: 1661 [2021-06-05 06:15:15,864 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 06:15:15,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1121.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:15:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 06:15:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1613. [2021-06-05 06:15:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.61166253101737) internal successors, (7434), 1612 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 7434 transitions. [2021-06-05 06:15:15,884 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 7434 transitions. Word has length 28 [2021-06-05 06:15:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:15,884 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 7434 transitions. [2021-06-05 06:15:15,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 7434 transitions. [2021-06-05 06:15:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:15,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:15,886 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:16,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 06:15:16,087 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1997787763, now seen corresponding path program 146 times [2021-06-05 06:15:16,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:16,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87300605] [2021-06-05 06:15:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:16,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:16,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87300605] [2021-06-05 06:15:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87300605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:16,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813831959] [2021-06-05 06:15:16,304 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 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 06:15:16,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:16,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:16,809 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 06:15:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:17,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813831959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:17,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:17,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:17,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109358253] [2021-06-05 06:15:17,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:17,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:17,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:17,177 INFO L87 Difference]: Start difference. First operand 1613 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:17,649 INFO L93 Difference]: Finished difference Result 1648 states and 7509 transitions. [2021-06-05 06:15:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:17,652 INFO L225 Difference]: With dead ends: 1648 [2021-06-05 06:15:17,652 INFO L226 Difference]: Without dead ends: 1644 [2021-06-05 06:15:17,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1162.9ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:15:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-06-05 06:15:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1618. [2021-06-05 06:15:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.6017316017316015) internal successors, (7441), 1617 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7441 transitions. [2021-06-05 06:15:17,672 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7441 transitions. Word has length 28 [2021-06-05 06:15:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:17,672 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7441 transitions. [2021-06-05 06:15:17,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7441 transitions. [2021-06-05 06:15:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:17,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:17,674 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:17,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:17,875 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2038384209, now seen corresponding path program 147 times [2021-06-05 06:15:17,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:17,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665537126] [2021-06-05 06:15:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:18,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:18,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665537126] [2021-06-05 06:15:18,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665537126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:18,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417050431] [2021-06-05 06:15:18,059 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 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 06:15:18,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:15:18,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:15:18,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:18,481 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 06:15:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:18,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417050431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:18,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:18,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:18,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510030780] [2021-06-05 06:15:18,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:18,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:18,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:18,821 INFO L87 Difference]: Start difference. First operand 1618 states and 7441 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:19,255 INFO L93 Difference]: Finished difference Result 1653 states and 7516 transitions. [2021-06-05 06:15:19,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:19,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:19,258 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 06:15:19,258 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 06:15:19,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 945.6ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:15:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 06:15:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1617. [2021-06-05 06:15:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.600866336633663) internal successors, (7435), 1616 states have internal predecessors, (7435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7435 transitions. [2021-06-05 06:15:19,279 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7435 transitions. Word has length 28 [2021-06-05 06:15:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:19,279 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7435 transitions. [2021-06-05 06:15:19,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7435 transitions. [2021-06-05 06:15:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:19,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:19,281 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:19,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:19,482 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash 232467601, now seen corresponding path program 148 times [2021-06-05 06:15:19,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:19,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459084826] [2021-06-05 06:15:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:19,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:19,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459084826] [2021-06-05 06:15:19,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459084826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:19,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812854038] [2021-06-05 06:15:19,705 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 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 06:15:19,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:19,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812854038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:20,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:20,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:20,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855375361] [2021-06-05 06:15:20,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:20,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:20,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:20,447 INFO L87 Difference]: Start difference. First operand 1617 states and 7435 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:20,867 INFO L93 Difference]: Finished difference Result 1656 states and 7522 transitions. [2021-06-05 06:15:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:20,870 INFO L225 Difference]: With dead ends: 1656 [2021-06-05 06:15:20,870 INFO L226 Difference]: Without dead ends: 1652 [2021-06-05 06:15:20,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:15:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-06-05 06:15:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1622. [2021-06-05 06:15:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.592227020357804) internal successors, (7444), 1621 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7444 transitions. [2021-06-05 06:15:20,890 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7444 transitions. Word has length 28 [2021-06-05 06:15:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:20,890 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7444 transitions. [2021-06-05 06:15:20,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7444 transitions. [2021-06-05 06:15:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:20,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:20,892 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:21,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 06:15:21,094 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1971856055, now seen corresponding path program 149 times [2021-06-05 06:15:21,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:21,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760850016] [2021-06-05 06:15:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:21,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760850016] [2021-06-05 06:15:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760850016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932007523] [2021-06-05 06:15:21,288 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 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 06:15:21,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:15:21,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:21,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:21,741 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 06:15:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:22,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932007523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:22,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:22,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:22,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815332113] [2021-06-05 06:15:22,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:22,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:22,168 INFO L87 Difference]: Start difference. First operand 1622 states and 7444 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:22,446 INFO L93 Difference]: Finished difference Result 1668 states and 7554 transitions. [2021-06-05 06:15:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:22,449 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 06:15:22,449 INFO L226 Difference]: Without dead ends: 1664 [2021-06-05 06:15:22,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 973.3ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-06-05 06:15:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1632. [2021-06-05 06:15:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 4.58185162477008) internal successors, (7473), 1631 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 7473 transitions. [2021-06-05 06:15:22,470 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 7473 transitions. Word has length 28 [2021-06-05 06:15:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:22,470 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 7473 transitions. [2021-06-05 06:15:22,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 7473 transitions. [2021-06-05 06:15:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:22,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:22,472 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:22,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:22,681 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:22,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:22,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1991978569, now seen corresponding path program 150 times [2021-06-05 06:15:22,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:22,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914166221] [2021-06-05 06:15:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:22,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:22,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914166221] [2021-06-05 06:15:22,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914166221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:22,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504792075] [2021-06-05 06:15:22,898 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 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 06:15:22,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:15:22,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:23,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504792075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:23,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:23,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:23,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176275906] [2021-06-05 06:15:23,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:23,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:23,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:23,572 INFO L87 Difference]: Start difference. First operand 1632 states and 7473 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:23,939 INFO L93 Difference]: Finished difference Result 1671 states and 7560 transitions. [2021-06-05 06:15:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:23,942 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 06:15:23,942 INFO L226 Difference]: Without dead ends: 1667 [2021-06-05 06:15:23,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 903.2ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-06-05 06:15:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1636. [2021-06-05 06:15:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 4.575535168195719) internal successors, (7481), 1635 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 7481 transitions. [2021-06-05 06:15:23,962 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 7481 transitions. Word has length 28 [2021-06-05 06:15:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:23,962 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 7481 transitions. [2021-06-05 06:15:23,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 7481 transitions. [2021-06-05 06:15:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:23,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:23,965 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:24,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 06:15:24,165 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1733183245, now seen corresponding path program 151 times [2021-06-05 06:15:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:24,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934122899] [2021-06-05 06:15:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:24,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934122899] [2021-06-05 06:15:24,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934122899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:24,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566022057] [2021-06-05 06:15:24,367 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 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 06:15:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566022057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:24,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:24,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:24,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145234659] [2021-06-05 06:15:24,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:24,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:24,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:24,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:24,984 INFO L87 Difference]: Start difference. First operand 1636 states and 7481 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:25,363 INFO L93 Difference]: Finished difference Result 1674 states and 7564 transitions. [2021-06-05 06:15:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:25,363 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:25,366 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 06:15:25,366 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 06:15:25,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 06:15:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1627. [2021-06-05 06:15:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 4.583640836408364) internal successors, (7453), 1626 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 7453 transitions. [2021-06-05 06:15:25,386 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 7453 transitions. Word has length 28 [2021-06-05 06:15:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:25,386 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 7453 transitions. [2021-06-05 06:15:25,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 7453 transitions. [2021-06-05 06:15:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:25,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:25,389 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:25,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:25,589 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1830495825, now seen corresponding path program 152 times [2021-06-05 06:15:25,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:25,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242571123] [2021-06-05 06:15:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:25,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242571123] [2021-06-05 06:15:25,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242571123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:25,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595589931] [2021-06-05 06:15:25,846 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 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 06:15:25,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:15:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:26,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595589931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:26,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:26,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610636268] [2021-06-05 06:15:26,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:26,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:26,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:26,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:26,721 INFO L87 Difference]: Start difference. First operand 1627 states and 7453 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:27,288 INFO L93 Difference]: Finished difference Result 1665 states and 7539 transitions. [2021-06-05 06:15:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:27,291 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 06:15:27,291 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 06:15:27,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1343.1ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:15:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 06:15:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1631. [2021-06-05 06:15:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 4.5773006134969325) internal successors, (7461), 1630 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 7461 transitions. [2021-06-05 06:15:27,311 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 7461 transitions. Word has length 28 [2021-06-05 06:15:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:27,312 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 7461 transitions. [2021-06-05 06:15:27,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 7461 transitions. [2021-06-05 06:15:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:27,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:27,314 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:27,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:27,514 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:27,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191923, now seen corresponding path program 153 times [2021-06-05 06:15:27,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:27,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886366007] [2021-06-05 06:15:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886366007] [2021-06-05 06:15:27,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886366007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123177812] [2021-06-05 06:15:27,778 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 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 06:15:27,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:15:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:27,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:28,306 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:28,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123177812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:28,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:28,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391048519] [2021-06-05 06:15:28,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:28,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:28,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:28,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:28,636 INFO L87 Difference]: Start difference. First operand 1631 states and 7461 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:29,348 INFO L93 Difference]: Finished difference Result 1696 states and 7604 transitions. [2021-06-05 06:15:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:15:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:29,351 INFO L225 Difference]: With dead ends: 1696 [2021-06-05 06:15:29,351 INFO L226 Difference]: Without dead ends: 1692 [2021-06-05 06:15:29,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1412.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:15:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-06-05 06:15:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1622. [2021-06-05 06:15:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.586057988895743) internal successors, (7434), 1621 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7434 transitions. [2021-06-05 06:15:29,371 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7434 transitions. Word has length 28 [2021-06-05 06:15:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:29,371 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7434 transitions. [2021-06-05 06:15:29,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7434 transitions. [2021-06-05 06:15:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:29,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:29,373 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:29,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-05 06:15:29,574 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:29,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2138980049, now seen corresponding path program 154 times [2021-06-05 06:15:29,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:29,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507479766] [2021-06-05 06:15:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:29,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:29,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507479766] [2021-06-05 06:15:29,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507479766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:29,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802797394] [2021-06-05 06:15:29,806 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 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 06:15:29,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:29,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:29,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:30,316 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802797394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:30,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:30,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592144778] [2021-06-05 06:15:30,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:30,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:30,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:30,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:30,715 INFO L87 Difference]: Start difference. First operand 1622 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:31,309 INFO L93 Difference]: Finished difference Result 1654 states and 7498 transitions. [2021-06-05 06:15:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:31,312 INFO L225 Difference]: With dead ends: 1654 [2021-06-05 06:15:31,312 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 06:15:31,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1289.4ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:15:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 06:15:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1618. [2021-06-05 06:15:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.587507730364873) internal successors, (7418), 1617 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7418 transitions. [2021-06-05 06:15:31,332 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7418 transitions. Word has length 28 [2021-06-05 06:15:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:31,332 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7418 transitions. [2021-06-05 06:15:31,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7418 transitions. [2021-06-05 06:15:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:31,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:31,334 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:31,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,535 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:31,535 INFO L82 PathProgramCache]: Analyzing trace with hash -196758805, now seen corresponding path program 155 times [2021-06-05 06:15:31,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:31,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76152185] [2021-06-05 06:15:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:31,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:31,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76152185] [2021-06-05 06:15:31,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76152185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:31,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440290667] [2021-06-05 06:15:31,704 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 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 06:15:31,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:15:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:32,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440290667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:32,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:32,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625226289] [2021-06-05 06:15:32,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:32,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:32,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:32,595 INFO L87 Difference]: Start difference. First operand 1618 states and 7418 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:32,801 INFO L93 Difference]: Finished difference Result 1650 states and 7490 transitions. [2021-06-05 06:15:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:15:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:32,804 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 06:15:32,804 INFO L226 Difference]: Without dead ends: 1646 [2021-06-05 06:15:32,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-05 06:15:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1610. [2021-06-05 06:15:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 4.599129894344313) internal successors, (7400), 1609 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 7400 transitions. [2021-06-05 06:15:32,825 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 7400 transitions. Word has length 28 [2021-06-05 06:15:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:32,825 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 7400 transitions. [2021-06-05 06:15:32,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 7400 transitions. [2021-06-05 06:15:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:32,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:32,827 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:33,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 06:15:33,028 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1332363625, now seen corresponding path program 156 times [2021-06-05 06:15:33,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:33,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623443040] [2021-06-05 06:15:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:33,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623443040] [2021-06-05 06:15:33,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623443040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276557734] [2021-06-05 06:15:33,174 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 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 06:15:33,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:15:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:15:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:33,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276557734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:33,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:15:33,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160019700] [2021-06-05 06:15:33,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:15:33,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:15:33,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:33,844 INFO L87 Difference]: Start difference. First operand 1610 states and 7400 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:34,152 INFO L93 Difference]: Finished difference Result 1574 states and 7191 transitions. [2021-06-05 06:15:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:34,155 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 06:15:34,155 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 06:15:34,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 752.0ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:15:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 06:15:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1531. [2021-06-05 06:15:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 4.633986928104576) internal successors, (7090), 1530 states have internal predecessors, (7090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 7090 transitions. [2021-06-05 06:15:34,174 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 7090 transitions. Word has length 28 [2021-06-05 06:15:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:34,174 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 7090 transitions. [2021-06-05 06:15:34,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 7090 transitions. [2021-06-05 06:15:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:34,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:34,176 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:34,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 06:15:34,377 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2110291579, now seen corresponding path program 157 times [2021-06-05 06:15:34,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:34,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869797797] [2021-06-05 06:15:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:34,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:34,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869797797] [2021-06-05 06:15:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869797797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:34,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591983479] [2021-06-05 06:15:34,623 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 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 06:15:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:34,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:35,146 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:35,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591983479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:35,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:35,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742213237] [2021-06-05 06:15:35,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:35,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:35,510 INFO L87 Difference]: Start difference. First operand 1531 states and 7090 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:36,346 INFO L93 Difference]: Finished difference Result 1578 states and 7201 transitions. [2021-06-05 06:15:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:36,346 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:36,349 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 06:15:36,349 INFO L226 Difference]: Without dead ends: 1574 [2021-06-05 06:15:36,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1505.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:15:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-06-05 06:15:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1538. [2021-06-05 06:15:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 4.62654521795706) internal successors, (7111), 1537 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 7111 transitions. [2021-06-05 06:15:36,369 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 7111 transitions. Word has length 28 [2021-06-05 06:15:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:36,369 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 7111 transitions. [2021-06-05 06:15:36,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 7111 transitions. [2021-06-05 06:15:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:36,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:36,371 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:36,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 06:15:36,571 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:36,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1647182861, now seen corresponding path program 158 times [2021-06-05 06:15:36,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:36,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903765806] [2021-06-05 06:15:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:36,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:36,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903765806] [2021-06-05 06:15:36,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903765806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:36,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426488832] [2021-06-05 06:15:36,815 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 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 06:15:36,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:15:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:37,359 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:37,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426488832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:37,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:37,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204799067] [2021-06-05 06:15:37,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:37,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:37,832 INFO L87 Difference]: Start difference. First operand 1538 states and 7111 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:38,819 INFO L93 Difference]: Finished difference Result 1586 states and 7223 transitions. [2021-06-05 06:15:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:15:38,819 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:38,821 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 06:15:38,822 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 06:15:38,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1731.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:15:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 06:15:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1544. [2021-06-05 06:15:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 4.620868438107583) internal successors, (7130), 1543 states have internal predecessors, (7130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 7130 transitions. [2021-06-05 06:15:38,841 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 7130 transitions. Word has length 28 [2021-06-05 06:15:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:38,842 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 7130 transitions. [2021-06-05 06:15:38,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 7130 transitions. [2021-06-05 06:15:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:38,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:38,844 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:39,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 06:15:39,044 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash -53750163, now seen corresponding path program 159 times [2021-06-05 06:15:39,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:39,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185678334] [2021-06-05 06:15:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:39,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:39,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185678334] [2021-06-05 06:15:39,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185678334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19295872] [2021-06-05 06:15:39,192 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 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 06:15:39,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:15:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:15:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:39,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19295872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:39,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:15:39,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25860162] [2021-06-05 06:15:39,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:15:39,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:15:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:15:39,720 INFO L87 Difference]: Start difference. First operand 1544 states and 7130 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:40,138 INFO L93 Difference]: Finished difference Result 1511 states and 6853 transitions. [2021-06-05 06:15:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:40,140 INFO L225 Difference]: With dead ends: 1511 [2021-06-05 06:15:40,140 INFO L226 Difference]: Without dead ends: 1493 [2021-06-05 06:15:40,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 769.8ms TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-05 06:15:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1466. [2021-06-05 06:15:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-06-05 06:15:40,159 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-06-05 06:15:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:40,159 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-06-05 06:15:40,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-06-05 06:15:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:40,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:40,161 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:40,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:40,361 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash 798561929, now seen corresponding path program 160 times [2021-06-05 06:15:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:40,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793497040] [2021-06-05 06:15:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:40,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:40,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793497040] [2021-06-05 06:15:40,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793497040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:40,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183725718] [2021-06-05 06:15:40,543 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 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 06:15:40,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:40,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183725718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:41,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:41,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601407149] [2021-06-05 06:15:41,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:41,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:41,174 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:41,422 INFO L93 Difference]: Finished difference Result 1512 states and 6853 transitions. [2021-06-05 06:15:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:41,425 INFO L225 Difference]: With dead ends: 1512 [2021-06-05 06:15:41,425 INFO L226 Difference]: Without dead ends: 1508 [2021-06-05 06:15:41,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 709.6ms TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-06-05 06:15:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1468. [2021-06-05 06:15:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 4.5998636673483295) internal successors, (6748), 1467 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 6748 transitions. [2021-06-05 06:15:41,442 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 6748 transitions. Word has length 28 [2021-06-05 06:15:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:41,443 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 6748 transitions. [2021-06-05 06:15:41,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 6748 transitions. [2021-06-05 06:15:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:41,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:41,445 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:41,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:41,645 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1757016913, now seen corresponding path program 161 times [2021-06-05 06:15:41,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:41,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355433654] [2021-06-05 06:15:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:41,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355433654] [2021-06-05 06:15:41,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355433654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441893929] [2021-06-05 06:15:41,839 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 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 06:15:41,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:15:41,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:42,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441893929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:42,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:42,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:42,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885172645] [2021-06-05 06:15:42,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:42,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:42,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:42,624 INFO L87 Difference]: Start difference. First operand 1468 states and 6748 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:42,975 INFO L93 Difference]: Finished difference Result 1517 states and 6862 transitions. [2021-06-05 06:15:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:42,976 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:42,978 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 06:15:42,978 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 06:15:42,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 973.9ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 06:15:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-06-05 06:15:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-06-05 06:15:43,005 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-06-05 06:15:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:43,005 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-06-05 06:15:43,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-06-05 06:15:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:43,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:43,007 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:43,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:43,207 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884241, now seen corresponding path program 162 times [2021-06-05 06:15:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786070411] [2021-06-05 06:15:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:43,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:43,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786070411] [2021-06-05 06:15:43,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786070411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:43,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627416218] [2021-06-05 06:15:43,428 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 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 06:15:43,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:15:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627416218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:44,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:44,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:44,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627841640] [2021-06-05 06:15:44,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:44,081 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:44,676 INFO L93 Difference]: Finished difference Result 1519 states and 6864 transitions. [2021-06-05 06:15:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:15:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:44,679 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 06:15:44,679 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 06:15:44,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1142.7ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:15:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 06:15:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1466. [2021-06-05 06:15:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-06-05 06:15:44,697 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-06-05 06:15:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:44,698 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-06-05 06:15:44,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-06-05 06:15:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:44,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:44,700 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:44,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:44,900 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:44,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1167088917, now seen corresponding path program 163 times [2021-06-05 06:15:44,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:44,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537233562] [2021-06-05 06:15:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537233562] [2021-06-05 06:15:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537233562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382205655] [2021-06-05 06:15:45,082 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 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 06:15:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:45,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382205655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:45,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:45,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765950446] [2021-06-05 06:15:45,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:45,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:45,974 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:46,378 INFO L93 Difference]: Finished difference Result 1517 states and 6858 transitions. [2021-06-05 06:15:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:46,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:46,381 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 06:15:46,381 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 06:15:46,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1076.2ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:15:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 06:15:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-06-05 06:15:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-06-05 06:15:46,399 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-06-05 06:15:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:46,399 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-06-05 06:15:46,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-06-05 06:15:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:46,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:46,401 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:46,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:46,602 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1768583857, now seen corresponding path program 164 times [2021-06-05 06:15:46,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:46,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17245150] [2021-06-05 06:15:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:46,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17245150] [2021-06-05 06:15:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17245150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055203156] [2021-06-05 06:15:46,823 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 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 06:15:46,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:46,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:46,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:15:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055203156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 06:15:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74363569] [2021-06-05 06:15:47,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:15:47,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:15:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:15:47,450 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:47,951 INFO L93 Difference]: Finished difference Result 1192 states and 5241 transitions. [2021-06-05 06:15:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:47,953 INFO L225 Difference]: With dead ends: 1192 [2021-06-05 06:15:47,953 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 06:15:47,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 965.8ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:15:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 06:15:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1151. [2021-06-05 06:15:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 4.472173913043478) internal successors, (5143), 1150 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 5143 transitions. [2021-06-05 06:15:47,968 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 5143 transitions. Word has length 28 [2021-06-05 06:15:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:47,968 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 5143 transitions. [2021-06-05 06:15:47,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 5143 transitions. [2021-06-05 06:15:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:47,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:47,969 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:48,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:48,170 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:48,170 INFO L82 PathProgramCache]: Analyzing trace with hash 108442159, now seen corresponding path program 165 times [2021-06-05 06:15:48,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:48,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230445639] [2021-06-05 06:15:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:48,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:48,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230445639] [2021-06-05 06:15:48,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230445639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:48,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532161727] [2021-06-05 06:15:48,493 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 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 06:15:48,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:15:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:15:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:49,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532161727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:49,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:49,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:49,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087898453] [2021-06-05 06:15:49,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:49,542 INFO L87 Difference]: Start difference. First operand 1151 states and 5143 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,122 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 06:15:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:50,222 INFO L93 Difference]: Finished difference Result 1185 states and 5217 transitions. [2021-06-05 06:15:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:50,222 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:50,224 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 06:15:50,224 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 06:15:50,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1582.0ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:15:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 06:15:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1145. [2021-06-05 06:15:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 4.481643356643357) internal successors, (5127), 1144 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 5127 transitions. [2021-06-05 06:15:50,247 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 5127 transitions. Word has length 28 [2021-06-05 06:15:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:50,247 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 5127 transitions. [2021-06-05 06:15:50,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 5127 transitions. [2021-06-05 06:15:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:50,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:50,249 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:50,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:50,449 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1805090615, now seen corresponding path program 166 times [2021-06-05 06:15:50,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:50,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110838008] [2021-06-05 06:15:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:50,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:50,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110838008] [2021-06-05 06:15:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110838008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:50,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352705186] [2021-06-05 06:15:50,653 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 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 06:15:50,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:50,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:50,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:50,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:51,208 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:51,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352705186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:51,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:51,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:15:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429866523] [2021-06-05 06:15:51,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:15:51,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:15:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:51,550 INFO L87 Difference]: Start difference. First operand 1145 states and 5127 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:52,044 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 06:15:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:52,146 INFO L93 Difference]: Finished difference Result 1180 states and 5202 transitions. [2021-06-05 06:15:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:52,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:52,148 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 06:15:52,148 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 06:15:52,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1300.7ms TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:15:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 06:15:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2021-06-05 06:15:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 4.493827160493828) internal successors, (5096), 1134 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 5096 transitions. [2021-06-05 06:15:52,161 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 5096 transitions. Word has length 28 [2021-06-05 06:15:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:52,161 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 5096 transitions. [2021-06-05 06:15:52,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 5096 transitions. [2021-06-05 06:15:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:15:52,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:52,163 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:52,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:52,363 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1952383825, now seen corresponding path program 167 times [2021-06-05 06:15:52,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:52,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420858738] [2021-06-05 06:15:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:52,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420858738] [2021-06-05 06:15:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420858738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902799438] [2021-06-05 06:15:52,598 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 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 06:15:52,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:15:52,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:52,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:15:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:53,223 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:15:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902799438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:53,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:53,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:15:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487140329] [2021-06-05 06:15:53,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:15:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:15:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:53,641 INFO L87 Difference]: Start difference. First operand 1135 states and 5096 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:54,297 INFO L93 Difference]: Finished difference Result 1168 states and 5162 transitions. [2021-06-05 06:15:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:15:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:15:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:54,299 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 06:15:54,299 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 06:15:54,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1441.9ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:15:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 06:15:54,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1112. [2021-06-05 06:15:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 4.53015301530153) internal successors, (5033), 1111 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 5033 transitions. [2021-06-05 06:15:54,312 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 5033 transitions. Word has length 28 [2021-06-05 06:15:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:54,312 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 5033 transitions. [2021-06-05 06:15:54,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 5033 transitions. [2021-06-05 06:15:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:15:54,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:54,314 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:54,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 06:15:54,514 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:54,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1451861432, now seen corresponding path program 168 times [2021-06-05 06:15:54,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:54,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043462382] [2021-06-05 06:15:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:15:54,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:54,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043462382] [2021-06-05 06:15:54,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043462382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:54,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366566261] [2021-06-05 06:15:54,661 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 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 06:15:54,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:15:54,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:54,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:15:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:55,014 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 7 treesize of output 3 [2021-06-05 06:15:55,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,051 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 7 treesize of output 3 [2021-06-05 06:15:55,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,087 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 7 treesize of output 3 [2021-06-05 06:15:55,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,122 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 7 treesize of output 3 [2021-06-05 06:15:55,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:55,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:55,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:15:55,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:123, output treesize:95 [2021-06-05 06:15:55,490 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 06:16:11,602 WARN L205 SmtUtils]: Spent 16.06 s on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 06:16:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:16:11,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366566261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:11,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:11,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 06:16:11,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066675721] [2021-06-05 06:16:11,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:16:11,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:16:11,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:11,616 INFO L87 Difference]: Start difference. First operand 1112 states and 5033 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:13,940 INFO L93 Difference]: Finished difference Result 2488 states and 10938 transitions. [2021-06-05 06:16:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:16:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:13,944 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 06:16:13,944 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 06:16:13,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 16776.9ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:16:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 06:16:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1684. [2021-06-05 06:16:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 4.7260843731431965) internal successors, (7954), 1683 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 7954 transitions. [2021-06-05 06:16:13,969 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 7954 transitions. Word has length 29 [2021-06-05 06:16:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:13,969 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 7954 transitions. [2021-06-05 06:16:13,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 7954 transitions. [2021-06-05 06:16:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:13,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:13,971 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:14,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 06:16:14,172 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash -462072546, now seen corresponding path program 169 times [2021-06-05 06:16:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:14,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058440387] [2021-06-05 06:16:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:14,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:14,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058440387] [2021-06-05 06:16:14,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058440387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:14,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136899311] [2021-06-05 06:16:14,432 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 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 06:16:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:16:14,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:15,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136899311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:15,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:15,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:15,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311387457] [2021-06-05 06:16:15,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:15,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:15,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:15,263 INFO L87 Difference]: Start difference. First operand 1684 states and 7954 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:15,551 INFO L93 Difference]: Finished difference Result 1831 states and 8338 transitions. [2021-06-05 06:16:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:16:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:15,554 INFO L225 Difference]: With dead ends: 1831 [2021-06-05 06:16:15,554 INFO L226 Difference]: Without dead ends: 1814 [2021-06-05 06:16:15,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:16:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-06-05 06:16:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1728. [2021-06-05 06:16:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 4.672264041690793) internal successors, (8069), 1727 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 8069 transitions. [2021-06-05 06:16:15,576 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 8069 transitions. Word has length 29 [2021-06-05 06:16:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:15,576 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 8069 transitions. [2021-06-05 06:16:15,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 8069 transitions. [2021-06-05 06:16:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:15,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:15,578 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:15,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-05 06:16:15,778 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash 347953604, now seen corresponding path program 170 times [2021-06-05 06:16:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:15,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230726838] [2021-06-05 06:16:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:16,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:16,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230726838] [2021-06-05 06:16:16,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230726838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:16,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486183643] [2021-06-05 06:16:16,047 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 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 06:16:16,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:16:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:16,616 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 06:16:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486183643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859314930] [2021-06-05 06:16:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:17,038 INFO L87 Difference]: Start difference. First operand 1728 states and 8069 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:17,811 INFO L93 Difference]: Finished difference Result 1769 states and 8177 transitions. [2021-06-05 06:16:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:17,814 INFO L225 Difference]: With dead ends: 1769 [2021-06-05 06:16:17,814 INFO L226 Difference]: Without dead ends: 1762 [2021-06-05 06:16:17,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1569.6ms TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:16:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-06-05 06:16:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1751. [2021-06-05 06:16:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 4.646857142857143) internal successors, (8132), 1750 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 8132 transitions. [2021-06-05 06:16:17,837 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 8132 transitions. Word has length 29 [2021-06-05 06:16:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:17,837 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 8132 transitions. [2021-06-05 06:16:17,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 8132 transitions. [2021-06-05 06:16:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:17,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:17,839 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:18,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 06:16:18,040 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 865544252, now seen corresponding path program 171 times [2021-06-05 06:16:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:18,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457440456] [2021-06-05 06:16:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:18,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457440456] [2021-06-05 06:16:18,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457440456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360651557] [2021-06-05 06:16:18,387 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 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 06:16:18,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:16:18,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:19,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360651557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:19,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:19,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:19,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652483796] [2021-06-05 06:16:19,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:19,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:19,370 INFO L87 Difference]: Start difference. First operand 1751 states and 8132 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:20,248 INFO L93 Difference]: Finished difference Result 1810 states and 8279 transitions. [2021-06-05 06:16:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:16:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:20,252 INFO L225 Difference]: With dead ends: 1810 [2021-06-05 06:16:20,252 INFO L226 Difference]: Without dead ends: 1798 [2021-06-05 06:16:20,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1748.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:16:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-05 06:16:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1769. [2021-06-05 06:16:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 4.628393665158371) internal successors, (8183), 1768 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 8183 transitions. [2021-06-05 06:16:20,273 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 8183 transitions. Word has length 29 [2021-06-05 06:16:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:20,273 INFO L482 AbstractCegarLoop]: Abstraction has 1769 states and 8183 transitions. [2021-06-05 06:16:20,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 8183 transitions. [2021-06-05 06:16:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:20,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:20,276 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:20,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:20,476 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:20,476 INFO L82 PathProgramCache]: Analyzing trace with hash 328099136, now seen corresponding path program 172 times [2021-06-05 06:16:20,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:20,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264190708] [2021-06-05 06:16:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:20,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:20,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264190708] [2021-06-05 06:16:20,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264190708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:20,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822106693] [2021-06-05 06:16:20,786 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 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 06:16:20,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:20,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:20,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:16:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:21,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822106693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:21,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:21,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:21,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434819855] [2021-06-05 06:16:21,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:21,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:21,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:21,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:21,372 INFO L87 Difference]: Start difference. First operand 1769 states and 8183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:22,448 INFO L93 Difference]: Finished difference Result 2432 states and 10664 transitions. [2021-06-05 06:16:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:16:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:22,453 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 06:16:22,453 INFO L226 Difference]: Without dead ends: 2349 [2021-06-05 06:16:22,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1478.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:16:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-06-05 06:16:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1981. [2021-06-05 06:16:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 4.653030303030303) internal successors, (9213), 1980 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 9213 transitions. [2021-06-05 06:16:22,482 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 9213 transitions. Word has length 29 [2021-06-05 06:16:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:22,482 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 9213 transitions. [2021-06-05 06:16:22,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 9213 transitions. [2021-06-05 06:16:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:22,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:22,485 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:22,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:22,685 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1585433638, now seen corresponding path program 173 times [2021-06-05 06:16:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:22,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197980835] [2021-06-05 06:16:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:23,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197980835] [2021-06-05 06:16:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197980835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593113150] [2021-06-05 06:16:23,112 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 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 06:16:23,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:16:23,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:23,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593113150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:23,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:23,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:23,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057371590] [2021-06-05 06:16:23,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:23,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:23,912 INFO L87 Difference]: Start difference. First operand 1981 states and 9213 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:25,148 INFO L93 Difference]: Finished difference Result 2286 states and 10241 transitions. [2021-06-05 06:16:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:16:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:25,152 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 06:16:25,152 INFO L226 Difference]: Without dead ends: 2194 [2021-06-05 06:16:25,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1870.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:16:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-06-05 06:16:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2066. [2021-06-05 06:16:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.632445520581114) internal successors, (9566), 2065 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 9566 transitions. [2021-06-05 06:16:25,179 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 9566 transitions. Word has length 29 [2021-06-05 06:16:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:25,179 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 9566 transitions. [2021-06-05 06:16:25,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 9566 transitions. [2021-06-05 06:16:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:25,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:25,182 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:25,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:25,383 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:25,383 INFO L82 PathProgramCache]: Analyzing trace with hash 89744602, now seen corresponding path program 174 times [2021-06-05 06:16:25,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:25,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331466863] [2021-06-05 06:16:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:25,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331466863] [2021-06-05 06:16:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331466863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:25,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820555594] [2021-06-05 06:16:25,663 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 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 06:16:25,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:16:25,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:16:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:26,091 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 06:16:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:26,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820555594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:26,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:26,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555608258] [2021-06-05 06:16:26,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:26,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:26,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:26,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:26,426 INFO L87 Difference]: Start difference. First operand 2066 states and 9566 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:26,984 INFO L93 Difference]: Finished difference Result 2244 states and 10109 transitions. [2021-06-05 06:16:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:16:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:26,988 INFO L225 Difference]: With dead ends: 2244 [2021-06-05 06:16:26,988 INFO L226 Difference]: Without dead ends: 2232 [2021-06-05 06:16:26,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:16:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-05 06:16:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2102. [2021-06-05 06:16:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 4.627796287482151) internal successors, (9723), 2101 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 9723 transitions. [2021-06-05 06:16:27,015 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 9723 transitions. Word has length 29 [2021-06-05 06:16:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:27,015 INFO L482 AbstractCegarLoop]: Abstraction has 2102 states and 9723 transitions. [2021-06-05 06:16:27,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 9723 transitions. [2021-06-05 06:16:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:27,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:27,018 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:27,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 06:16:27,219 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash -477534946, now seen corresponding path program 175 times [2021-06-05 06:16:27,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:27,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337751095] [2021-06-05 06:16:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:27,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:27,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337751095] [2021-06-05 06:16:27,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337751095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:27,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43948100] [2021-06-05 06:16:27,495 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 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 06:16:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:27,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:16:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43948100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:28,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:28,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:28,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296383541] [2021-06-05 06:16:28,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:28,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:28,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:28,418 INFO L87 Difference]: Start difference. First operand 2102 states and 9723 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:29,452 INFO L93 Difference]: Finished difference Result 2144 states and 9820 transitions. [2021-06-05 06:16:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:16:29,452 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:29,456 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 06:16:29,456 INFO L226 Difference]: Without dead ends: 2132 [2021-06-05 06:16:29,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1757.8ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:16:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-06-05 06:16:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2103. [2021-06-05 06:16:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 4.627021883920076) internal successors, (9726), 2102 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 9726 transitions. [2021-06-05 06:16:29,482 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 9726 transitions. Word has length 29 [2021-06-05 06:16:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:29,482 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 9726 transitions. [2021-06-05 06:16:29,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 9726 transitions. [2021-06-05 06:16:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:29,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:29,485 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:29,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:29,685 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1199394428, now seen corresponding path program 176 times [2021-06-05 06:16:29,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:29,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519820743] [2021-06-05 06:16:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:29,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:29,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519820743] [2021-06-05 06:16:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519820743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535134250] [2021-06-05 06:16:29,928 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 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 06:16:29,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:29,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:16:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:30,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535134250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:30,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:30,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:30,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848038753] [2021-06-05 06:16:30,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:30,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:30,735 INFO L87 Difference]: Start difference. First operand 2103 states and 9726 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:31,246 INFO L93 Difference]: Finished difference Result 2149 states and 9838 transitions. [2021-06-05 06:16:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:31,250 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 06:16:31,250 INFO L226 Difference]: Without dead ends: 2142 [2021-06-05 06:16:31,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1114.3ms TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:16:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-06-05 06:16:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2114. [2021-06-05 06:16:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.613819214387127) internal successors, (9749), 2113 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9749 transitions. [2021-06-05 06:16:31,276 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9749 transitions. Word has length 29 [2021-06-05 06:16:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:31,276 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 9749 transitions. [2021-06-05 06:16:31,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9749 transitions. [2021-06-05 06:16:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:31,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:31,279 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:31,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 06:16:31,480 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -714138346, now seen corresponding path program 177 times [2021-06-05 06:16:31,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:31,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648515142] [2021-06-05 06:16:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:31,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:31,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648515142] [2021-06-05 06:16:31,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648515142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:31,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244094790] [2021-06-05 06:16:31,814 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 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 06:16:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:16:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:16:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:32,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244094790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:32,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:32,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:32,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767757010] [2021-06-05 06:16:32,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:32,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:32,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:32,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:32,614 INFO L87 Difference]: Start difference. First operand 2114 states and 9749 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:33,877 INFO L93 Difference]: Finished difference Result 2362 states and 10569 transitions. [2021-06-05 06:16:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:16:33,878 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:33,882 INFO L225 Difference]: With dead ends: 2362 [2021-06-05 06:16:33,882 INFO L226 Difference]: Without dead ends: 2294 [2021-06-05 06:16:33,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1844.2ms TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:16:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-06-05 06:16:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2155. [2021-06-05 06:16:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 4.589136490250697) internal successors, (9885), 2154 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 9885 transitions. [2021-06-05 06:16:33,909 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 9885 transitions. Word has length 29 [2021-06-05 06:16:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:33,909 INFO L482 AbstractCegarLoop]: Abstraction has 2155 states and 9885 transitions. [2021-06-05 06:16:33,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 9885 transitions. [2021-06-05 06:16:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:33,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:33,912 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:34,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 06:16:34,113 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:34,113 INFO L82 PathProgramCache]: Analyzing trace with hash 961039894, now seen corresponding path program 178 times [2021-06-05 06:16:34,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:34,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468433943] [2021-06-05 06:16:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:34,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468433943] [2021-06-05 06:16:34,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468433943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106093074] [2021-06-05 06:16:34,387 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 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 06:16:34,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:34,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:34,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:16:34,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:35,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106093074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:35,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:35,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:35,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437082089] [2021-06-05 06:16:35,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:35,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:35,041 INFO L87 Difference]: Start difference. First operand 2155 states and 9885 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:35,326 INFO L93 Difference]: Finished difference Result 2204 states and 10013 transitions. [2021-06-05 06:16:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:35,330 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 06:16:35,330 INFO L226 Difference]: Without dead ends: 2197 [2021-06-05 06:16:35,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:16:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-06-05 06:16:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2167. [2021-06-05 06:16:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 4.577562326869806) internal successors, (9915), 2166 states have internal predecessors, (9915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 9915 transitions. [2021-06-05 06:16:35,357 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 9915 transitions. Word has length 29 [2021-06-05 06:16:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:35,357 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 9915 transitions. [2021-06-05 06:16:35,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 9915 transitions. [2021-06-05 06:16:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:35,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:35,360 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:35,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:35,561 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash 393760346, now seen corresponding path program 179 times [2021-06-05 06:16:35,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:35,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398965008] [2021-06-05 06:16:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:35,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:35,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398965008] [2021-06-05 06:16:35,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398965008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:35,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442094578] [2021-06-05 06:16:35,868 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 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 06:16:35,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:16:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:16:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:36,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442094578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:36,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:36,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:36,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971524] [2021-06-05 06:16:36,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:36,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:36,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:36,630 INFO L87 Difference]: Start difference. First operand 2167 states and 9915 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:37,355 INFO L93 Difference]: Finished difference Result 2306 states and 10326 transitions. [2021-06-05 06:16:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:16:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:37,359 INFO L225 Difference]: With dead ends: 2306 [2021-06-05 06:16:37,359 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 06:16:37,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1369.1ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:16:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 06:16:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2187. [2021-06-05 06:16:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 4.562671546203111) internal successors, (9974), 2186 states have internal predecessors, (9974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9974 transitions. [2021-06-05 06:16:37,388 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9974 transitions. Word has length 29 [2021-06-05 06:16:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:37,388 INFO L482 AbstractCegarLoop]: Abstraction has 2187 states and 9974 transitions. [2021-06-05 06:16:37,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9974 transitions. [2021-06-05 06:16:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:37,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:37,391 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:37,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable792 [2021-06-05 06:16:37,591 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1672037662, now seen corresponding path program 180 times [2021-06-05 06:16:37,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:37,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704612389] [2021-06-05 06:16:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:37,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704612389] [2021-06-05 06:16:37,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704612389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92474109] [2021-06-05 06:16:37,915 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 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 06:16:37,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:16:37,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:37,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:38,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92474109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:38,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:38,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537670373] [2021-06-05 06:16:38,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:38,768 INFO L87 Difference]: Start difference. First operand 2187 states and 9974 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:39,687 INFO L93 Difference]: Finished difference Result 2348 states and 10539 transitions. [2021-06-05 06:16:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:16:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:39,691 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 06:16:39,691 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 06:16:39,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1614.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:16:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 06:16:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2243. [2021-06-05 06:16:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 4.558876003568242) internal successors, (10221), 2242 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 10221 transitions. [2021-06-05 06:16:39,719 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 10221 transitions. Word has length 29 [2021-06-05 06:16:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:39,719 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 10221 transitions. [2021-06-05 06:16:39,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 10221 transitions. [2021-06-05 06:16:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:39,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:39,722 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:39,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 06:16:39,922 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1266240858, now seen corresponding path program 181 times [2021-06-05 06:16:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805666803] [2021-06-05 06:16:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:40,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:40,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805666803] [2021-06-05 06:16:40,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805666803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:40,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167488338] [2021-06-05 06:16:40,176 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 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 06:16:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:16:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:41,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167488338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:41,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:41,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:41,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965524951] [2021-06-05 06:16:41,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:41,068 INFO L87 Difference]: Start difference. First operand 2243 states and 10221 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:41,800 INFO L93 Difference]: Finished difference Result 2425 states and 10774 transitions. [2021-06-05 06:16:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:16:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:41,805 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 06:16:41,805 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 06:16:41,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1368.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:16:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 06:16:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2246. [2021-06-05 06:16:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 4.564810690423163) internal successors, (10248), 2245 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 10248 transitions. [2021-06-05 06:16:41,833 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 10248 transitions. Word has length 29 [2021-06-05 06:16:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:41,833 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 10248 transitions. [2021-06-05 06:16:41,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 10248 transitions. [2021-06-05 06:16:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:41,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:41,836 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:42,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:42,039 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash 698961310, now seen corresponding path program 182 times [2021-06-05 06:16:42,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:42,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320636430] [2021-06-05 06:16:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:42,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:42,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320636430] [2021-06-05 06:16:42,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320636430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:42,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913598618] [2021-06-05 06:16:42,303 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 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 06:16:42,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:43,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913598618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:43,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:43,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:43,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647382229] [2021-06-05 06:16:43,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:43,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:43,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:43,232 INFO L87 Difference]: Start difference. First operand 2246 states and 10248 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:43,931 INFO L93 Difference]: Finished difference Result 2282 states and 10326 transitions. [2021-06-05 06:16:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:16:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:43,935 INFO L225 Difference]: With dead ends: 2282 [2021-06-05 06:16:43,935 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 06:16:43,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1415.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:16:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 06:16:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2241. [2021-06-05 06:16:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 4.568303571428571) internal successors, (10233), 2240 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 10233 transitions. [2021-06-05 06:16:43,963 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 10233 transitions. Word has length 29 [2021-06-05 06:16:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:43,963 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 10233 transitions. [2021-06-05 06:16:43,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 10233 transitions. [2021-06-05 06:16:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:43,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:43,966 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:44,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-06-05 06:16:44,166 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash 778277730, now seen corresponding path program 183 times [2021-06-05 06:16:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:44,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55182574] [2021-06-05 06:16:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:44,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:44,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55182574] [2021-06-05 06:16:44,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55182574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:44,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342023090] [2021-06-05 06:16:44,455 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 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 06:16:44,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:16:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:45,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342023090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:45,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:45,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172602359] [2021-06-05 06:16:45,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:45,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:45,369 INFO L87 Difference]: Start difference. First operand 2241 states and 10233 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:45,708 INFO L93 Difference]: Finished difference Result 2376 states and 10589 transitions. [2021-06-05 06:16:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:16:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:45,713 INFO L225 Difference]: With dead ends: 2376 [2021-06-05 06:16:45,713 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 06:16:45,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1125.3ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:16:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 06:16:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2234. [2021-06-05 06:16:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 4.5763546798029555) internal successors, (10219), 2233 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 10219 transitions. [2021-06-05 06:16:45,742 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 10219 transitions. Word has length 29 [2021-06-05 06:16:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:45,742 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 10219 transitions. [2021-06-05 06:16:45,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 10219 transitions. [2021-06-05 06:16:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:45,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:45,745 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:45,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable810,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:45,945 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1588303880, now seen corresponding path program 184 times [2021-06-05 06:16:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:45,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222588407] [2021-06-05 06:16:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:46,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222588407] [2021-06-05 06:16:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222588407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667355861] [2021-06-05 06:16:46,217 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 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 06:16:46,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:16:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:47,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667355861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:47,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:47,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:47,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159380151] [2021-06-05 06:16:47,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:47,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:47,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:47,050 INFO L87 Difference]: Start difference. First operand 2234 states and 10219 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:47,616 INFO L93 Difference]: Finished difference Result 2561 states and 11409 transitions. [2021-06-05 06:16:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:16:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:47,621 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 06:16:47,621 INFO L226 Difference]: Without dead ends: 2547 [2021-06-05 06:16:47,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1216.3ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:16:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-06-05 06:16:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2320. [2021-06-05 06:16:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.567917205692108) internal successors, (10593), 2319 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 10593 transitions. [2021-06-05 06:16:47,651 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 10593 transitions. Word has length 29 [2021-06-05 06:16:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:47,651 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 10593 transitions. [2021-06-05 06:16:47,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 10593 transitions. [2021-06-05 06:16:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:47,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:47,654 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:47,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 06:16:47,855 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2105894528, now seen corresponding path program 185 times [2021-06-05 06:16:47,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:47,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889955707] [2021-06-05 06:16:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:48,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:48,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889955707] [2021-06-05 06:16:48,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889955707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:48,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835840111] [2021-06-05 06:16:48,265 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 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 06:16:48,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:16:48,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:49,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835840111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:49,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:49,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:49,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331484252] [2021-06-05 06:16:49,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:49,237 INFO L87 Difference]: Start difference. First operand 2320 states and 10593 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:49,893 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:16:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:50,562 INFO L93 Difference]: Finished difference Result 2477 states and 11087 transitions. [2021-06-05 06:16:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:16:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:50,567 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 06:16:50,567 INFO L226 Difference]: Without dead ends: 2467 [2021-06-05 06:16:50,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2076.5ms TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:16:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-06-05 06:16:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2342. [2021-06-05 06:16:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.553182400683468) internal successors, (10659), 2341 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10659 transitions. [2021-06-05 06:16:50,598 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10659 transitions. Word has length 29 [2021-06-05 06:16:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:50,598 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10659 transitions. [2021-06-05 06:16:50,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10659 transitions. [2021-06-05 06:16:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:50,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:50,601 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:50,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable819,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:50,801 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1568449412, now seen corresponding path program 186 times [2021-06-05 06:16:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:50,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75051295] [2021-06-05 06:16:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:51,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75051295] [2021-06-05 06:16:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75051295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527925217] [2021-06-05 06:16:51,108 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 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 06:16:51,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:16:51,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:51,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:16:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:51,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527925217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:51,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:51,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:51,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532443130] [2021-06-05 06:16:51,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:51,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:51,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:51,809 INFO L87 Difference]: Start difference. First operand 2342 states and 10659 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:52,236 INFO L93 Difference]: Finished difference Result 2387 states and 10797 transitions. [2021-06-05 06:16:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:16:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:52,240 INFO L225 Difference]: With dead ends: 2387 [2021-06-05 06:16:52,241 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 06:16:52,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1034.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:16:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 06:16:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2340. [2021-06-05 06:16:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 4.555365540829414) internal successors, (10655), 2339 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 10655 transitions. [2021-06-05 06:16:52,270 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 10655 transitions. Word has length 29 [2021-06-05 06:16:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:52,270 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 10655 transitions. [2021-06-05 06:16:52,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 10655 transitions. [2021-06-05 06:16:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:52,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:52,273 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:52,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2021-06-05 06:16:52,474 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash -345083362, now seen corresponding path program 187 times [2021-06-05 06:16:52,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:52,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099442859] [2021-06-05 06:16:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:52,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:52,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099442859] [2021-06-05 06:16:52,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099442859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:52,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203666586] [2021-06-05 06:16:52,767 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 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 06:16:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:16:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:53,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203666586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:53,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:53,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:53,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825470948] [2021-06-05 06:16:53,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:53,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:53,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:53,598 INFO L87 Difference]: Start difference. First operand 2340 states and 10655 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:54,171 INFO L93 Difference]: Finished difference Result 2400 states and 10829 transitions. [2021-06-05 06:16:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:16:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:54,175 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 06:16:54,175 INFO L226 Difference]: Without dead ends: 2395 [2021-06-05 06:16:54,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1230.2ms TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:16:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-05 06:16:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2347. [2021-06-05 06:16:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.549872122762149) internal successors, (10674), 2346 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 10674 transitions. [2021-06-05 06:16:54,203 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 10674 transitions. Word has length 29 [2021-06-05 06:16:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:54,203 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 10674 transitions. [2021-06-05 06:16:54,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 10674 transitions. [2021-06-05 06:16:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:54,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:54,206 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:54,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:54,406 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1330094878, now seen corresponding path program 188 times [2021-06-05 06:16:54,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:54,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023225728] [2021-06-05 06:16:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:54,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023225728] [2021-06-05 06:16:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023225728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:54,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171048331] [2021-06-05 06:16:54,680 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 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 06:16:54,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:55,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171048331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:55,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:55,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036195561] [2021-06-05 06:16:55,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:55,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:55,464 INFO L87 Difference]: Start difference. First operand 2347 states and 10674 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:55,960 INFO L93 Difference]: Finished difference Result 2388 states and 10783 transitions. [2021-06-05 06:16:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:55,964 INFO L225 Difference]: With dead ends: 2388 [2021-06-05 06:16:55,964 INFO L226 Difference]: Without dead ends: 2381 [2021-06-05 06:16:55,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1137.0ms TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:16:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-06-05 06:16:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2349. [2021-06-05 06:16:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.5489778534923335) internal successors, (10681), 2348 states have internal predecessors, (10681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10681 transitions. [2021-06-05 06:16:55,993 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10681 transitions. Word has length 29 [2021-06-05 06:16:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:55,993 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10681 transitions. [2021-06-05 06:16:55,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10681 transitions. [2021-06-05 06:16:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:55,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:55,996 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:56,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:56,197 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 762815330, now seen corresponding path program 189 times [2021-06-05 06:16:56,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:56,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073431840] [2021-06-05 06:16:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:56,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:56,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073431840] [2021-06-05 06:16:56,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073431840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:56,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444510469] [2021-06-05 06:16:56,474 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 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 06:16:56,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:16:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:57,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444510469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:57,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:57,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:16:57,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938845020] [2021-06-05 06:16:57,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:16:57,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:16:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:57,472 INFO L87 Difference]: Start difference. First operand 2349 states and 10681 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:58,414 INFO L93 Difference]: Finished difference Result 2416 states and 10917 transitions. [2021-06-05 06:16:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:16:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:58,418 INFO L225 Difference]: With dead ends: 2416 [2021-06-05 06:16:58,418 INFO L226 Difference]: Without dead ends: 2406 [2021-06-05 06:16:58,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1649.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:16:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-06-05 06:16:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2356. [2021-06-05 06:16:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 4.548619957537155) internal successors, (10712), 2355 states have internal predecessors, (10712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 10712 transitions. [2021-06-05 06:16:58,460 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 10712 transitions. Word has length 29 [2021-06-05 06:16:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:58,460 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 10712 transitions. [2021-06-05 06:16:58,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 10712 transitions. [2021-06-05 06:16:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:16:58,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:58,463 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:58,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-05 06:16:58,664 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash 659784136, now seen corresponding path program 190 times [2021-06-05 06:16:58,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:58,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386366504] [2021-06-05 06:16:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:16:58,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:58,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386366504] [2021-06-05 06:16:58,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386366504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:58,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876562321] [2021-06-05 06:16:58,817 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 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 06:16:58,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:58,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:58,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:16:58,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:59,127 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 7 treesize of output 3 [2021-06-05 06:16:59,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,161 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 7 treesize of output 3 [2021-06-05 06:16:59,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,193 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 7 treesize of output 3 [2021-06-05 06:16:59,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,223 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 7 treesize of output 3 [2021-06-05 06:16:59,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:59,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:59,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:16:59,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:85 [2021-06-05 06:16:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:16:59,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876562321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:59,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:59,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-06-05 06:16:59,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955525581] [2021-06-05 06:16:59,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:16:59,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:16:59,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:59,619 INFO L87 Difference]: Start difference. First operand 2356 states and 10712 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:59,987 INFO L93 Difference]: Finished difference Result 3321 states and 14808 transitions. [2021-06-05 06:16:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:16:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:16:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:59,993 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 06:16:59,993 INFO L226 Difference]: Without dead ends: 3288 [2021-06-05 06:16:59,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 722.9ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:16:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-06-05 06:17:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2396. [2021-06-05 06:17:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 4.583298538622129) internal successors, (10977), 2395 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 10977 transitions. [2021-06-05 06:17:00,032 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 10977 transitions. Word has length 29 [2021-06-05 06:17:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:00,032 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 10977 transitions. [2021-06-05 06:17:00,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 10977 transitions. [2021-06-05 06:17:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:17:00,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:00,052 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:00,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:00,252 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1649573022, now seen corresponding path program 191 times [2021-06-05 06:17:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072285126] [2021-06-05 06:17:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072285126] [2021-06-05 06:17:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072285126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339857311] [2021-06-05 06:17:00,628 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 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 06:17:00,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:17:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:17:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:01,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339857311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:01,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:01,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:17:01,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208723169] [2021-06-05 06:17:01,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:17:01,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:17:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:17:01,636 INFO L87 Difference]: Start difference. First operand 2396 states and 10977 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:02,308 INFO L93 Difference]: Finished difference Result 2468 states and 11183 transitions. [2021-06-05 06:17:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:17:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:17:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:02,312 INFO L225 Difference]: With dead ends: 2468 [2021-06-05 06:17:02,312 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 06:17:02,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1551.9ms TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:17:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 06:17:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2414. [2021-06-05 06:17:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.571073352673021) internal successors, (11030), 2413 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 11030 transitions. [2021-06-05 06:17:02,342 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 11030 transitions. Word has length 29 [2021-06-05 06:17:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:02,342 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 11030 transitions. [2021-06-05 06:17:02,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 11030 transitions. [2021-06-05 06:17:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:17:02,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:02,345 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:02,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 06:17:02,545 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368124, now seen corresponding path program 192 times [2021-06-05 06:17:02,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:02,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565679094] [2021-06-05 06:17:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:02,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565679094] [2021-06-05 06:17:02,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565679094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909345491] [2021-06-05 06:17:02,977 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 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 06:17:03,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:17:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:17:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:03,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909345491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:03,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:03,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:17:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117170422] [2021-06-05 06:17:03,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:17:03,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:17:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:17:03,910 INFO L87 Difference]: Start difference. First operand 2414 states and 11030 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:04,762 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 06:17:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:05,100 INFO L93 Difference]: Finished difference Result 2778 states and 12392 transitions. [2021-06-05 06:17:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:17:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:17:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:05,105 INFO L225 Difference]: With dead ends: 2778 [2021-06-05 06:17:05,105 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 06:17:05,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2023.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:17:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 06:17:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2476. [2021-06-05 06:17:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 4.586262626262626) internal successors, (11351), 2475 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 11351 transitions. [2021-06-05 06:17:05,156 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 11351 transitions. Word has length 29 [2021-06-05 06:17:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:05,156 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 11351 transitions. [2021-06-05 06:17:05,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 11351 transitions. [2021-06-05 06:17:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:17:05,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:05,160 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:05,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:05,360 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1317777476, now seen corresponding path program 193 times [2021-06-05 06:17:05,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:05,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244412297] [2021-06-05 06:17:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:05,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:05,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244412297] [2021-06-05 06:17:05,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244412297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:05,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410888526] [2021-06-05 06:17:05,599 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 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 06:17:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:17:05,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:06,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410888526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:06,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:06,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:17:06,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545130540] [2021-06-05 06:17:06,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:17:06,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:06,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:17:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:17:06,582 INFO L87 Difference]: Start difference. First operand 2476 states and 11351 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:07,223 INFO L93 Difference]: Finished difference Result 2717 states and 12214 transitions. [2021-06-05 06:17:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:17:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:17:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:07,228 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 06:17:07,228 INFO L226 Difference]: Without dead ends: 2698 [2021-06-05 06:17:07,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1401.9ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:17:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-05 06:17:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2508. [2021-06-05 06:17:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 4.594335859593139) internal successors, (11518), 2507 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 11518 transitions. [2021-06-05 06:17:07,262 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 11518 transitions. Word has length 29 [2021-06-05 06:17:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:07,262 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 11518 transitions. [2021-06-05 06:17:07,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 11518 transitions. [2021-06-05 06:17:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:07,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:07,265 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:07,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-06-05 06:17:07,466 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:07,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1438777063, now seen corresponding path program 194 times [2021-06-05 06:17:07,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:07,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189586137] [2021-06-05 06:17:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:07,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:07,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189586137] [2021-06-05 06:17:07,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189586137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:07,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272213125] [2021-06-05 06:17:07,728 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 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 06:17:07,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:17:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:08,299 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 7 treesize of output 3 [2021-06-05 06:17:08,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:08,303 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 7 treesize of output 3 [2021-06-05 06:17:08,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:08,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:08,338 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 7 treesize of output 3 [2021-06-05 06:17:08,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:08,342 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 7 treesize of output 3 [2021-06-05 06:17:08,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:08,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:08,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 06:17:08,372 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-05 06:17:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272213125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:08,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:08,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-06-05 06:17:08,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92908364] [2021-06-05 06:17:08,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:17:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:17:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:17:08,481 INFO L87 Difference]: Start difference. First operand 2508 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:09,729 INFO L93 Difference]: Finished difference Result 5624 states and 23716 transitions. [2021-06-05 06:17:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:17:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:09,739 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 06:17:09,739 INFO L226 Difference]: Without dead ends: 5507 [2021-06-05 06:17:09,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1540.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:17:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-05 06:17:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 2890. [2021-06-05 06:17:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 4.747663551401869) internal successors, (13716), 2889 states have internal predecessors, (13716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 13716 transitions. [2021-06-05 06:17:09,797 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 13716 transitions. Word has length 30 [2021-06-05 06:17:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:09,797 INFO L482 AbstractCegarLoop]: Abstraction has 2890 states and 13716 transitions. [2021-06-05 06:17:09,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 13716 transitions. [2021-06-05 06:17:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:09,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:09,801 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:10,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:10,009 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1972399915, now seen corresponding path program 195 times [2021-06-05 06:17:10,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:10,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277622975] [2021-06-05 06:17:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:10,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277622975] [2021-06-05 06:17:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277622975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649347067] [2021-06-05 06:17:10,489 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 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 06:17:10,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:17:10,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:10,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:11,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649347067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:11,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:11,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:11,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973205776] [2021-06-05 06:17:11,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:11,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:11,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:11,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:11,420 INFO L87 Difference]: Start difference. First operand 2890 states and 13716 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:12,099 INFO L93 Difference]: Finished difference Result 2970 states and 13926 transitions. [2021-06-05 06:17:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:17:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:12,117 INFO L225 Difference]: With dead ends: 2970 [2021-06-05 06:17:12,117 INFO L226 Difference]: Without dead ends: 2942 [2021-06-05 06:17:12,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1568.1ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:17:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-05 06:17:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2916. [2021-06-05 06:17:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-06-05 06:17:12,153 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-06-05 06:17:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:12,153 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-06-05 06:17:12,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-06-05 06:17:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:12,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:12,157 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:12,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 06:17:12,357 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1663574255, now seen corresponding path program 196 times [2021-06-05 06:17:12,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:12,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671108528] [2021-06-05 06:17:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:12,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:12,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671108528] [2021-06-05 06:17:12,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671108528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:12,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231348773] [2021-06-05 06:17:12,759 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 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 06:17:12,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:17:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:13,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231348773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:13,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:13,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:13,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992761157] [2021-06-05 06:17:13,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:13,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:13,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:13,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:13,702 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:14,418 INFO L93 Difference]: Finished difference Result 2973 states and 13938 transitions. [2021-06-05 06:17:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:17:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:14,423 INFO L225 Difference]: With dead ends: 2973 [2021-06-05 06:17:14,423 INFO L226 Difference]: Without dead ends: 2964 [2021-06-05 06:17:14,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1593.9ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:17:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-05 06:17:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2916. [2021-06-05 06:17:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-06-05 06:17:14,460 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-06-05 06:17:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:14,460 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-06-05 06:17:14,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-06-05 06:17:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:14,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:14,463 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:14,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:14,664 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash -152141107, now seen corresponding path program 197 times [2021-06-05 06:17:14,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:14,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222079394] [2021-06-05 06:17:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:14,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:14,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222079394] [2021-06-05 06:17:14,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222079394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:14,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982190177] [2021-06-05 06:17:14,931 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 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 06:17:14,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:17:14,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:14,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:17:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:15,634 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 7 treesize of output 3 [2021-06-05 06:17:15,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:15,638 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 7 treesize of output 3 [2021-06-05 06:17:15,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:15,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:15,690 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 7 treesize of output 3 [2021-06-05 06:17:15,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:15,694 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 7 treesize of output 3 [2021-06-05 06:17:15,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:15,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:15,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:17:15,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-06-05 06:17:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:15,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982190177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:15,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:15,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:17:15,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575099259] [2021-06-05 06:17:15,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:17:15,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:15,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:17:15,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:17:15,905 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:16,757 INFO L93 Difference]: Finished difference Result 2877 states and 13430 transitions. [2021-06-05 06:17:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:17:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:16,762 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 06:17:16,762 INFO L226 Difference]: Without dead ends: 2867 [2021-06-05 06:17:16,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1466.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:17:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-06-05 06:17:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2833. [2021-06-05 06:17:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 4.709039548022599) internal successors, (13336), 2832 states have internal predecessors, (13336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 13336 transitions. [2021-06-05 06:17:16,798 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 13336 transitions. Word has length 30 [2021-06-05 06:17:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:16,798 INFO L482 AbstractCegarLoop]: Abstraction has 2833 states and 13336 transitions. [2021-06-05 06:17:16,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 13336 transitions. [2021-06-05 06:17:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:16,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:16,802 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:17,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:17,002 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 529015159, now seen corresponding path program 198 times [2021-06-05 06:17:17,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:17,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117392657] [2021-06-05 06:17:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:17,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117392657] [2021-06-05 06:17:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117392657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161106682] [2021-06-05 06:17:17,278 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 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 06:17:17,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:17:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:18,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161106682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:18,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:18,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:18,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980986256] [2021-06-05 06:17:18,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:18,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:18,143 INFO L87 Difference]: Start difference. First operand 2833 states and 13336 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:19,120 INFO L93 Difference]: Finished difference Result 2924 states and 13557 transitions. [2021-06-05 06:17:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:17:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:19,126 INFO L225 Difference]: With dead ends: 2924 [2021-06-05 06:17:19,126 INFO L226 Difference]: Without dead ends: 2909 [2021-06-05 06:17:19,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1623.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:17:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-06-05 06:17:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2842. [2021-06-05 06:17:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 4.702569517775431) internal successors, (13360), 2841 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 13360 transitions. [2021-06-05 06:17:19,164 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 13360 transitions. Word has length 30 [2021-06-05 06:17:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:19,164 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 13360 transitions. [2021-06-05 06:17:19,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 13360 transitions. [2021-06-05 06:17:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:19,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:19,167 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:19,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:19,368 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2045937511, now seen corresponding path program 199 times [2021-06-05 06:17:19,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:19,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211948752] [2021-06-05 06:17:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:19,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211948752] [2021-06-05 06:17:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211948752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140880476] [2021-06-05 06:17:19,653 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 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 06:17:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:17:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:20,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140880476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:20,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:20,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:20,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309800734] [2021-06-05 06:17:20,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:20,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:20,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:20,458 INFO L87 Difference]: Start difference. First operand 2842 states and 13360 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:20,882 INFO L93 Difference]: Finished difference Result 2998 states and 13825 transitions. [2021-06-05 06:17:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:17:20,883 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:20,888 INFO L225 Difference]: With dead ends: 2998 [2021-06-05 06:17:20,888 INFO L226 Difference]: Without dead ends: 2980 [2021-06-05 06:17:20,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:17:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-06-05 06:17:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2865. [2021-06-05 06:17:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.696927374301676) internal successors, (13452), 2864 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13452 transitions. [2021-06-05 06:17:20,926 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13452 transitions. Word has length 30 [2021-06-05 06:17:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:20,926 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13452 transitions. [2021-06-05 06:17:20,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13452 transitions. [2021-06-05 06:17:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:20,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:20,930 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:21,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:21,130 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1843232981, now seen corresponding path program 200 times [2021-06-05 06:17:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:21,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182862675] [2021-06-05 06:17:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:21,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182862675] [2021-06-05 06:17:21,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182862675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3740810] [2021-06-05 06:17:21,592 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 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 06:17:21,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:21,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:17:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:22,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3740810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:22,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:22,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025199824] [2021-06-05 06:17:22,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:22,426 INFO L87 Difference]: Start difference. First operand 2865 states and 13452 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:23,230 INFO L93 Difference]: Finished difference Result 2907 states and 13565 transitions. [2021-06-05 06:17:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:17:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:23,235 INFO L225 Difference]: With dead ends: 2907 [2021-06-05 06:17:23,235 INFO L226 Difference]: Without dead ends: 2898 [2021-06-05 06:17:23,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1513.6ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:17:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-06-05 06:17:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2860. [2021-06-05 06:17:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 4.7037425673312345) internal successors, (13448), 2859 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 13448 transitions. [2021-06-05 06:17:23,271 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 13448 transitions. Word has length 30 [2021-06-05 06:17:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:23,271 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 13448 transitions. [2021-06-05 06:17:23,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 13448 transitions. [2021-06-05 06:17:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:23,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:23,276 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:23,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-06-05 06:17:23,492 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2006531273, now seen corresponding path program 201 times [2021-06-05 06:17:23,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:23,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301857329] [2021-06-05 06:17:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:23,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:23,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301857329] [2021-06-05 06:17:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301857329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:23,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46382888] [2021-06-05 06:17:23,795 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 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 06:17:23,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:17:23,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46382888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:24,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:24,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:24,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17781145] [2021-06-05 06:17:24,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:24,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:24,587 INFO L87 Difference]: Start difference. First operand 2860 states and 13448 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:25,264 INFO L93 Difference]: Finished difference Result 3156 states and 14386 transitions. [2021-06-05 06:17:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:17:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:25,270 INFO L225 Difference]: With dead ends: 3156 [2021-06-05 06:17:25,270 INFO L226 Difference]: Without dead ends: 3137 [2021-06-05 06:17:25,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1147.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:17:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-06-05 06:17:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2892. [2021-06-05 06:17:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 4.698374264960221) internal successors, (13583), 2891 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 13583 transitions. [2021-06-05 06:17:25,311 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 13583 transitions. Word has length 30 [2021-06-05 06:17:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:25,311 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 13583 transitions. [2021-06-05 06:17:25,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 13583 transitions. [2021-06-05 06:17:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:25,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:25,315 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:25,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:25,520 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash 472720661, now seen corresponding path program 202 times [2021-06-05 06:17:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:25,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285188403] [2021-06-05 06:17:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:25,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:25,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285188403] [2021-06-05 06:17:25,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285188403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:25,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926707126] [2021-06-05 06:17:25,792 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 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 06:17:25,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:25,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:25,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:17:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:26,150 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 7 treesize of output 3 [2021-06-05 06:17:26,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:26,154 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 7 treesize of output 3 [2021-06-05 06:17:26,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:26,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:26,188 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 7 treesize of output 3 [2021-06-05 06:17:26,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:26,191 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 7 treesize of output 3 [2021-06-05 06:17:26,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:26,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:26,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:17:26,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:81 [2021-06-05 06:17:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:26,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926707126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:26,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:26,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-06-05 06:17:26,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851931269] [2021-06-05 06:17:26,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:17:26,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:17:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:17:26,337 INFO L87 Difference]: Start difference. First operand 2892 states and 13583 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:31,082 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 06:17:35,200 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 06:17:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:35,526 INFO L93 Difference]: Finished difference Result 3764 states and 16651 transitions. [2021-06-05 06:17:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:17:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:35,533 INFO L225 Difference]: With dead ends: 3764 [2021-06-05 06:17:35,533 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 06:17:35,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9378.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:17:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 06:17:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3063. [2021-06-05 06:17:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.732854343566297) internal successors, (14492), 3062 states have internal predecessors, (14492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 14492 transitions. [2021-06-05 06:17:35,598 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 14492 transitions. Word has length 30 [2021-06-05 06:17:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:35,598 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 14492 transitions. [2021-06-05 06:17:35,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 14492 transitions. [2021-06-05 06:17:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:35,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:35,602 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:35,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:35,802 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash -968323313, now seen corresponding path program 203 times [2021-06-05 06:17:35,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:35,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909230119] [2021-06-05 06:17:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:36,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:36,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909230119] [2021-06-05 06:17:36,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909230119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:36,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111664021] [2021-06-05 06:17:36,097 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 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 06:17:36,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:17:36,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:36,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:17:36,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:36,790 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 7 treesize of output 3 [2021-06-05 06:17:36,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:36,794 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 7 treesize of output 3 [2021-06-05 06:17:36,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:36,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:36,847 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 7 treesize of output 3 [2021-06-05 06:17:36,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:36,852 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 7 treesize of output 3 [2021-06-05 06:17:36,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:36,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:36,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 06:17:36,896 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:133, output treesize:105 [2021-06-05 06:17:38,972 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 06:17:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111664021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:39,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:39,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-05 06:17:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720931934] [2021-06-05 06:17:39,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:17:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:17:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:17:39,026 INFO L87 Difference]: Start difference. First operand 3063 states and 14492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:41,782 INFO L93 Difference]: Finished difference Result 3155 states and 14639 transitions. [2021-06-05 06:17:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:17:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:41,787 INFO L225 Difference]: With dead ends: 3155 [2021-06-05 06:17:41,787 INFO L226 Difference]: Without dead ends: 3139 [2021-06-05 06:17:41,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3228.2ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:17:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-05 06:17:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3053. [2021-06-05 06:17:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 4.734272608125819) internal successors, (14449), 3052 states have internal predecessors, (14449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 14449 transitions. [2021-06-05 06:17:41,826 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 14449 transitions. Word has length 30 [2021-06-05 06:17:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:41,826 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 14449 transitions. [2021-06-05 06:17:41,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 14449 transitions. [2021-06-05 06:17:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:41,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:41,829 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:42,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:42,030 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash -805587235, now seen corresponding path program 204 times [2021-06-05 06:17:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:42,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760608178] [2021-06-05 06:17:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:42,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:42,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760608178] [2021-06-05 06:17:42,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760608178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:42,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039640038] [2021-06-05 06:17:42,430 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 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 06:17:42,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 06:17:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039640038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:43,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:43,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94210175] [2021-06-05 06:17:43,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:43,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:43,146 INFO L87 Difference]: Start difference. First operand 3053 states and 14449 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:44,633 INFO L93 Difference]: Finished difference Result 3587 states and 16130 transitions. [2021-06-05 06:17:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:17:44,634 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:44,640 INFO L225 Difference]: With dead ends: 3587 [2021-06-05 06:17:44,640 INFO L226 Difference]: Without dead ends: 3548 [2021-06-05 06:17:44,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1957.9ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:17:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-06-05 06:17:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3155. [2021-06-05 06:17:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 4.734939759036145) internal successors, (14934), 3154 states have internal predecessors, (14934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 14934 transitions. [2021-06-05 06:17:44,685 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 14934 transitions. Word has length 30 [2021-06-05 06:17:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:44,686 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 14934 transitions. [2021-06-05 06:17:44,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 14934 transitions. [2021-06-05 06:17:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:44,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:44,689 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:44,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 06:17:44,890 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1211384039, now seen corresponding path program 205 times [2021-06-05 06:17:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267027248] [2021-06-05 06:17:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:45,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:45,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267027248] [2021-06-05 06:17:45,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267027248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650192970] [2021-06-05 06:17:45,315 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 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 06:17:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:17:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:46,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650192970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:46,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:46,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:46,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945653891] [2021-06-05 06:17:46,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:46,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:46,159 INFO L87 Difference]: Start difference. First operand 3155 states and 14934 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:47,085 INFO L93 Difference]: Finished difference Result 3231 states and 15150 transitions. [2021-06-05 06:17:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:17:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:47,092 INFO L225 Difference]: With dead ends: 3231 [2021-06-05 06:17:47,092 INFO L226 Difference]: Without dead ends: 3213 [2021-06-05 06:17:47,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1661.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:17:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-06-05 06:17:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3160. [2021-06-05 06:17:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 4.733459955682178) internal successors, (14953), 3159 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 14953 transitions. [2021-06-05 06:17:47,135 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 14953 transitions. Word has length 30 [2021-06-05 06:17:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:47,135 INFO L482 AbstractCegarLoop]: Abstraction has 3160 states and 14953 transitions. [2021-06-05 06:17:47,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 14953 transitions. [2021-06-05 06:17:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:47,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:47,139 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:47,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 06:17:47,340 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash 308768783, now seen corresponding path program 206 times [2021-06-05 06:17:47,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:47,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225902116] [2021-06-05 06:17:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:47,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:47,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225902116] [2021-06-05 06:17:47,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225902116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:47,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418873154] [2021-06-05 06:17:47,493 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 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 06:17:47,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:47,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:17:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:48,127 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 7 treesize of output 3 [2021-06-05 06:17:48,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:48,132 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 7 treesize of output 3 [2021-06-05 06:17:48,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:48,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:48,184 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 7 treesize of output 3 [2021-06-05 06:17:48,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:48,188 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 7 treesize of output 3 [2021-06-05 06:17:48,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:48,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:48,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 06:17:48,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-05 06:17:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:17:50,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418873154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:50,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:50,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-06-05 06:17:50,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885798888] [2021-06-05 06:17:50,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:17:50,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:17:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=483, Unknown=1, NotChecked=0, Total=552 [2021-06-05 06:17:50,360 INFO L87 Difference]: Start difference. First operand 3160 states and 14953 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:50,775 INFO L93 Difference]: Finished difference Result 3222 states and 15004 transitions. [2021-06-05 06:17:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:17:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:50,780 INFO L225 Difference]: With dead ends: 3222 [2021-06-05 06:17:50,780 INFO L226 Difference]: Without dead ends: 3214 [2021-06-05 06:17:50,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2865.5ms TimeCoverageRelationStatistics Valid=98, Invalid=771, Unknown=1, NotChecked=0, Total=870 [2021-06-05 06:17:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-05 06:17:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3123. [2021-06-05 06:17:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 4.721652786675208) internal successors, (14741), 3122 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 14741 transitions. [2021-06-05 06:17:50,821 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 14741 transitions. Word has length 30 [2021-06-05 06:17:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:50,821 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 14741 transitions. [2021-06-05 06:17:50,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:50,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 14741 transitions. [2021-06-05 06:17:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:50,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:50,825 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:51,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:51,026 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash 65708057, now seen corresponding path program 207 times [2021-06-05 06:17:51,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:51,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730505439] [2021-06-05 06:17:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:51,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:51,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730505439] [2021-06-05 06:17:51,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730505439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:51,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122585572] [2021-06-05 06:17:51,333 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 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 06:17:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 06:17:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:52,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122585572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:52,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:52,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:52,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397746655] [2021-06-05 06:17:52,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:52,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:52,206 INFO L87 Difference]: Start difference. First operand 3123 states and 14741 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:52,714 INFO L93 Difference]: Finished difference Result 3173 states and 14878 transitions. [2021-06-05 06:17:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:17:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:52,720 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 06:17:52,720 INFO L226 Difference]: Without dead ends: 3164 [2021-06-05 06:17:52,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1176.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:17:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-06-05 06:17:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3120. [2021-06-05 06:17:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 4.727476755370311) internal successors, (14745), 3119 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 14745 transitions. [2021-06-05 06:17:52,761 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 14745 transitions. Word has length 30 [2021-06-05 06:17:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:52,761 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 14745 transitions. [2021-06-05 06:17:52,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 14745 transitions. [2021-06-05 06:17:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:52,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:52,765 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:52,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 06:17:52,969 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash -340088747, now seen corresponding path program 208 times [2021-06-05 06:17:52,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:52,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422700551] [2021-06-05 06:17:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:53,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:53,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422700551] [2021-06-05 06:17:53,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422700551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:53,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856099209] [2021-06-05 06:17:53,268 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 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 06:17:53,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:53,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:53,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:17:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:53,650 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 06:17:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:54,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856099209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:54,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:54,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:17:54,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31673001] [2021-06-05 06:17:54,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:17:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:54,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:17:54,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:17:54,273 INFO L87 Difference]: Start difference. First operand 3120 states and 14745 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:55,062 INFO L93 Difference]: Finished difference Result 3224 states and 15081 transitions. [2021-06-05 06:17:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:17:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:55,068 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 06:17:55,068 INFO L226 Difference]: Without dead ends: 3215 [2021-06-05 06:17:55,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1545.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:17:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-05 06:17:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3107. [2021-06-05 06:17:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 4.74275595621378) internal successors, (14731), 3106 states have internal predecessors, (14731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 14731 transitions. [2021-06-05 06:17:55,111 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 14731 transitions. Word has length 30 [2021-06-05 06:17:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:55,111 INFO L482 AbstractCegarLoop]: Abstraction has 3107 states and 14731 transitions. [2021-06-05 06:17:55,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 14731 transitions. [2021-06-05 06:17:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:55,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:55,115 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:55,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable925,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:55,316 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1642624171, now seen corresponding path program 209 times [2021-06-05 06:17:55,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:55,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780589109] [2021-06-05 06:17:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:17:55,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:55,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780589109] [2021-06-05 06:17:55,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780589109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:55,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688459279] [2021-06-05 06:17:55,578 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 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 06:17:55,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:17:55,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:17:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:56,023 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 06:17:56,600 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 7 treesize of output 3 [2021-06-05 06:17:56,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:56,604 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 7 treesize of output 3 [2021-06-05 06:17:56,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:56,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:56,659 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 7 treesize of output 3 [2021-06-05 06:17:56,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:56,662 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 7 treesize of output 3 [2021-06-05 06:17:56,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:56,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:56,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:17:56,715 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:157, output treesize:129 [2021-06-05 06:18:01,000 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 06:18:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:01,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688459279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:01,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:01,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-06-05 06:18:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270502776] [2021-06-05 06:18:01,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:18:01,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:18:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:18:01,076 INFO L87 Difference]: Start difference. First operand 3107 states and 14731 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:03,589 INFO L93 Difference]: Finished difference Result 3919 states and 17589 transitions. [2021-06-05 06:18:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:18:03,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:03,596 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 06:18:03,596 INFO L226 Difference]: Without dead ends: 3898 [2021-06-05 06:18:03,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 5501.1ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:18:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-06-05 06:18:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2894. [2021-06-05 06:18:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 4.713100587625302) internal successors, (13635), 2893 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 13635 transitions. [2021-06-05 06:18:03,655 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 13635 transitions. Word has length 30 [2021-06-05 06:18:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:03,655 INFO L482 AbstractCegarLoop]: Abstraction has 2894 states and 13635 transitions. [2021-06-05 06:18:03,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 13635 transitions. [2021-06-05 06:18:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:03,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:03,658 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:03,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-06-05 06:18:03,858 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:03,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2118720273, now seen corresponding path program 210 times [2021-06-05 06:18:03,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:03,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17829836] [2021-06-05 06:18:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:04,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:04,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17829836] [2021-06-05 06:18:04,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17829836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:04,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025636287] [2021-06-05 06:18:04,129 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 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 06:18:04,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:18:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:18:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:05,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025636287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:05,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:05,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:18:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596112180] [2021-06-05 06:18:05,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:18:05,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:18:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:18:05,080 INFO L87 Difference]: Start difference. First operand 2894 states and 13635 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:05,420 INFO L93 Difference]: Finished difference Result 2935 states and 13749 transitions. [2021-06-05 06:18:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:18:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:05,425 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 06:18:05,425 INFO L226 Difference]: Without dead ends: 2927 [2021-06-05 06:18:05,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1170.3ms TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:18:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-05 06:18:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2884. [2021-06-05 06:18:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 4.722858133888311) internal successors, (13616), 2883 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 13616 transitions. [2021-06-05 06:18:05,488 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 13616 transitions. Word has length 30 [2021-06-05 06:18:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:05,488 INFO L482 AbstractCegarLoop]: Abstraction has 2884 states and 13616 transitions. [2021-06-05 06:18:05,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 13616 transitions. [2021-06-05 06:18:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:05,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:05,492 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:05,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 06:18:05,692 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1459727147, now seen corresponding path program 211 times [2021-06-05 06:18:05,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:05,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623188799] [2021-06-05 06:18:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:06,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:06,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623188799] [2021-06-05 06:18:06,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623188799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:06,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201939376] [2021-06-05 06:18:06,172 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 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 06:18:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:18:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:06,714 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 06:18:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:07,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201939376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:07,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:07,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:18:07,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976296474] [2021-06-05 06:18:07,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:18:07,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:18:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:18:07,133 INFO L87 Difference]: Start difference. First operand 2884 states and 13616 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:08,103 INFO L93 Difference]: Finished difference Result 2956 states and 13808 transitions. [2021-06-05 06:18:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:18:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:08,108 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 06:18:08,108 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 06:18:08,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1780.7ms TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:18:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 06:18:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2868. [2021-06-05 06:18:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 4.732472968259505) internal successors, (13568), 2867 states have internal predecessors, (13568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 13568 transitions. [2021-06-05 06:18:08,146 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 13568 transitions. Word has length 30 [2021-06-05 06:18:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:08,146 INFO L482 AbstractCegarLoop]: Abstraction has 2868 states and 13568 transitions. [2021-06-05 06:18:08,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 13568 transitions. [2021-06-05 06:18:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:08,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:08,150 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:08,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:08,350 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:08,351 INFO L82 PathProgramCache]: Analyzing trace with hash -355988215, now seen corresponding path program 212 times [2021-06-05 06:18:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:08,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208452323] [2021-06-05 06:18:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:08,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:08,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208452323] [2021-06-05 06:18:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208452323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:08,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609612426] [2021-06-05 06:18:08,591 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 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 06:18:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:18:08,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:09,146 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 06:18:09,290 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 7 treesize of output 3 [2021-06-05 06:18:09,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:09,294 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 7 treesize of output 3 [2021-06-05 06:18:09,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:09,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:09,342 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 7 treesize of output 3 [2021-06-05 06:18:09,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:09,346 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 7 treesize of output 3 [2021-06-05 06:18:09,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:09,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:09,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:09,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-05 06:18:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:09,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609612426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:09,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:09,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-05 06:18:09,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348666653] [2021-06-05 06:18:09,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:18:09,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:18:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:18:09,587 INFO L87 Difference]: Start difference. First operand 2868 states and 13568 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,514 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 06:18:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:10,855 INFO L93 Difference]: Finished difference Result 3055 states and 13736 transitions. [2021-06-05 06:18:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:18:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:10,860 INFO L225 Difference]: With dead ends: 3055 [2021-06-05 06:18:10,860 INFO L226 Difference]: Without dead ends: 3013 [2021-06-05 06:18:10,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1687.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:18:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-05 06:18:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2785. [2021-06-05 06:18:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 4.704741379310345) internal successors, (13098), 2784 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 13098 transitions. [2021-06-05 06:18:10,895 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 13098 transitions. Word has length 30 [2021-06-05 06:18:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:10,895 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 13098 transitions. [2021-06-05 06:18:10,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 13098 transitions. [2021-06-05 06:18:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:10,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:10,899 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:11,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable951 [2021-06-05 06:18:11,100 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash 325168051, now seen corresponding path program 213 times [2021-06-05 06:18:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:11,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881374020] [2021-06-05 06:18:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:11,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:11,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881374020] [2021-06-05 06:18:11,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881374020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:11,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584652094] [2021-06-05 06:18:11,457 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 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 06:18:11,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:18:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:11,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584652094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:12,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:12,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:18:12,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130789693] [2021-06-05 06:18:12,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:18:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:18:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:18:12,269 INFO L87 Difference]: Start difference. First operand 2785 states and 13098 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:12,889 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 06:18:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:13,960 INFO L93 Difference]: Finished difference Result 3385 states and 15139 transitions. [2021-06-05 06:18:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:18:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:13,966 INFO L225 Difference]: With dead ends: 3385 [2021-06-05 06:18:13,966 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 06:18:13,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2155.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:18:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 06:18:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2865. [2021-06-05 06:18:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.692039106145251) internal successors, (13438), 2864 states have internal predecessors, (13438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13438 transitions. [2021-06-05 06:18:14,007 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13438 transitions. Word has length 30 [2021-06-05 06:18:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:14,007 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13438 transitions. [2021-06-05 06:18:14,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13438 transitions. [2021-06-05 06:18:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:14,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:14,011 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:14,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-05 06:18:14,212 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1822744915, now seen corresponding path program 214 times [2021-06-05 06:18:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:14,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485469151] [2021-06-05 06:18:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:14,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:14,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485469151] [2021-06-05 06:18:14,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485469151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:14,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345529347] [2021-06-05 06:18:14,497 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 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 06:18:14,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:18:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:18:14,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:14,974 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 7 treesize of output 3 [2021-06-05 06:18:14,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:14,978 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 7 treesize of output 3 [2021-06-05 06:18:14,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:15,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:15,017 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 7 treesize of output 3 [2021-06-05 06:18:15,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:15,021 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 7 treesize of output 3 [2021-06-05 06:18:15,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:15,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:15,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:15,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:91 [2021-06-05 06:18:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345529347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:15,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:15,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-05 06:18:15,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596085880] [2021-06-05 06:18:15,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:18:15,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:18:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:18:15,167 INFO L87 Difference]: Start difference. First operand 2865 states and 13438 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:15,925 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 06:18:20,175 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 06:18:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:20,416 INFO L93 Difference]: Finished difference Result 3569 states and 15801 transitions. [2021-06-05 06:18:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:18:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:20,423 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 06:18:20,423 INFO L226 Difference]: Without dead ends: 3527 [2021-06-05 06:18:20,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 5434.3ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:18:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-06-05 06:18:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2982. [2021-06-05 06:18:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.682321368668232) internal successors, (13958), 2981 states have internal predecessors, (13958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 13958 transitions. [2021-06-05 06:18:20,469 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 13958 transitions. Word has length 30 [2021-06-05 06:18:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:20,469 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 13958 transitions. [2021-06-05 06:18:20,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 13958 transitions. [2021-06-05 06:18:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:20,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:20,473 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:20,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:20,674 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash 844238639, now seen corresponding path program 215 times [2021-06-05 06:18:20,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:20,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629279432] [2021-06-05 06:18:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:20,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:20,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629279432] [2021-06-05 06:18:20,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629279432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:20,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696032276] [2021-06-05 06:18:20,973 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 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 06:18:21,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:18:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:18:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:21,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696032276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:21,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:21,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:18:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750790752] [2021-06-05 06:18:21,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:18:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:18:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:18:21,641 INFO L87 Difference]: Start difference. First operand 2982 states and 13958 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:22,076 INFO L93 Difference]: Finished difference Result 3047 states and 14149 transitions. [2021-06-05 06:18:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:18:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:22,081 INFO L225 Difference]: With dead ends: 3047 [2021-06-05 06:18:22,081 INFO L226 Difference]: Without dead ends: 3042 [2021-06-05 06:18:22,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 996.6ms TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:18:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-06-05 06:18:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2976. [2021-06-05 06:18:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 4.68436974789916) internal successors, (13936), 2975 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 13936 transitions. [2021-06-05 06:18:22,120 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 13936 transitions. Word has length 30 [2021-06-05 06:18:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:22,120 INFO L482 AbstractCegarLoop]: Abstraction has 2976 states and 13936 transitions. [2021-06-05 06:18:22,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 13936 transitions. [2021-06-05 06:18:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:22,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:22,123 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:22,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 06:18:22,324 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1600927089, now seen corresponding path program 216 times [2021-06-05 06:18:22,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:22,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673623348] [2021-06-05 06:18:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:22,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673623348] [2021-06-05 06:18:22,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673623348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:22,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068850075] [2021-06-05 06:18:22,582 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 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 06:18:22,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:18:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:18:22,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:23,185 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 7 treesize of output 3 [2021-06-05 06:18:23,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:23,189 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 7 treesize of output 3 [2021-06-05 06:18:23,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:23,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:23,238 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 7 treesize of output 3 [2021-06-05 06:18:23,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:23,242 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 7 treesize of output 3 [2021-06-05 06:18:23,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:23,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:23,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:23,289 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-06-05 06:18:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068850075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:23,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 06:18:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856822721] [2021-06-05 06:18:23,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:18:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:18:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:18:23,416 INFO L87 Difference]: Start difference. First operand 2976 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:24,323 INFO L93 Difference]: Finished difference Result 3127 states and 14283 transitions. [2021-06-05 06:18:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:18:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:24,329 INFO L225 Difference]: With dead ends: 3127 [2021-06-05 06:18:24,329 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 06:18:24,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1354.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:18:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 06:18:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2977. [2021-06-05 06:18:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 4.6875) internal successors, (13950), 2976 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 13950 transitions. [2021-06-05 06:18:24,368 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 13950 transitions. Word has length 30 [2021-06-05 06:18:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:24,368 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 13950 transitions. [2021-06-05 06:18:24,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 13950 transitions. [2021-06-05 06:18:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:24,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:24,372 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:24,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:24,572 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:24,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1654264789, now seen corresponding path program 217 times [2021-06-05 06:18:24,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:24,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494808668] [2021-06-05 06:18:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:24,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:24,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494808668] [2021-06-05 06:18:24,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494808668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:24,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717882043] [2021-06-05 06:18:24,927 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 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 06:18:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:24,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:18:24,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717882043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:18:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040973832] [2021-06-05 06:18:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:18:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:18:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:18:25,725 INFO L87 Difference]: Start difference. First operand 2977 states and 13950 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:27,303 INFO L93 Difference]: Finished difference Result 3332 states and 15161 transitions. [2021-06-05 06:18:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:18:27,303 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:27,309 INFO L225 Difference]: With dead ends: 3332 [2021-06-05 06:18:27,309 INFO L226 Difference]: Without dead ends: 3309 [2021-06-05 06:18:27,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2024.9ms TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:18:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-06-05 06:18:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3028. [2021-06-05 06:18:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 4.686157912124215) internal successors, (14185), 3027 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 14185 transitions. [2021-06-05 06:18:27,354 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 14185 transitions. Word has length 30 [2021-06-05 06:18:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:27,354 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 14185 transitions. [2021-06-05 06:18:27,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 14185 transitions. [2021-06-05 06:18:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:27,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:27,358 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:27,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 06:18:27,560 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash -161450573, now seen corresponding path program 218 times [2021-06-05 06:18:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537116846] [2021-06-05 06:18:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:27,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:27,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537116846] [2021-06-05 06:18:27,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537116846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:27,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113498706] [2021-06-05 06:18:27,764 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 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 06:18:27,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:18:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:28,472 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 06:18:28,639 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 7 treesize of output 3 [2021-06-05 06:18:28,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:28,643 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 7 treesize of output 3 [2021-06-05 06:18:28,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:28,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:28,692 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 7 treesize of output 3 [2021-06-05 06:18:28,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:28,696 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 7 treesize of output 3 [2021-06-05 06:18:28,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:28,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:28,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:28,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-05 06:18:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:28,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113498706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:28,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:28,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 06:18:28,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089247029] [2021-06-05 06:18:28,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:18:28,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:18:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:18:28,937 INFO L87 Difference]: Start difference. First operand 3028 states and 14185 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:29,671 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 06:18:31,910 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 06:18:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:32,373 INFO L93 Difference]: Finished difference Result 3185 states and 14482 transitions. [2021-06-05 06:18:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:18:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:32,378 INFO L225 Difference]: With dead ends: 3185 [2021-06-05 06:18:32,378 INFO L226 Difference]: Without dead ends: 3175 [2021-06-05 06:18:32,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1905.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:18:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-06-05 06:18:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3020. [2021-06-05 06:18:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 4.68532626697582) internal successors, (14145), 3019 states have internal predecessors, (14145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 14145 transitions. [2021-06-05 06:18:32,417 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 14145 transitions. Word has length 30 [2021-06-05 06:18:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:32,417 INFO L482 AbstractCegarLoop]: Abstraction has 3020 states and 14145 transitions. [2021-06-05 06:18:32,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 14145 transitions. [2021-06-05 06:18:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:32,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:32,420 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:32,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 06:18:32,625 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:32,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2045182677, now seen corresponding path program 219 times [2021-06-05 06:18:32,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:32,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406212196] [2021-06-05 06:18:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:33,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:33,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406212196] [2021-06-05 06:18:33,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406212196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:33,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830511067] [2021-06-05 06:18:33,023 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 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 06:18:33,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:18:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:18:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830511067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:33,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:33,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:18:33,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382726306] [2021-06-05 06:18:33,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:18:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:18:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:18:33,828 INFO L87 Difference]: Start difference. First operand 3020 states and 14145 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:34,696 INFO L93 Difference]: Finished difference Result 3462 states and 15765 transitions. [2021-06-05 06:18:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:18:34,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:34,702 INFO L225 Difference]: With dead ends: 3462 [2021-06-05 06:18:34,702 INFO L226 Difference]: Without dead ends: 3426 [2021-06-05 06:18:34,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1392.3ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:18:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-05 06:18:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3090. [2021-06-05 06:18:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 4.68824862415021) internal successors, (14482), 3089 states have internal predecessors, (14482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 14482 transitions. [2021-06-05 06:18:34,745 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 14482 transitions. Word has length 30 [2021-06-05 06:18:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:34,745 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 14482 transitions. [2021-06-05 06:18:34,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 14482 transitions. [2021-06-05 06:18:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:18:34,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:34,748 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:34,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 06:18:34,957 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1574669730, now seen corresponding path program 220 times [2021-06-05 06:18:34,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:34,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420966770] [2021-06-05 06:18:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:35,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420966770] [2021-06-05 06:18:35,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420966770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411459844] [2021-06-05 06:18:35,562 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 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 06:18:35,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:18:35,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:18:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:36,159 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 7 treesize of output 3 [2021-06-05 06:18:36,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:36,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:36,199 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 7 treesize of output 3 [2021-06-05 06:18:36,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:36,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:36,235 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 7 treesize of output 3 [2021-06-05 06:18:36,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:36,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:36,269 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 7 treesize of output 3 [2021-06-05 06:18:36,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:36,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:36,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:36,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-06-05 06:18:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:18:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411459844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:36,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:36,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-06-05 06:18:36,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689275435] [2021-06-05 06:18:36,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:18:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:18:36,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:18:36,448 INFO L87 Difference]: Start difference. First operand 3090 states and 14482 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:41,840 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 06:18:45,983 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 06:18:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:46,293 INFO L93 Difference]: Finished difference Result 4299 states and 19280 transitions. [2021-06-05 06:18:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:18:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:18:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:46,302 INFO L225 Difference]: With dead ends: 4299 [2021-06-05 06:18:46,302 INFO L226 Difference]: Without dead ends: 4284 [2021-06-05 06:18:46,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 10252.8ms TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:18:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-06-05 06:18:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3385. [2021-06-05 06:18:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 4.755910165484633) internal successors, (16094), 3384 states have internal predecessors, (16094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 16094 transitions. [2021-06-05 06:18:46,355 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 16094 transitions. Word has length 31 [2021-06-05 06:18:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:46,355 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 16094 transitions. [2021-06-05 06:18:46,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 16094 transitions. [2021-06-05 06:18:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:18:46,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:46,359 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:46,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable984,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:46,560 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash -501858524, now seen corresponding path program 221 times [2021-06-05 06:18:46,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:46,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858389382] [2021-06-05 06:18:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:46,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:46,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858389382] [2021-06-05 06:18:46,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858389382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:46,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611754522] [2021-06-05 06:18:46,935 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 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 06:18:46,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:18:46,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:47,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611754522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:47,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:47,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:18:47,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238654986] [2021-06-05 06:18:47,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:18:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:18:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:18:47,803 INFO L87 Difference]: Start difference. First operand 3385 states and 16094 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:48,913 INFO L93 Difference]: Finished difference Result 3784 states and 17341 transitions. [2021-06-05 06:18:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:18:48,913 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:18:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:48,920 INFO L225 Difference]: With dead ends: 3784 [2021-06-05 06:18:48,920 INFO L226 Difference]: Without dead ends: 3754 [2021-06-05 06:18:48,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1717.9ms TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:18:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-06-05 06:18:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3427. [2021-06-05 06:18:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.752189141856392) internal successors, (16281), 3426 states have internal predecessors, (16281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 16281 transitions. [2021-06-05 06:18:48,970 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 16281 transitions. Word has length 31 [2021-06-05 06:18:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:48,970 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 16281 transitions. [2021-06-05 06:18:48,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 16281 transitions. [2021-06-05 06:18:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:18:48,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:48,974 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:49,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 06:18:49,175 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:49,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1313452132, now seen corresponding path program 222 times [2021-06-05 06:18:49,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:49,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928652719] [2021-06-05 06:18:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:49,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928652719] [2021-06-05 06:18:49,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928652719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602661693] [2021-06-05 06:18:49,500 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 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 06:18:49,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:18:49,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:18:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602661693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:50,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:50,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:18:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815697917] [2021-06-05 06:18:50,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:18:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:18:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:18:50,350 INFO L87 Difference]: Start difference. First operand 3427 states and 16281 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:51,414 INFO L93 Difference]: Finished difference Result 3523 states and 16535 transitions. [2021-06-05 06:18:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:18:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:18:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:51,420 INFO L225 Difference]: With dead ends: 3523 [2021-06-05 06:18:51,420 INFO L226 Difference]: Without dead ends: 3514 [2021-06-05 06:18:51,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1693.0ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:18:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-06-05 06:18:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3416. [2021-06-05 06:18:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 4.759590043923866) internal successors, (16254), 3415 states have internal predecessors, (16254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 16254 transitions. [2021-06-05 06:18:51,466 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 16254 transitions. Word has length 31 [2021-06-05 06:18:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:51,466 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 16254 transitions. [2021-06-05 06:18:51,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 16254 transitions. [2021-06-05 06:18:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:18:51,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:51,470 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:51,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable994,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:51,671 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash -977706982, now seen corresponding path program 223 times [2021-06-05 06:18:51,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:51,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644150132] [2021-06-05 06:18:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:51,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644150132] [2021-06-05 06:18:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644150132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505287128] [2021-06-05 06:18:51,985 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 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 06:18:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:18:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:52,612 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 7 treesize of output 3 [2021-06-05 06:18:52,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:52,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:52,679 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 7 treesize of output 3 [2021-06-05 06:18:52,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:52,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:52,726 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 7 treesize of output 3 [2021-06-05 06:18:52,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:52,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:52,772 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 7 treesize of output 3 [2021-06-05 06:18:52,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:52,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:52,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:52,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:157, output treesize:129 [2021-06-05 06:18:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:53,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505287128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:53,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:53,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:18:53,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195777856] [2021-06-05 06:18:53,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:18:53,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:18:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:18:53,041 INFO L87 Difference]: Start difference. First operand 3416 states and 16254 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:54,221 INFO L93 Difference]: Finished difference Result 4312 states and 19940 transitions. [2021-06-05 06:18:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:18:54,221 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:18:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:54,229 INFO L225 Difference]: With dead ends: 4312 [2021-06-05 06:18:54,229 INFO L226 Difference]: Without dead ends: 4297 [2021-06-05 06:18:54,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1567.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:18:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-06-05 06:18:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3442. [2021-06-05 06:18:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 4.745422842197036) internal successors, (16329), 3441 states have internal predecessors, (16329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 16329 transitions. [2021-06-05 06:18:54,279 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 16329 transitions. Word has length 31 [2021-06-05 06:18:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:54,279 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 16329 transitions. [2021-06-05 06:18:54,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 16329 transitions. [2021-06-05 06:18:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:18:54,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:54,283 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:54,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 06:18:54,484 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:54,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1892834208, now seen corresponding path program 224 times [2021-06-05 06:18:54,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:54,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344622001] [2021-06-05 06:18:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:54,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:54,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344622001] [2021-06-05 06:18:54,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344622001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:54,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341806966] [2021-06-05 06:18:54,875 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 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 06:18:54,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:18:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:55,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341806966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:55,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:55,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:18:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511780672] [2021-06-05 06:18:55,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:18:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:55,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:18:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:18:55,593 INFO L87 Difference]: Start difference. First operand 3442 states and 16329 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:56,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:56,045 INFO L93 Difference]: Finished difference Result 3497 states and 16477 transitions. [2021-06-05 06:18:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:18:56,046 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:18:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:56,051 INFO L225 Difference]: With dead ends: 3497 [2021-06-05 06:18:56,051 INFO L226 Difference]: Without dead ends: 3488 [2021-06-05 06:18:56,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1109.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:18:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-06-05 06:18:56,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3445. [2021-06-05 06:18:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.745354239256678) internal successors, (16343), 3444 states have internal predecessors, (16343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 16343 transitions. [2021-06-05 06:18:56,097 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 16343 transitions. Word has length 31 [2021-06-05 06:18:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:56,097 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 16343 transitions. [2021-06-05 06:18:56,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 16343 transitions. [2021-06-05 06:18:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:18:56,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:56,101 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:56,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1014 [2021-06-05 06:18:56,302 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 262643294, now seen corresponding path program 225 times [2021-06-05 06:18:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:56,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368539743] [2021-06-05 06:18:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:56,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:56,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368539743] [2021-06-05 06:18:56,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368539743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:56,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117482572] [2021-06-05 06:18:56,642 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 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 06:18:56,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:18:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:18:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:57,246 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 7 treesize of output 3 [2021-06-05 06:18:57,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:57,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:57,290 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 7 treesize of output 3 [2021-06-05 06:18:57,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:57,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:57,328 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 7 treesize of output 3 [2021-06-05 06:18:57,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:57,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:57,363 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 7 treesize of output 3 [2021-06-05 06:18:57,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:57,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:57,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:18:57,400 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-06-05 06:18:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:18:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117482572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:57,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:57,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-06-05 06:18:57,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054105888] [2021-06-05 06:18:57,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:18:57,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:57,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:18:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:18:57,517 INFO L87 Difference]: Start difference. First operand 3445 states and 16343 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:03,065 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 06:19:07,202 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 06:19:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:07,474 INFO L93 Difference]: Finished difference Result 6226 states and 27707 transitions. [2021-06-05 06:19:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:19:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:07,485 INFO L225 Difference]: With dead ends: 6226 [2021-06-05 06:19:07,486 INFO L226 Difference]: Without dead ends: 6145 [2021-06-05 06:19:07,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 10135.7ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:19:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2021-06-05 06:19:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 3919. [2021-06-05 06:19:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-06-05 06:19:07,560 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-06-05 06:19:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:07,560 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-06-05 06:19:07,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-06-05 06:19:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:07,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:07,565 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 06:19:07,781 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1233841082, now seen corresponding path program 226 times [2021-06-05 06:19:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672263125] [2021-06-05 06:19:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:08,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672263125] [2021-06-05 06:19:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672263125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786113321] [2021-06-05 06:19:08,151 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 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 06:19:08,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:19:08,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:08,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:19:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:09,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786113321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:09,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:09,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:09,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982442303] [2021-06-05 06:19:09,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:09,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:09,074 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:09,627 INFO L93 Difference]: Finished difference Result 3997 states and 19173 transitions. [2021-06-05 06:19:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:19:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:09,634 INFO L225 Difference]: With dead ends: 3997 [2021-06-05 06:19:09,634 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 06:19:09,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1371.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:19:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 06:19:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3919. [2021-06-05 06:19:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-06-05 06:19:09,689 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-06-05 06:19:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:09,689 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-06-05 06:19:09,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-06-05 06:19:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:09,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:09,694 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:09,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 06:19:09,894 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash 110356286, now seen corresponding path program 227 times [2021-06-05 06:19:09,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:09,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443806192] [2021-06-05 06:19:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:19:10,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:10,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443806192] [2021-06-05 06:19:10,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443806192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:10,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152357450] [2021-06-05 06:19:10,161 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 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 06:19:10,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:19:10,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:19:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:10,692 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 06:19:10,988 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_208, client], 1=[node_1]} [2021-06-05 06:19:10,992 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 7 treesize of output 3 [2021-06-05 06:19:10,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:11,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:11,047 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 7 treesize of output 3 [2021-06-05 06:19:11,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:11,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:11,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:19:11,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:11,108 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:19:11,108 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 7 [2021-06-05 06:19:11,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:11,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:11,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 06:19:11,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:163, output treesize:125 [2021-06-05 06:19:13,269 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:19:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:19:13,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152357450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:13,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:13,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 06:19:13,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793620890] [2021-06-05 06:19:13,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:19:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:19:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:19:13,348 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:17,959 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 06:19:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:26,228 INFO L93 Difference]: Finished difference Result 4125 states and 19314 transitions. [2021-06-05 06:19:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:19:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:26,236 INFO L225 Difference]: With dead ends: 4125 [2021-06-05 06:19:26,236 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 06:19:26,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5420.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1403, Unknown=1, NotChecked=0, Total=1560 [2021-06-05 06:19:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 06:19:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3833. [2021-06-05 06:19:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.840814196242171) internal successors, (18550), 3832 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 18550 transitions. [2021-06-05 06:19:26,289 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 18550 transitions. Word has length 31 [2021-06-05 06:19:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:26,289 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 18550 transitions. [2021-06-05 06:19:26,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 18550 transitions. [2021-06-05 06:19:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:26,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:26,293 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:26,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 06:19:26,494 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1439139550, now seen corresponding path program 228 times [2021-06-05 06:19:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727549680] [2021-06-05 06:19:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:19:26,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:26,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727549680] [2021-06-05 06:19:26,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727549680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:26,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784840025] [2021-06-05 06:19:26,656 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 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 06:19:26,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:19:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:27,371 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 7 treesize of output 3 [2021-06-05 06:19:27,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:27,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:27,390 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 7 treesize of output 3 [2021-06-05 06:19:27,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:27,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:27,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:27,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:64, output treesize:50 [2021-06-05 06:19:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:27,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784840025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:27,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:27,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-06-05 06:19:27,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403531109] [2021-06-05 06:19:27,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:19:27,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:19:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:19:27,453 INFO L87 Difference]: Start difference. First operand 3833 states and 18550 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:27,975 INFO L93 Difference]: Finished difference Result 6856 states and 32904 transitions. [2021-06-05 06:19:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:19:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:27,989 INFO L225 Difference]: With dead ends: 6856 [2021-06-05 06:19:27,989 INFO L226 Difference]: Without dead ends: 6795 [2021-06-05 06:19:27,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:19:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-06-05 06:19:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 4695. [2021-06-05 06:19:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.002556455048999) internal successors, (23482), 4694 states have internal predecessors, (23482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23482 transitions. [2021-06-05 06:19:28,070 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23482 transitions. Word has length 31 [2021-06-05 06:19:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:28,070 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23482 transitions. [2021-06-05 06:19:28,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23482 transitions. [2021-06-05 06:19:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:28,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:28,076 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:28,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:28,276 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash 772594686, now seen corresponding path program 229 times [2021-06-05 06:19:28,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:28,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840645318] [2021-06-05 06:19:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:28,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:28,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840645318] [2021-06-05 06:19:28,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840645318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:28,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590279518] [2021-06-05 06:19:28,624 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 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 06:19:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:28,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:19:28,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:29,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590279518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:29,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:29,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:29,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349964414] [2021-06-05 06:19:29,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:29,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:29,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:29,545 INFO L87 Difference]: Start difference. First operand 4695 states and 23482 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:30,220 INFO L93 Difference]: Finished difference Result 4746 states and 23612 transitions. [2021-06-05 06:19:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:19:30,221 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:30,229 INFO L225 Difference]: With dead ends: 4746 [2021-06-05 06:19:30,229 INFO L226 Difference]: Without dead ends: 4733 [2021-06-05 06:19:30,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1349.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:19:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-05 06:19:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4681. [2021-06-05 06:19:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 5.013034188034188) internal successors, (23461), 4680 states have internal predecessors, (23461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 23461 transitions. [2021-06-05 06:19:30,311 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 23461 transitions. Word has length 31 [2021-06-05 06:19:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:30,311 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 23461 transitions. [2021-06-05 06:19:30,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 23461 transitions. [2021-06-05 06:19:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:30,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:30,317 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:30,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 06:19:30,517 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:30,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1688987100, now seen corresponding path program 230 times [2021-06-05 06:19:30,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:30,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81361063] [2021-06-05 06:19:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:30,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81361063] [2021-06-05 06:19:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81361063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763534786] [2021-06-05 06:19:30,852 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 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 06:19:30,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:19:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:19:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:31,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763534786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:31,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:31,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:31,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622340227] [2021-06-05 06:19:31,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:31,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:31,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:31,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:31,743 INFO L87 Difference]: Start difference. First operand 4681 states and 23461 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:32,462 INFO L93 Difference]: Finished difference Result 4755 states and 23651 transitions. [2021-06-05 06:19:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:19:32,462 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:32,471 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 06:19:32,471 INFO L226 Difference]: Without dead ends: 4742 [2021-06-05 06:19:32,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1492.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:19:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-06-05 06:19:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2021-06-05 06:19:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 5.007027257240204) internal successors, (23513), 4696 states have internal predecessors, (23513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 23513 transitions. [2021-06-05 06:19:32,534 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 23513 transitions. Word has length 31 [2021-06-05 06:19:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:32,534 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 23513 transitions. [2021-06-05 06:19:32,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 23513 transitions. [2021-06-05 06:19:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:32,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:32,541 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:32,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:32,741 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1029993974, now seen corresponding path program 231 times [2021-06-05 06:19:32,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:32,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248711671] [2021-06-05 06:19:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:33,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:33,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248711671] [2021-06-05 06:19:33,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248711671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:33,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127543603] [2021-06-05 06:19:33,033 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 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 06:19:33,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:19:33,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:19:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:34,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127543603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:34,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:34,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:34,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028585728] [2021-06-05 06:19:34,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:34,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:34,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:34,115 INFO L87 Difference]: Start difference. First operand 4697 states and 23513 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:34,873 INFO L93 Difference]: Finished difference Result 5035 states and 24640 transitions. [2021-06-05 06:19:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:19:34,873 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:34,882 INFO L225 Difference]: With dead ends: 5035 [2021-06-05 06:19:34,882 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 06:19:34,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1410.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:19:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 06:19:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4691. [2021-06-05 06:19:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 5.010234541577825) internal successors, (23498), 4690 states have internal predecessors, (23498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 23498 transitions. [2021-06-05 06:19:34,952 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 23498 transitions. Word has length 31 [2021-06-05 06:19:34,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:34,952 INFO L482 AbstractCegarLoop]: Abstraction has 4691 states and 23498 transitions. [2021-06-05 06:19:34,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 23498 transitions. [2021-06-05 06:19:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:34,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:34,958 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:35,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:35,158 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 632601598, now seen corresponding path program 232 times [2021-06-05 06:19:35,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:35,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574048547] [2021-06-05 06:19:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:35,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:35,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574048547] [2021-06-05 06:19:35,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574048547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:35,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774663082] [2021-06-05 06:19:35,494 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 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 06:19:35,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:19:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:19:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:36,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774663082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:36,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:36,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:36,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289627251] [2021-06-05 06:19:36,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:36,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:36,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:36,527 INFO L87 Difference]: Start difference. First operand 4691 states and 23498 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:37,034 INFO L93 Difference]: Finished difference Result 4753 states and 23660 transitions. [2021-06-05 06:19:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:19:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:37,043 INFO L225 Difference]: With dead ends: 4753 [2021-06-05 06:19:37,043 INFO L226 Difference]: Without dead ends: 4744 [2021-06-05 06:19:37,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1346.2ms TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:19:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-06-05 06:19:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4695. [2021-06-05 06:19:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.008308478909246) internal successors, (23509), 4694 states have internal predecessors, (23509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23509 transitions. [2021-06-05 06:19:37,108 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23509 transitions. Word has length 31 [2021-06-05 06:19:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:37,108 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23509 transitions. [2021-06-05 06:19:37,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23509 transitions. [2021-06-05 06:19:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:37,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:37,114 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:37,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1047,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:37,314 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1503896890, now seen corresponding path program 233 times [2021-06-05 06:19:37,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:37,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035182122] [2021-06-05 06:19:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:37,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:37,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035182122] [2021-06-05 06:19:37,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035182122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:37,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864781908] [2021-06-05 06:19:37,713 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 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 06:19:37,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 06:19:37,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:19:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:38,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864781908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:38,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:38,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:38,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657730014] [2021-06-05 06:19:38,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:38,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:38,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:38,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:38,673 INFO L87 Difference]: Start difference. First operand 4695 states and 23509 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:39,154 INFO L93 Difference]: Finished difference Result 4748 states and 23630 transitions. [2021-06-05 06:19:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:19:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:39,163 INFO L225 Difference]: With dead ends: 4748 [2021-06-05 06:19:39,163 INFO L226 Difference]: Without dead ends: 4739 [2021-06-05 06:19:39,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1316.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:19:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-06-05 06:19:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4684. [2021-06-05 06:19:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 5.014093529788597) internal successors, (23481), 4683 states have internal predecessors, (23481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 23481 transitions. [2021-06-05 06:19:39,228 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 23481 transitions. Word has length 31 [2021-06-05 06:19:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:39,228 INFO L482 AbstractCegarLoop]: Abstraction has 4684 states and 23481 transitions. [2021-06-05 06:19:39,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 23481 transitions. [2021-06-05 06:19:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:39,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:39,235 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:39,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:39,435 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1809097854, now seen corresponding path program 234 times [2021-06-05 06:19:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:39,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237424949] [2021-06-05 06:19:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:39,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:39,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237424949] [2021-06-05 06:19:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237424949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:39,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364098924] [2021-06-05 06:19:39,733 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 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 06:19:39,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 06:19:39,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:19:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:40,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364098924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:40,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:40,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:40,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54396681] [2021-06-05 06:19:40,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:40,809 INFO L87 Difference]: Start difference. First operand 4684 states and 23481 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:41,416 INFO L93 Difference]: Finished difference Result 4790 states and 23786 transitions. [2021-06-05 06:19:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:19:41,417 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:41,427 INFO L225 Difference]: With dead ends: 4790 [2021-06-05 06:19:41,427 INFO L226 Difference]: Without dead ends: 4768 [2021-06-05 06:19:41,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1383.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:19:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-06-05 06:19:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4708. [2021-06-05 06:19:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 5.007435734013172) internal successors, (23570), 4707 states have internal predecessors, (23570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 23570 transitions. [2021-06-05 06:19:41,493 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 23570 transitions. Word has length 31 [2021-06-05 06:19:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:41,493 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 23570 transitions. [2021-06-05 06:19:41,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 23570 transitions. [2021-06-05 06:19:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:41,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:41,527 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:41,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 06:19:41,727 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:41,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1256388998, now seen corresponding path program 235 times [2021-06-05 06:19:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:41,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100470876] [2021-06-05 06:19:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:42,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100470876] [2021-06-05 06:19:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100470876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466190298] [2021-06-05 06:19:42,049 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 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 06:19:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:19:42,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:42,928 INFO L446 ElimStorePlain]: Different costs {0=[node_2, v_prenex_216], 1=[node_1]} [2021-06-05 06:19:42,933 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 7 treesize of output 3 [2021-06-05 06:19:42,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:42,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:42,984 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 7 treesize of output 3 [2021-06-05 06:19:42,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:43,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:43,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:19:43,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:43,041 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:19:43,041 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 7 [2021-06-05 06:19:43,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:43,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:43,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:19:43,083 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:153, output treesize:115 [2021-06-05 06:19:47,168 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 06:19:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:19:47,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466190298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:47,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:47,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-06-05 06:19:47,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840176950] [2021-06-05 06:19:47,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:19:47,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:19:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=832, Unknown=1, NotChecked=0, Total=930 [2021-06-05 06:19:47,273 INFO L87 Difference]: Start difference. First operand 4708 states and 23570 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:48,184 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-06-05 06:19:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:58,336 INFO L93 Difference]: Finished difference Result 4927 states and 24012 transitions. [2021-06-05 06:19:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:19:58,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:19:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:58,345 INFO L225 Difference]: With dead ends: 4927 [2021-06-05 06:19:58,345 INFO L226 Difference]: Without dead ends: 4913 [2021-06-05 06:19:58,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 5626.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1635, Unknown=1, NotChecked=0, Total=1806 [2021-06-05 06:19:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-06-05 06:19:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4596. [2021-06-05 06:19:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4596 states, 4595 states have (on average 4.9910772578890095) internal successors, (22934), 4595 states have internal predecessors, (22934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4596 states to 4596 states and 22934 transitions. [2021-06-05 06:19:58,411 INFO L78 Accepts]: Start accepts. Automaton has 4596 states and 22934 transitions. Word has length 31 [2021-06-05 06:19:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:58,411 INFO L482 AbstractCegarLoop]: Abstraction has 4596 states and 22934 transitions. [2021-06-05 06:19:58,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4596 states and 22934 transitions. [2021-06-05 06:19:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:19:58,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:58,417 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:58,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:58,618 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 722766146, now seen corresponding path program 236 times [2021-06-05 06:19:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:58,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261206943] [2021-06-05 06:19:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:59,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261206943] [2021-06-05 06:19:59,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261206943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173550049] [2021-06-05 06:19:59,013 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 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 06:19:59,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:19:59,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:59,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:19:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:59,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173550049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:59,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:59,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:19:59,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650602222] [2021-06-05 06:19:59,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:19:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:19:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:19:59,902 INFO L87 Difference]: Start difference. First operand 4596 states and 22934 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:00,642 INFO L93 Difference]: Finished difference Result 4659 states and 23116 transitions. [2021-06-05 06:20:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:20:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:00,651 INFO L225 Difference]: With dead ends: 4659 [2021-06-05 06:20:00,651 INFO L226 Difference]: Without dead ends: 4654 [2021-06-05 06:20:00,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1520.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:20:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-05 06:20:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4611. [2021-06-05 06:20:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 4.983731019522777) internal successors, (22975), 4610 states have internal predecessors, (22975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 22975 transitions. [2021-06-05 06:20:00,715 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 22975 transitions. Word has length 31 [2021-06-05 06:20:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:00,715 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 22975 transitions. [2021-06-05 06:20:00,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 22975 transitions. [2021-06-05 06:20:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:00,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:00,721 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:00,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1073 [2021-06-05 06:20:00,921 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1768815720, now seen corresponding path program 237 times [2021-06-05 06:20:00,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:00,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395682972] [2021-06-05 06:20:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:01,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:01,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395682972] [2021-06-05 06:20:01,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395682972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:01,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160053288] [2021-06-05 06:20:01,270 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 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 06:20:01,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:20:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:01,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:20:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160053288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:02,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:02,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:20:02,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379616328] [2021-06-05 06:20:02,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:20:02,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:20:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:20:02,275 INFO L87 Difference]: Start difference. First operand 4611 states and 22975 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:03,147 INFO L93 Difference]: Finished difference Result 4677 states and 23170 transitions. [2021-06-05 06:20:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:20:03,147 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:03,156 INFO L225 Difference]: With dead ends: 4677 [2021-06-05 06:20:03,156 INFO L226 Difference]: Without dead ends: 4672 [2021-06-05 06:20:03,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1599.3ms TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:20:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2021-06-05 06:20:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4608. [2021-06-05 06:20:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 4.9843716084219665) internal successors, (22963), 4607 states have internal predecessors, (22963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 22963 transitions. [2021-06-05 06:20:03,240 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 22963 transitions. Word has length 31 [2021-06-05 06:20:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:03,240 INFO L482 AbstractCegarLoop]: Abstraction has 4608 states and 22963 transitions. [2021-06-05 06:20:03,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 22963 transitions. [2021-06-05 06:20:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:03,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:03,246 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:03,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:03,447 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash 645330924, now seen corresponding path program 238 times [2021-06-05 06:20:03,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:03,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240587103] [2021-06-05 06:20:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:03,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240587103] [2021-06-05 06:20:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240587103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824630401] [2021-06-05 06:20:03,635 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 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 06:20:03,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:03,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:03,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:20:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:04,078 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_219, client], 1=[node_1]} [2021-06-05 06:20:04,082 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 7 treesize of output 3 [2021-06-05 06:20:04,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:04,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:04,120 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 7 treesize of output 3 [2021-06-05 06:20:04,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:04,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:04,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:20:04,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:04,162 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:04,163 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 7 [2021-06-05 06:20:04,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:04,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:04,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:20:04,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:119, output treesize:81 [2021-06-05 06:20:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824630401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:04,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:04,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-05 06:20:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541355576] [2021-06-05 06:20:04,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:20:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:04,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:20:04,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:20:04,311 INFO L87 Difference]: Start difference. First operand 4608 states and 22963 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:05,465 INFO L93 Difference]: Finished difference Result 6511 states and 30124 transitions. [2021-06-05 06:20:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:20:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:05,479 INFO L225 Difference]: With dead ends: 6511 [2021-06-05 06:20:05,479 INFO L226 Difference]: Without dead ends: 6459 [2021-06-05 06:20:05,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1237.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:20:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-06-05 06:20:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5001. [2021-06-05 06:20:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 5000 states have (on average 4.9974) internal successors, (24987), 5000 states have internal predecessors, (24987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 24987 transitions. [2021-06-05 06:20:05,566 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 24987 transitions. Word has length 31 [2021-06-05 06:20:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:05,566 INFO L482 AbstractCegarLoop]: Abstraction has 5001 states and 24987 transitions. [2021-06-05 06:20:05,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 24987 transitions. [2021-06-05 06:20:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:05,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:05,573 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:05,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-06-05 06:20:05,774 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash -131458844, now seen corresponding path program 239 times [2021-06-05 06:20:05,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:05,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950084351] [2021-06-05 06:20:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:06,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950084351] [2021-06-05 06:20:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950084351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829828462] [2021-06-05 06:20:06,153 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 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 06:20:06,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:20:06,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:20:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:06,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829828462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:06,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:06,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:20:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999169488] [2021-06-05 06:20:06,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:20:06,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:06,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:20:06,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:20:06,930 INFO L87 Difference]: Start difference. First operand 5001 states and 24987 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:07,624 INFO L93 Difference]: Finished difference Result 5062 states and 25165 transitions. [2021-06-05 06:20:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:20:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:07,634 INFO L225 Difference]: With dead ends: 5062 [2021-06-05 06:20:07,634 INFO L226 Difference]: Without dead ends: 5057 [2021-06-05 06:20:07,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:20:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5057 states. [2021-06-05 06:20:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5057 to 5004. [2021-06-05 06:20:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 5003 states have (on average 4.995802518488906) internal successors, (24994), 5003 states have internal predecessors, (24994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 24994 transitions. [2021-06-05 06:20:07,705 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 24994 transitions. Word has length 31 [2021-06-05 06:20:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:07,705 INFO L482 AbstractCegarLoop]: Abstraction has 5004 states and 24994 transitions. [2021-06-05 06:20:07,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 24994 transitions. [2021-06-05 06:20:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:07,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:07,712 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:07,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:07,912 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:07,912 INFO L82 PathProgramCache]: Analyzing trace with hash -790451970, now seen corresponding path program 240 times [2021-06-05 06:20:07,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:07,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881499448] [2021-06-05 06:20:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:08,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:08,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881499448] [2021-06-05 06:20:08,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881499448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:08,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469621394] [2021-06-05 06:20:08,235 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 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 06:20:08,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:20:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:20:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:09,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469621394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:09,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:09,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:20:09,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594271622] [2021-06-05 06:20:09,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:20:09,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:20:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:20:09,149 INFO L87 Difference]: Start difference. First operand 5004 states and 24994 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:09,623 INFO L93 Difference]: Finished difference Result 5057 states and 25155 transitions. [2021-06-05 06:20:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:20:09,624 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:09,633 INFO L225 Difference]: With dead ends: 5057 [2021-06-05 06:20:09,633 INFO L226 Difference]: Without dead ends: 5052 [2021-06-05 06:20:09,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1187.6ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:20:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-06-05 06:20:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 5006. [2021-06-05 06:20:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 5005 states have (on average 4.995004995004995) internal successors, (25000), 5005 states have internal predecessors, (25000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 25000 transitions. [2021-06-05 06:20:09,706 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 25000 transitions. Word has length 31 [2021-06-05 06:20:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:09,706 INFO L482 AbstractCegarLoop]: Abstraction has 5006 states and 25000 transitions. [2021-06-05 06:20:09,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 25000 transitions. [2021-06-05 06:20:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:09,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:09,713 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:09,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:09,913 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:09,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:09,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1913936766, now seen corresponding path program 241 times [2021-06-05 06:20:09,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:09,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983310243] [2021-06-05 06:20:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:10,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983310243] [2021-06-05 06:20:10,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983310243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820161976] [2021-06-05 06:20:10,195 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 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 06:20:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:20:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:10,936 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 06:20:11,286 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_228, client], 1=[node_1]} [2021-06-05 06:20:11,291 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 7 treesize of output 3 [2021-06-05 06:20:11,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:11,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:11,347 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 7 treesize of output 3 [2021-06-05 06:20:11,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:11,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:11,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:20:11,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:11,409 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:11,409 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 7 [2021-06-05 06:20:11,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:11,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:11,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 06:20:11,457 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:163, output treesize:125 [2021-06-05 06:20:15,561 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:20:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:15,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820161976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:15,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:15,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-06-05 06:20:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175237914] [2021-06-05 06:20:15,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:20:15,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:20:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=821, Unknown=1, NotChecked=0, Total=930 [2021-06-05 06:20:15,637 INFO L87 Difference]: Start difference. First operand 5006 states and 25000 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:16,662 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 06:20:16,852 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 06:20:21,093 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 06:20:24,467 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-06-05 06:20:30,608 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 06:20:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:30,760 INFO L93 Difference]: Finished difference Result 5247 states and 25636 transitions. [2021-06-05 06:20:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:20:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:30,770 INFO L225 Difference]: With dead ends: 5247 [2021-06-05 06:20:30,770 INFO L226 Difference]: Without dead ends: 5223 [2021-06-05 06:20:30,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 14913.5ms TimeCoverageRelationStatistics Valid=309, Invalid=2658, Unknown=3, NotChecked=0, Total=2970 [2021-06-05 06:20:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-06-05 06:20:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 5010. [2021-06-05 06:20:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5009 states have (on average 4.993411858654422) internal successors, (25012), 5009 states have internal predecessors, (25012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 25012 transitions. [2021-06-05 06:20:30,843 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 25012 transitions. Word has length 31 [2021-06-05 06:20:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:30,843 INFO L482 AbstractCegarLoop]: Abstraction has 5010 states and 25012 transitions. [2021-06-05 06:20:30,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 25012 transitions. [2021-06-05 06:20:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:30,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:30,850 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:31,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1091 [2021-06-05 06:20:31,050 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1614583170, now seen corresponding path program 242 times [2021-06-05 06:20:31,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:31,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395509108] [2021-06-05 06:20:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:31,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:31,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395509108] [2021-06-05 06:20:31,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395509108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:31,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646501450] [2021-06-05 06:20:31,319 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 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 06:20:31,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:31,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:20:31,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:32,167 INFO L446 ElimStorePlain]: Different costs {0=[client, v_prenex_236], 3=[node_1]} [2021-06-05 06:20:32,172 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 7 treesize of output 3 [2021-06-05 06:20:32,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:32,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:32,222 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 7 treesize of output 3 [2021-06-05 06:20:32,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:32,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:32,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:20:32,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:32,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:20:32,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:32,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:32,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:20:32,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:149, output treesize:95 [2021-06-05 06:20:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646501450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:32,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:32,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-06-05 06:20:32,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579807736] [2021-06-05 06:20:32,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:20:32,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:20:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:20:32,459 INFO L87 Difference]: Start difference. First operand 5010 states and 25012 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:34,640 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-06-05 06:20:35,043 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 06:20:35,216 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-05 06:20:35,709 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 06:20:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:35,910 INFO L93 Difference]: Finished difference Result 5157 states and 25330 transitions. [2021-06-05 06:20:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:20:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:35,920 INFO L225 Difference]: With dead ends: 5157 [2021-06-05 06:20:35,921 INFO L226 Difference]: Without dead ends: 5145 [2021-06-05 06:20:35,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 3925.9ms TimeCoverageRelationStatistics Valid=394, Invalid=2912, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:20:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2021-06-05 06:20:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 4999. [2021-06-05 06:20:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 4998 states have (on average 4.992997198879552) internal successors, (24955), 4998 states have internal predecessors, (24955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 24955 transitions. [2021-06-05 06:20:35,995 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 24955 transitions. Word has length 31 [2021-06-05 06:20:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:35,995 INFO L482 AbstractCegarLoop]: Abstraction has 4999 states and 24955 transitions. [2021-06-05 06:20:35,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 24955 transitions. [2021-06-05 06:20:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:36,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:36,002 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:36,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 06:20:36,203 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:36,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1251698366, now seen corresponding path program 243 times [2021-06-05 06:20:36,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:36,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099285322] [2021-06-05 06:20:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:36,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:36,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099285322] [2021-06-05 06:20:36,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099285322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:36,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322229169] [2021-06-05 06:20:36,566 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 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 06:20:36,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:20:36,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:20:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:37,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322229169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:37,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:37,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:20:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634576068] [2021-06-05 06:20:37,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:20:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:20:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:20:37,390 INFO L87 Difference]: Start difference. First operand 4999 states and 24955 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:38,209 INFO L93 Difference]: Finished difference Result 5074 states and 25174 transitions. [2021-06-05 06:20:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:20:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:38,219 INFO L225 Difference]: With dead ends: 5074 [2021-06-05 06:20:38,219 INFO L226 Difference]: Without dead ends: 5069 [2021-06-05 06:20:38,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1265.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:20:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-05 06:20:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4969. [2021-06-05 06:20:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 5.0076489533011275) internal successors, (24878), 4968 states have internal predecessors, (24878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 24878 transitions. [2021-06-05 06:20:38,289 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 24878 transitions. Word has length 31 [2021-06-05 06:20:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:38,289 INFO L482 AbstractCegarLoop]: Abstraction has 4969 states and 24878 transitions. [2021-06-05 06:20:38,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 24878 transitions. [2021-06-05 06:20:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:38,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:38,295 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:38,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 06:20:38,496 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:38,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1052541890, now seen corresponding path program 244 times [2021-06-05 06:20:38,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:38,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592086667] [2021-06-05 06:20:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:38,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:38,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592086667] [2021-06-05 06:20:38,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592086667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:38,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406587437] [2021-06-05 06:20:38,734 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 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 06:20:38,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:38,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:20:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:39,477 INFO L446 ElimStorePlain]: Different costs {0=[node_2, v_prenex_240], 1=[node_1]} [2021-06-05 06:20:39,481 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 7 treesize of output 3 [2021-06-05 06:20:39,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:39,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:39,534 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 7 treesize of output 3 [2021-06-05 06:20:39,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:39,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:39,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:20:39,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:39,592 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:39,592 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 7 [2021-06-05 06:20:39,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:39,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:39,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 06:20:39,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:153, output treesize:115 [2021-06-05 06:20:43,713 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 06:20:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406587437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:43,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:43,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 06:20:43,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768019220] [2021-06-05 06:20:43,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:20:43,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:43,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:20:43,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=546, Unknown=1, NotChecked=0, Total=650 [2021-06-05 06:20:43,789 INFO L87 Difference]: Start difference. First operand 4969 states and 24878 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 06:20:53,990 WARN L222 SmtUtils]: Removed 12 from assertion stack [2021-06-05 06:20:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:20:54,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-05 06:20:54,190 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:20:54,192 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:20:54,193 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:20:54,193 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:20:54 BasicIcfg [2021-06-05 06:20:54,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:20:54,193 INFO L168 Benchmark]: Toolchain (without parser) took 856742.83 ms. Allocated memory was 362.8 MB in the beginning and 994.1 MB in the end (delta: 631.2 MB). Free memory was 342.2 MB in the beginning and 591.1 MB in the end (delta: -248.9 MB). Peak memory consumption was 383.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:20:54,194 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 362.8 MB. Free memory was 343.6 MB in the beginning and 343.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:20:54,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.04 ms. Allocated memory is still 362.8 MB. Free memory was 342.0 MB in the beginning and 340.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:20:54,194 INFO L168 Benchmark]: Boogie Preprocessor took 14.09 ms. Allocated memory is still 362.8 MB. Free memory was 340.6 MB in the beginning and 339.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:20:54,194 INFO L168 Benchmark]: RCFGBuilder took 409.79 ms. Allocated memory is still 362.8 MB. Free memory was 339.4 MB in the beginning and 327.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. [2021-06-05 06:20:54,194 INFO L168 Benchmark]: TraceAbstraction took 856295.72 ms. Allocated memory was 362.8 MB in the beginning and 994.1 MB in the end (delta: 631.2 MB). Free memory was 326.5 MB in the beginning and 591.1 MB in the end (delta: -264.6 MB). Peak memory consumption was 366.2 MB. Max. memory is 16.0 GB. [2021-06-05 06:20:54,194 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 0.09 ms. Allocated memory is still 362.8 MB. Free memory was 343.6 MB in the beginning and 343.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.04 ms. Allocated memory is still 362.8 MB. Free memory was 342.0 MB in the beginning and 340.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.09 ms. Allocated memory is still 362.8 MB. Free memory was 340.6 MB in the beginning and 339.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 409.79 ms. Allocated memory is still 362.8 MB. Free memory was 339.4 MB in the beginning and 327.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 856295.72 ms. Allocated memory was 362.8 MB in the beginning and 994.1 MB in the end (delta: 631.2 MB). Free memory was 326.5 MB in the beginning and 591.1 MB in the end (delta: -264.6 MB). Peak memory consumption was 366.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 165]: 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 (4969states) and FLOYD_HOARE automaton (currently 13 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 2017ms.. - TimeoutResultAtElement [Line: 163]: 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 (4969states) and FLOYD_HOARE automaton (currently 13 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 2017ms.. - TimeoutResultAtElement [Line: 163]: 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 (4969states) and FLOYD_HOARE automaton (currently 13 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 2017ms.. - TimeoutResultAtElement [Line: 164]: 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 (4969states) and FLOYD_HOARE automaton (currently 13 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 2017ms.. - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4969states) and FLOYD_HOARE automaton (currently 13 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 64 for 2017ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 856215.1ms, OverallIterations: 287, TraceHistogramMax: 9, EmptinessCheckTime: 677.6ms, AutomataDifference: 404194.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11338 SDtfs, 19350 SDslu, 155772 SDs, 0 SdLazy, 92277 SolverSat, 5465 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 102189.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12431 GetRequests, 4422 SyntacticMatches, 10 SemanticMatches, 7998 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45032 ImplicationChecksByTransitivity, 617992.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5010occurred in iteration=284, InterpolantAutomatonStates: 4684, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6541.7ms AutomataMinimizationTime, 286 MinimizatonAttempts, 50375 StatesRemovedByMinimization, 281 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2216.4ms SsaConstructionTime, 6752.6ms SatisfiabilityAnalysisTime, 372176.2ms InterpolantComputationTime, 14866 NumberOfCodeBlocks, 14865 NumberOfCodeBlocksAsserted, 1279 NumberOfCheckSat, 14296 ConstructedInterpolants, 853 QuantifiedInterpolants, 301695 SizeOfPredicates, 3886 NumberOfNonLiveVariables, 21550 ConjunctsInSsa, 5389 ConjunctsInUnsatCore, 570 InterpolantComputations, 4 PerfectInterpolantSequences, 2005/16752 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