/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-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:51:12,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:51:12,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:51:12,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:51:12,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:51:12,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:51:12,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:51:12,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:51:12,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:51:12,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:51:12,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:51:12,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:51:12,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:51:12,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:51:12,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:51:12,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:51:12,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:51:12,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:51:12,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:51:12,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:51:12,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:51:12,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:51:12,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:51:12,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:51:12,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:51:12,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:51:12,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:51:12,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:51:12,450 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 [2021-02-19 18:51:12,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:51:12,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:51:12,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:51:12,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:51:12,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:51:12,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:51:12,490 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:51:12,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:51:12,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:51:12,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:51:12,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:51:12,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:51:12,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:51:12,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:51:12,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:51:12,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:51:12,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:51:12,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:51:12,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:51:12,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:51:12,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:51:12,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:51:12,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:51:12,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:51:12,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:51:12,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:51:12,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:51:12,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:51:12,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:51:12,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:51:12,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:51:12,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:51:12,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:51:12,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:51:12,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:51:12,829 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:51:12,830 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:51:12,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2021-02-19 18:51:12,845 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2021-02-19 18:51:12,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:51:12,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:51:12,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:51:12,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:51:12,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:51:12,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:51:12,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:51:12,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:51:12,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:51:12,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/1) ... [2021-02-19 18:51:12,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:51:12,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:51:12,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:51:12,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:51:12,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (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 [2021-02-19 18:51:12,998 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:51:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:51:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:51:12,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:51:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:51:12,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:51:12,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:51:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:51:12,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:51:12,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:51:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:51:13,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:51:13,001 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:51:13,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:51:13,213 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:51:13,214 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:51:13 BoogieIcfgContainer [2021-02-19 18:51:13,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:51:13,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:51:13,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:51:13,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:51:13,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:12" (1/2) ... [2021-02-19 18:51:13,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e0033a and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:51:13, skipping insertion in model container [2021-02-19 18:51:13,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:51:13" (2/2) ... [2021-02-19 18:51:13,220 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2021-02-19 18:51:13,241 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:51:13,241 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:51:13,244 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:51:13,245 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:51:13,289 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:51:13,303 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:51:13,318 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:51:13,318 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:51:13,318 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:51:13,319 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:51:13,319 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:51:13,319 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:51:13,319 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:51:13,319 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:51:13,326 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-02-19 18:51:13,355 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:51:13,366 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:13,366 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:13,367 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1845580258, now seen corresponding path program 1 times [2021-02-19 18:51:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:13,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151196411] [2021-02-19 18:51:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:13,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151196411] [2021-02-19 18:51:13,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:13,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:51:13,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990495624] [2021-02-19 18:51:13,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:51:13,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:51:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:51:13,513 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:13,546 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-02-19 18:51:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:51:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:13,559 INFO L225 Difference]: With dead ends: 298 [2021-02-19 18:51:13,559 INFO L226 Difference]: Without dead ends: 283 [2021-02-19 18:51:13,561 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:51:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-02-19 18:51:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-02-19 18:51:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-02-19 18:51:13,610 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-02-19 18:51:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:13,611 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-02-19 18:51:13,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-02-19 18:51:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:13,613 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:13,613 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:13,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:51:13,614 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1395774955, now seen corresponding path program 1 times [2021-02-19 18:51:13,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:13,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514054494] [2021-02-19 18:51:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:13,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514054494] [2021-02-19 18:51:13,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789300170] [2021-02-19 18:51:13,752 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 [2021-02-19 18:51:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:13,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:13,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:51:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063586830] [2021-02-19 18:51:13,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:13,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:13,953 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-02-19 18:51:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:14,363 INFO L93 Difference]: Finished difference Result 1019 states and 2933 transitions. [2021-02-19 18:51:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:51:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 [2021-02-19 18:51:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:14,372 INFO L225 Difference]: With dead ends: 1019 [2021-02-19 18:51:14,372 INFO L226 Difference]: Without dead ends: 1019 [2021-02-19 18:51:14,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-02-19 18:51:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 253. [2021-02-19 18:51:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-02-19 18:51:14,414 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2021-02-19 18:51:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:14,414 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-02-19 18:51:14,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-02-19 18:51:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-02-19 18:51:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:14,416 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:14,416 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:14,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 18:51:14,631 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1201874287, now seen corresponding path program 2 times [2021-02-19 18:51:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:14,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534623769] [2021-02-19 18:51:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:14,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534623769] [2021-02-19 18:51:14,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081286278] [2021-02-19 18:51:14,705 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 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 [2021-02-19 18:51:14,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:14,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:14,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:14,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:51:14,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503161073] [2021-02-19 18:51:14,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:14,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:14,801 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-02-19 18:51:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:15,160 INFO L93 Difference]: Finished difference Result 1035 states and 2973 transitions. [2021-02-19 18:51:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:51:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 [2021-02-19 18:51:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:15,168 INFO L225 Difference]: With dead ends: 1035 [2021-02-19 18:51:15,169 INFO L226 Difference]: Without dead ends: 1035 [2021-02-19 18:51:15,169 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:15,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-02-19 18:51:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 252. [2021-02-19 18:51:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2021-02-19 18:51:15,186 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2021-02-19 18:51:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:15,186 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2021-02-19 18:51:15,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-02-19 18:51:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2021-02-19 18:51:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:15,188 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:15,188 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:15,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:15,398 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash 503034988, now seen corresponding path program 1 times [2021-02-19 18:51:15,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:15,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997314040] [2021-02-19 18:51:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:15,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997314040] [2021-02-19 18:51:15,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:15,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:51:15,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899117436] [2021-02-19 18:51:15,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:51:15,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:15,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:51:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:51:15,444 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:15,519 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2021-02-19 18:51:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:51:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:15,522 INFO L225 Difference]: With dead ends: 483 [2021-02-19 18:51:15,523 INFO L226 Difference]: Without dead ends: 477 [2021-02-19 18:51:15,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:51:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-02-19 18:51:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2021-02-19 18:51:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2021-02-19 18:51:15,534 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2021-02-19 18:51:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:15,534 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2021-02-19 18:51:15,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2021-02-19 18:51:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:15,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:15,536 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:15,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:51:15,536 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1058438975, now seen corresponding path program 1 times [2021-02-19 18:51:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:15,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732683794] [2021-02-19 18:51:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:15,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732683794] [2021-02-19 18:51:15,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:15,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:51:15,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558983508] [2021-02-19 18:51:15,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:51:15,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:15,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:51:15,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:51:15,575 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:15,650 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2021-02-19 18:51:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:51:15,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:15,654 INFO L225 Difference]: With dead ends: 539 [2021-02-19 18:51:15,654 INFO L226 Difference]: Without dead ends: 521 [2021-02-19 18:51:15,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-02-19 18:51:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2021-02-19 18:51:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2021-02-19 18:51:15,667 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2021-02-19 18:51:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:15,667 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2021-02-19 18:51:15,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2021-02-19 18:51:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:15,668 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:15,669 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:15,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:51:15,669 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -855567958, now seen corresponding path program 2 times [2021-02-19 18:51:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:15,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354055290] [2021-02-19 18:51:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:15,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354055290] [2021-02-19 18:51:15,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:15,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:51:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954861328] [2021-02-19 18:51:15,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:51:15,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:15,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:51:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:51:15,729 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:15,788 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2021-02-19 18:51:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:51:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:15,793 INFO L225 Difference]: With dead ends: 486 [2021-02-19 18:51:15,793 INFO L226 Difference]: Without dead ends: 486 [2021-02-19 18:51:15,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:51:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-02-19 18:51:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2021-02-19 18:51:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2021-02-19 18:51:15,810 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2021-02-19 18:51:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:15,810 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2021-02-19 18:51:15,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2021-02-19 18:51:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:15,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:15,817 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:15,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:51:15,818 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash 309236070, now seen corresponding path program 3 times [2021-02-19 18:51:15,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:15,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398527494] [2021-02-19 18:51:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:15,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398527494] [2021-02-19 18:51:15,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:15,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:51:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406912777] [2021-02-19 18:51:15,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:51:15,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:51:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:51:15,867 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:15,936 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2021-02-19 18:51:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:51:15,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:15,938 INFO L225 Difference]: With dead ends: 438 [2021-02-19 18:51:15,938 INFO L226 Difference]: Without dead ends: 438 [2021-02-19 18:51:15,939 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-02-19 18:51:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-02-19 18:51:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-02-19 18:51:15,949 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-02-19 18:51:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:15,949 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-02-19 18:51:15,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-02-19 18:51:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:15,950 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:15,950 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:15,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:51:15,951 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1202147095, now seen corresponding path program 3 times [2021-02-19 18:51:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:15,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974141453] [2021-02-19 18:51:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:16,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974141453] [2021-02-19 18:51:16,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112860963] [2021-02-19 18:51:16,011 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 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 [2021-02-19 18:51:16,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:51:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:16,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:16,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 18:51:16,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956291281] [2021-02-19 18:51:16,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:51:16,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:51:16,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:16,124 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:16,380 INFO L93 Difference]: Finished difference Result 994 states and 2769 transitions. [2021-02-19 18:51:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:16,386 INFO L225 Difference]: With dead ends: 994 [2021-02-19 18:51:16,386 INFO L226 Difference]: Without dead ends: 994 [2021-02-19 18:51:16,386 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:51:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-02-19 18:51:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 323. [2021-02-19 18:51:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-02-19 18:51:16,404 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-02-19 18:51:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:16,406 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-02-19 18:51:16,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-02-19 18:51:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:16,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:16,407 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:16,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:16,629 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:16,629 INFO L82 PathProgramCache]: Analyzing trace with hash 780532961, now seen corresponding path program 2 times [2021-02-19 18:51:16,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:16,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404709781] [2021-02-19 18:51:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:16,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404709781] [2021-02-19 18:51:16,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:16,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:51:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090706531] [2021-02-19 18:51:16,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:51:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:51:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:51:16,675 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:16,829 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2021-02-19 18:51:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:51:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:16,832 INFO L225 Difference]: With dead ends: 466 [2021-02-19 18:51:16,832 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 18:51:16,832 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 18:51:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2021-02-19 18:51:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-02-19 18:51:16,844 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2021-02-19 18:51:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:16,844 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-02-19 18:51:16,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-02-19 18:51:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:16,845 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:16,845 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:16,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:51:16,845 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:16,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1391365393, now seen corresponding path program 4 times [2021-02-19 18:51:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:16,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976639859] [2021-02-19 18:51:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976639859] [2021-02-19 18:51:16,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:16,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:51:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142895470] [2021-02-19 18:51:16,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:51:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:51:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:51:16,886 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:16,987 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2021-02-19 18:51:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:51:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:16,990 INFO L225 Difference]: With dead ends: 541 [2021-02-19 18:51:16,990 INFO L226 Difference]: Without dead ends: 537 [2021-02-19 18:51:16,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-02-19 18:51:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2021-02-19 18:51:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2021-02-19 18:51:16,999 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2021-02-19 18:51:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:17,000 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2021-02-19 18:51:17,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2021-02-19 18:51:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:17,001 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:17,001 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:17,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:51:17,001 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177, now seen corresponding path program 5 times [2021-02-19 18:51:17,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:17,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741551554] [2021-02-19 18:51:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:17,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741551554] [2021-02-19 18:51:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843845193] [2021-02-19 18:51:17,044 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:17,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:17,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:17,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:51:17,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39385401] [2021-02-19 18:51:17,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:17,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:17,141 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 10 states, 10 states have (on average 3.1) 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) [2021-02-19 18:51:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:17,358 INFO L93 Difference]: Finished difference Result 760 states and 2180 transitions. [2021-02-19 18:51:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:51:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) 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 21 [2021-02-19 18:51:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:17,361 INFO L225 Difference]: With dead ends: 760 [2021-02-19 18:51:17,362 INFO L226 Difference]: Without dead ends: 760 [2021-02-19 18:51:17,362 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-02-19 18:51:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 278. [2021-02-19 18:51:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2021-02-19 18:51:17,371 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2021-02-19 18:51:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:17,372 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2021-02-19 18:51:17,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) 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) [2021-02-19 18:51:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2021-02-19 18:51:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:17,373 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:17,373 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:17,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:17,594 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:17,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1780805293, now seen corresponding path program 6 times [2021-02-19 18:51:17,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:17,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312570257] [2021-02-19 18:51:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:17,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312570257] [2021-02-19 18:51:17,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:17,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:51:17,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467689843] [2021-02-19 18:51:17,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:51:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:17,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:51:17,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:51:17,630 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:17,701 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2021-02-19 18:51:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:51:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:17,703 INFO L225 Difference]: With dead ends: 429 [2021-02-19 18:51:17,703 INFO L226 Difference]: Without dead ends: 425 [2021-02-19 18:51:17,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-02-19 18:51:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2021-02-19 18:51:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2021-02-19 18:51:17,712 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2021-02-19 18:51:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:17,712 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2021-02-19 18:51:17,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2021-02-19 18:51:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:17,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:17,715 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:17,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 18:51:17,715 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash 651216835, now seen corresponding path program 1 times [2021-02-19 18:51:17,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:17,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124873481] [2021-02-19 18:51:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:17,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124873481] [2021-02-19 18:51:17,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676205877] [2021-02-19 18:51:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 18:51:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:17,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:51:17,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:17,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:17,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:17,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:17,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:51:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:17,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:17,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-02-19 18:51:17,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276480985] [2021-02-19 18:51:17,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:51:17,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:51:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:17,968 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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) [2021-02-19 18:51:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:18,058 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2021-02-19 18:51:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:51:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 [2021-02-19 18:51:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:18,062 INFO L225 Difference]: With dead ends: 552 [2021-02-19 18:51:18,062 INFO L226 Difference]: Without dead ends: 537 [2021-02-19 18:51:18,062 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-02-19 18:51:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2021-02-19 18:51:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2021-02-19 18:51:18,082 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2021-02-19 18:51:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:18,082 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2021-02-19 18:51:18,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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) [2021-02-19 18:51:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2021-02-19 18:51:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:18,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:18,084 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:18,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 18:51:18,306 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:18,306 INFO L82 PathProgramCache]: Analyzing trace with hash -910257128, now seen corresponding path program 1 times [2021-02-19 18:51:18,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:18,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172007104] [2021-02-19 18:51:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172007104] [2021-02-19 18:51:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685992365] [2021-02-19 18:51:18,566 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) [2021-02-19 18:51:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:18,759 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-02-19 18:51:18,759 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-02-19 18:51:18,769 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:18,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:18,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:18,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-02-19 18:51:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:18,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:18,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-02-19 18:51:18,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376242404] [2021-02-19 18:51:18,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:51:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:51:18,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:51:18,800 INFO L87 Difference]: Start difference. First operand 372 states and 1106 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) [2021-02-19 18:51:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:19,323 INFO L93 Difference]: Finished difference Result 586 states and 1678 transitions. [2021-02-19 18:51:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:51:19,323 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 24 [2021-02-19 18:51:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:19,326 INFO L225 Difference]: With dead ends: 586 [2021-02-19 18:51:19,326 INFO L226 Difference]: Without dead ends: 571 [2021-02-19 18:51:19,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-02-19 18:51:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-02-19 18:51:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2021-02-19 18:51:19,337 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2021-02-19 18:51:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:19,338 INFO L480 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2021-02-19 18:51:19,338 INFO L481 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) [2021-02-19 18:51:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2021-02-19 18:51:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:19,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:19,339 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:19,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:19,561 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash -705108166, now seen corresponding path program 2 times [2021-02-19 18:51:19,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:19,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449766562] [2021-02-19 18:51:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449766562] [2021-02-19 18:51:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903576913] [2021-02-19 18:51:19,767 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:19,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:51:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:19,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:19,909 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-02-19 18:51:19,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:51:19,947 INFO L628 ElimStorePlain]: treesize reduction 7, result has 73.1 percent of original size [2021-02-19 18:51:19,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:19,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-02-19 18:51:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:20,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:20,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-02-19 18:51:20,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741904514] [2021-02-19 18:51:20,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:51:20,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:20,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:51:20,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:51:20,020 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:20,989 INFO L93 Difference]: Finished difference Result 843 states and 2410 transitions. [2021-02-19 18:51:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:20,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:20,995 INFO L225 Difference]: With dead ends: 843 [2021-02-19 18:51:20,995 INFO L226 Difference]: Without dead ends: 828 [2021-02-19 18:51:20,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:51:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-02-19 18:51:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 439. [2021-02-19 18:51:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2021-02-19 18:51:21,008 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2021-02-19 18:51:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:21,009 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2021-02-19 18:51:21,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2021-02-19 18:51:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:21,010 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:21,010 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:21,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:51:21,226 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2094185771, now seen corresponding path program 2 times [2021-02-19 18:51:21,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:21,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156145996] [2021-02-19 18:51:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:21,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156145996] [2021-02-19 18:51:21,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051833829] [2021-02-19 18:51:21,281 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 [2021-02-19 18:51:21,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:51:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:21,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:21,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:21,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:51:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:21,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:21,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:51:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182986526] [2021-02-19 18:51:21,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:51:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:51:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:51:21,389 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-02-19 18:51:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:21,462 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2021-02-19 18:51:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:51:21,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 24 [2021-02-19 18:51:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:21,466 INFO L225 Difference]: With dead ends: 645 [2021-02-19 18:51:21,466 INFO L226 Difference]: Without dead ends: 630 [2021-02-19 18:51:21,466 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-02-19 18:51:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2021-02-19 18:51:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 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) [2021-02-19 18:51:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2021-02-19 18:51:21,477 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2021-02-19 18:51:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:21,477 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2021-02-19 18:51:21,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-02-19 18:51:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2021-02-19 18:51:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:21,479 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:21,479 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:21,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:51:21,700 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1005307402, now seen corresponding path program 3 times [2021-02-19 18:51:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:21,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952727332] [2021-02-19 18:51:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:21,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952727332] [2021-02-19 18:51:21,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817874149] [2021-02-19 18:51:21,906 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 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 [2021-02-19 18:51:21,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:51:21,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:51:21,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:22,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:22,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-02-19 18:51:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:22,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:22,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-02-19 18:51:22,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764460669] [2021-02-19 18:51:22,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:22,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:22,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:22,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:22,100 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-02-19 18:51:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:22,296 INFO L93 Difference]: Finished difference Result 592 states and 1679 transitions. [2021-02-19 18:51:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:51:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-02-19 18:51:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:22,298 INFO L225 Difference]: With dead ends: 592 [2021-02-19 18:51:22,298 INFO L226 Difference]: Without dead ends: 577 [2021-02-19 18:51:22,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:51:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-02-19 18:51:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-02-19 18:51:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2021-02-19 18:51:22,309 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2021-02-19 18:51:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:22,309 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2021-02-19 18:51:22,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-02-19 18:51:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2021-02-19 18:51:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:22,310 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:22,311 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:22,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:51:22,522 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1485784586, now seen corresponding path program 4 times [2021-02-19 18:51:22,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:22,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257529560] [2021-02-19 18:51:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:22,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257529560] [2021-02-19 18:51:22,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140523793] [2021-02-19 18:51:22,666 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 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 [2021-02-19 18:51:22,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:22,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:51:22,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:22,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:22,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:22,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-02-19 18:51:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:22,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:22,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:51:22,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127399662] [2021-02-19 18:51:22,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:22,827 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-02-19 18:51:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:23,007 INFO L93 Difference]: Finished difference Result 683 states and 1988 transitions. [2021-02-19 18:51:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:51:23,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 24 [2021-02-19 18:51:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:23,010 INFO L225 Difference]: With dead ends: 683 [2021-02-19 18:51:23,010 INFO L226 Difference]: Without dead ends: 668 [2021-02-19 18:51:23,010 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-02-19 18:51:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 469. [2021-02-19 18:51:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2021-02-19 18:51:23,021 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2021-02-19 18:51:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:23,021 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2021-02-19 18:51:23,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-02-19 18:51:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2021-02-19 18:51:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:23,022 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:23,022 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:23,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:23,238 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash 313218742, now seen corresponding path program 5 times [2021-02-19 18:51:23,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:23,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240066560] [2021-02-19 18:51:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:23,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240066560] [2021-02-19 18:51:23,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023241029] [2021-02-19 18:51:23,457 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:23,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:23,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:51:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:23,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,611 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 15 treesize of output 19 [2021-02-19 18:51:23,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:23,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:23,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:28 [2021-02-19 18:51:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:23,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:23,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 18:51:23,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30510052] [2021-02-19 18:51:23,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:23,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:23,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:23,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:23,713 INFO L87 Difference]: Start difference. First operand 469 states and 1381 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) [2021-02-19 18:51:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:24,138 INFO L93 Difference]: Finished difference Result 777 states and 2280 transitions. [2021-02-19 18:51:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:51:24,139 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 24 [2021-02-19 18:51:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:24,142 INFO L225 Difference]: With dead ends: 777 [2021-02-19 18:51:24,142 INFO L226 Difference]: Without dead ends: 762 [2021-02-19 18:51:24,142 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:51:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-02-19 18:51:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 471. [2021-02-19 18:51:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2021-02-19 18:51:24,154 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2021-02-19 18:51:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:24,154 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2021-02-19 18:51:24,154 INFO L481 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) [2021-02-19 18:51:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2021-02-19 18:51:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:24,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:24,155 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:24,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:24,374 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash 624895694, now seen corresponding path program 3 times [2021-02-19 18:51:24,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:24,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157741805] [2021-02-19 18:51:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157741805] [2021-02-19 18:51:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480024279] [2021-02-19 18:51:24,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:24,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:24,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:24,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:24,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:24,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752679135] [2021-02-19 18:51:24,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:24,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:24,581 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:25,389 INFO L93 Difference]: Finished difference Result 2301 states and 6530 transitions. [2021-02-19 18:51:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:51:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:25,398 INFO L225 Difference]: With dead ends: 2301 [2021-02-19 18:51:25,399 INFO L226 Difference]: Without dead ends: 2301 [2021-02-19 18:51:25,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=1664, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:51:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-02-19 18:51:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 593. [2021-02-19 18:51:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.170608108108108) internal successors, (1877), 592 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1877 transitions. [2021-02-19 18:51:25,429 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1877 transitions. Word has length 27 [2021-02-19 18:51:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:25,430 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1877 transitions. [2021-02-19 18:51:25,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1877 transitions. [2021-02-19 18:51:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:25,432 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:25,432 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:25,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:25,648 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:25,648 INFO L82 PathProgramCache]: Analyzing trace with hash 430995026, now seen corresponding path program 4 times [2021-02-19 18:51:25,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:25,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730011971] [2021-02-19 18:51:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:25,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730011971] [2021-02-19 18:51:25,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432832325] [2021-02-19 18:51:25,694 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 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 [2021-02-19 18:51:25,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:25,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:25,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101902353] [2021-02-19 18:51:25,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:25,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:25,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:25,830 INFO L87 Difference]: Start difference. First operand 593 states and 1877 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:26,502 INFO L93 Difference]: Finished difference Result 2258 states and 6445 transitions. [2021-02-19 18:51:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:51:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:26,511 INFO L225 Difference]: With dead ends: 2258 [2021-02-19 18:51:26,511 INFO L226 Difference]: Without dead ends: 2258 [2021-02-19 18:51:26,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:51:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-02-19 18:51:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 577. [2021-02-19 18:51:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1354166666666665) internal successors, (1806), 576 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1806 transitions. [2021-02-19 18:51:26,535 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1806 transitions. Word has length 27 [2021-02-19 18:51:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:26,535 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1806 transitions. [2021-02-19 18:51:26,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1806 transitions. [2021-02-19 18:51:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:26,538 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:26,538 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:26,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:51:26,750 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1046659342, now seen corresponding path program 5 times [2021-02-19 18:51:26,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:26,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26425106] [2021-02-19 18:51:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:26,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26425106] [2021-02-19 18:51:26,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012110751] [2021-02-19 18:51:26,814 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 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 [2021-02-19 18:51:26,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:26,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:26,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:26,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:26,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320667045] [2021-02-19 18:51:26,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:26,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:26,951 INFO L87 Difference]: Start difference. First operand 577 states and 1806 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-02-19 18:51:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:27,343 INFO L93 Difference]: Finished difference Result 1609 states and 4647 transitions. [2021-02-19 18:51:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:51:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 [2021-02-19 18:51:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:27,348 INFO L225 Difference]: With dead ends: 1609 [2021-02-19 18:51:27,348 INFO L226 Difference]: Without dead ends: 1609 [2021-02-19 18:51:27,349 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:51:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-02-19 18:51:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 585. [2021-02-19 18:51:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.125) internal successors, (1825), 584 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1825 transitions. [2021-02-19 18:51:27,365 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1825 transitions. Word has length 27 [2021-02-19 18:51:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:27,365 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1825 transitions. [2021-02-19 18:51:27,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-02-19 18:51:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1825 transitions. [2021-02-19 18:51:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:27,367 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:27,367 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:27,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:27,586 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -936578269, now seen corresponding path program 6 times [2021-02-19 18:51:27,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:27,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438520036] [2021-02-19 18:51:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:27,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438520036] [2021-02-19 18:51:27,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051350334] [2021-02-19 18:51:27,627 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 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 [2021-02-19 18:51:27,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:27,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:27,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:27,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:27,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316256134] [2021-02-19 18:51:27,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:27,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:27,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:27,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:27,751 INFO L87 Difference]: Start difference. First operand 585 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-02-19 18:51:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:28,148 INFO L93 Difference]: Finished difference Result 1639 states and 4720 transitions. [2021-02-19 18:51:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:51:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-02-19 18:51:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:28,152 INFO L225 Difference]: With dead ends: 1639 [2021-02-19 18:51:28,152 INFO L226 Difference]: Without dead ends: 1639 [2021-02-19 18:51:28,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:51:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-02-19 18:51:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 596. [2021-02-19 18:51:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.104201680672269) internal successors, (1847), 595 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1847 transitions. [2021-02-19 18:51:28,175 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1847 transitions. Word has length 27 [2021-02-19 18:51:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:28,175 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 1847 transitions. [2021-02-19 18:51:28,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-02-19 18:51:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1847 transitions. [2021-02-19 18:51:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:28,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:28,177 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:28,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 18:51:28,382 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash -516845365, now seen corresponding path program 6 times [2021-02-19 18:51:28,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:28,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388501582] [2021-02-19 18:51:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388501582] [2021-02-19 18:51:28,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901293579] [2021-02-19 18:51:28,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:28,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:28,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:28,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 18:51:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3952984] [2021-02-19 18:51:28,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:28,514 INFO L87 Difference]: Start difference. First operand 596 states and 1847 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-02-19 18:51:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:28,644 INFO L93 Difference]: Finished difference Result 1374 states and 4109 transitions. [2021-02-19 18:51:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:51:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 27 [2021-02-19 18:51:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:28,651 INFO L225 Difference]: With dead ends: 1374 [2021-02-19 18:51:28,652 INFO L226 Difference]: Without dead ends: 1350 [2021-02-19 18:51:28,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-02-19 18:51:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 911. [2021-02-19 18:51:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.197802197802198) internal successors, (2910), 910 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2910 transitions. [2021-02-19 18:51:28,671 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2910 transitions. Word has length 27 [2021-02-19 18:51:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:28,671 INFO L480 AbstractCegarLoop]: Abstraction has 911 states and 2910 transitions. [2021-02-19 18:51:28,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-02-19 18:51:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2910 transitions. [2021-02-19 18:51:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:28,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:28,674 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:28,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:51:28,890 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1464873792, now seen corresponding path program 1 times [2021-02-19 18:51:28,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:28,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706805684] [2021-02-19 18:51:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706805684] [2021-02-19 18:51:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919021961] [2021-02-19 18:51:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 18:51:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:29,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:29,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 18:51:29,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466906010] [2021-02-19 18:51:29,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:29,027 INFO L87 Difference]: Start difference. First operand 911 states and 2910 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:29,297 INFO L93 Difference]: Finished difference Result 1491 states and 4323 transitions. [2021-02-19 18:51:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:29,299 INFO L225 Difference]: With dead ends: 1491 [2021-02-19 18:51:29,299 INFO L226 Difference]: Without dead ends: 1465 [2021-02-19 18:51:29,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-02-19 18:51:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 969. [2021-02-19 18:51:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.145661157024793) internal successors, (3045), 968 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3045 transitions. [2021-02-19 18:51:29,320 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3045 transitions. Word has length 27 [2021-02-19 18:51:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:29,320 INFO L480 AbstractCegarLoop]: Abstraction has 969 states and 3045 transitions. [2021-02-19 18:51:29,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3045 transitions. [2021-02-19 18:51:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:29,322 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:29,323 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:29,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:51:29,538 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1910142261, now seen corresponding path program 7 times [2021-02-19 18:51:29,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:29,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022652220] [2021-02-19 18:51:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022652220] [2021-02-19 18:51:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461059304] [2021-02-19 18:51:29,582 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 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 [2021-02-19 18:51:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:29,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:29,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:51:29,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496551192] [2021-02-19 18:51:29,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:29,699 INFO L87 Difference]: Start difference. First operand 969 states and 3045 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:29,897 INFO L93 Difference]: Finished difference Result 1664 states and 5013 transitions. [2021-02-19 18:51:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:51:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:29,901 INFO L225 Difference]: With dead ends: 1664 [2021-02-19 18:51:29,901 INFO L226 Difference]: Without dead ends: 1632 [2021-02-19 18:51:29,901 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:51:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-02-19 18:51:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1122. [2021-02-19 18:51:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.1793041926851027) internal successors, (3564), 1121 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3564 transitions. [2021-02-19 18:51:29,924 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3564 transitions. Word has length 27 [2021-02-19 18:51:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:29,925 INFO L480 AbstractCegarLoop]: Abstraction has 1122 states and 3564 transitions. [2021-02-19 18:51:29,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3564 transitions. [2021-02-19 18:51:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:29,927 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:29,927 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:30,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:51:30,148 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash -318696410, now seen corresponding path program 2 times [2021-02-19 18:51:30,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:30,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070909505] [2021-02-19 18:51:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070909505] [2021-02-19 18:51:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581035206] [2021-02-19 18:51:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:30,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:30,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:30,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 18:51:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082025889] [2021-02-19 18:51:30,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:30,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:30,272 INFO L87 Difference]: Start difference. First operand 1122 states and 3564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:30,502 INFO L93 Difference]: Finished difference Result 1812 states and 5305 transitions. [2021-02-19 18:51:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 27 [2021-02-19 18:51:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:30,505 INFO L225 Difference]: With dead ends: 1812 [2021-02-19 18:51:30,505 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 18:51:30,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 18:51:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1115. [2021-02-19 18:51:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.1867145421903054) internal successors, (3550), 1114 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3550 transitions. [2021-02-19 18:51:30,527 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3550 transitions. Word has length 27 [2021-02-19 18:51:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:30,528 INFO L480 AbstractCegarLoop]: Abstraction has 1115 states and 3550 transitions. [2021-02-19 18:51:30,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3550 transitions. [2021-02-19 18:51:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:30,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:30,530 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:30,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:30,751 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash 589110020, now seen corresponding path program 3 times [2021-02-19 18:51:30,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:30,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416697730] [2021-02-19 18:51:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416697730] [2021-02-19 18:51:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382398036] [2021-02-19 18:51:30,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:30,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:51:30,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:30,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:30,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:51:30,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183247184] [2021-02-19 18:51:30,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:30,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:30,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:30,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:30,901 INFO L87 Difference]: Start difference. First operand 1115 states and 3550 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:31,183 INFO L93 Difference]: Finished difference Result 2086 states and 6158 transitions. [2021-02-19 18:51:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-02-19 18:51:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:31,188 INFO L225 Difference]: With dead ends: 2086 [2021-02-19 18:51:31,188 INFO L226 Difference]: Without dead ends: 2060 [2021-02-19 18:51:31,188 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-02-19 18:51:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1141. [2021-02-19 18:51:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.207894736842105) internal successors, (3657), 1140 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3657 transitions. [2021-02-19 18:51:31,227 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3657 transitions. Word has length 27 [2021-02-19 18:51:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:31,228 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3657 transitions. [2021-02-19 18:51:31,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3657 transitions. [2021-02-19 18:51:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:31,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:31,230 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:31,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 18:51:31,454 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2093003823, now seen corresponding path program 7 times [2021-02-19 18:51:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:31,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626634408] [2021-02-19 18:51:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:31,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626634408] [2021-02-19 18:51:31,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131586839] [2021-02-19 18:51:31,484 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 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 [2021-02-19 18:51:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:31,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:31,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:31,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 18:51:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303161017] [2021-02-19 18:51:31,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:31,560 INFO L87 Difference]: Start difference. First operand 1141 states and 3657 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:31,727 INFO L93 Difference]: Finished difference Result 1777 states and 5270 transitions. [2021-02-19 18:51:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:31,732 INFO L225 Difference]: With dead ends: 1777 [2021-02-19 18:51:31,732 INFO L226 Difference]: Without dead ends: 1777 [2021-02-19 18:51:31,732 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-02-19 18:51:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1147. [2021-02-19 18:51:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.1928446771378707) internal successors, (3659), 1146 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3659 transitions. [2021-02-19 18:51:31,758 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3659 transitions. Word has length 27 [2021-02-19 18:51:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:31,758 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 3659 transitions. [2021-02-19 18:51:31,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3659 transitions. [2021-02-19 18:51:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:31,761 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:31,761 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:31,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 18:51:31,974 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1746424686, now seen corresponding path program 8 times [2021-02-19 18:51:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:31,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290313179] [2021-02-19 18:51:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:32,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290313179] [2021-02-19 18:51:32,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282278564] [2021-02-19 18:51:32,016 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 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 [2021-02-19 18:51:32,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:32,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:32,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:32,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:32,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:32,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:51:32,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753352732] [2021-02-19 18:51:32,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:32,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:32,107 INFO L87 Difference]: Start difference. First operand 1147 states and 3659 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:32,690 INFO L93 Difference]: Finished difference Result 4076 states and 11819 transitions. [2021-02-19 18:51:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:51:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 27 [2021-02-19 18:51:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:32,723 INFO L225 Difference]: With dead ends: 4076 [2021-02-19 18:51:32,723 INFO L226 Difference]: Without dead ends: 4076 [2021-02-19 18:51:32,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:51:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-02-19 18:51:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 1262. [2021-02-19 18:51:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.274385408406027) internal successors, (4129), 1261 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) [2021-02-19 18:51:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4129 transitions. [2021-02-19 18:51:32,772 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4129 transitions. Word has length 27 [2021-02-19 18:51:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:32,772 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 4129 transitions. [2021-02-19 18:51:32,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4129 transitions. [2021-02-19 18:51:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:32,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:32,775 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:32,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:32,990 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash -565862554, now seen corresponding path program 4 times [2021-02-19 18:51:32,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:32,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194891714] [2021-02-19 18:51:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194891714] [2021-02-19 18:51:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478045511] [2021-02-19 18:51:33,038 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:33,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:33,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:33,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:51:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583218340] [2021-02-19 18:51:33,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:33,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:33,137 INFO L87 Difference]: Start difference. First operand 1262 states and 4129 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:33,369 INFO L93 Difference]: Finished difference Result 2048 states and 6254 transitions. [2021-02-19 18:51:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-02-19 18:51:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:33,372 INFO L225 Difference]: With dead ends: 2048 [2021-02-19 18:51:33,372 INFO L226 Difference]: Without dead ends: 2048 [2021-02-19 18:51:33,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-02-19 18:51:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1280. [2021-02-19 18:51:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2752150117279126) internal successors, (4189), 1279 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4189 transitions. [2021-02-19 18:51:33,397 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4189 transitions. Word has length 27 [2021-02-19 18:51:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:33,398 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 4189 transitions. [2021-02-19 18:51:33,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4189 transitions. [2021-02-19 18:51:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:33,400 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:33,400 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:33,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 18:51:33,621 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1557206388, now seen corresponding path program 9 times [2021-02-19 18:51:33,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:33,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377416369] [2021-02-19 18:51:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377416369] [2021-02-19 18:51:33,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832782247] [2021-02-19 18:51:33,664 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 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 [2021-02-19 18:51:33,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:51:33,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:33,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:51:33,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585522469] [2021-02-19 18:51:33,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:33,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:33,742 INFO L87 Difference]: Start difference. First operand 1280 states and 4189 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:34,243 INFO L93 Difference]: Finished difference Result 3885 states and 11397 transitions. [2021-02-19 18:51:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:51:34,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 27 [2021-02-19 18:51:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:34,248 INFO L225 Difference]: With dead ends: 3885 [2021-02-19 18:51:34,248 INFO L226 Difference]: Without dead ends: 3877 [2021-02-19 18:51:34,249 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:51:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2021-02-19 18:51:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1292. [2021-02-19 18:51:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.260263361735089) internal successors, (4209), 1291 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4209 transitions. [2021-02-19 18:51:34,287 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4209 transitions. Word has length 27 [2021-02-19 18:51:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:34,287 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4209 transitions. [2021-02-19 18:51:34,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4209 transitions. [2021-02-19 18:51:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:34,290 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:34,290 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:34,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:34,511 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1348239692, now seen corresponding path program 10 times [2021-02-19 18:51:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:34,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017434442] [2021-02-19 18:51:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:34,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017434442] [2021-02-19 18:51:34,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647371382] [2021-02-19 18:51:34,550 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 [2021-02-19 18:51:34,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:34,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:34,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:34,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 18:51:34,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752073269] [2021-02-19 18:51:34,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:34,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:34,671 INFO L87 Difference]: Start difference. First operand 1292 states and 4209 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:35,301 INFO L93 Difference]: Finished difference Result 3967 states and 11593 transitions. [2021-02-19 18:51:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:51:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-02-19 18:51:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:35,306 INFO L225 Difference]: With dead ends: 3967 [2021-02-19 18:51:35,306 INFO L226 Difference]: Without dead ends: 3967 [2021-02-19 18:51:35,306 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:51:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-02-19 18:51:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1392. [2021-02-19 18:51:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.250179726815241) internal successors, (4521), 1391 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4521 transitions. [2021-02-19 18:51:35,357 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4521 transitions. Word has length 27 [2021-02-19 18:51:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:35,357 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4521 transitions. [2021-02-19 18:51:35,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4521 transitions. [2021-02-19 18:51:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:35,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:35,360 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:35,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:51:35,568 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash 434409778, now seen corresponding path program 11 times [2021-02-19 18:51:35,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:35,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426351716] [2021-02-19 18:51:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:35,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426351716] [2021-02-19 18:51:35,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599138597] [2021-02-19 18:51:35,604 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) [2021-02-19 18:51:35,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:35,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:35,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 18:51:35,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424105792] [2021-02-19 18:51:35,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:35,731 INFO L87 Difference]: Start difference. First operand 1392 states and 4521 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:36,336 INFO L93 Difference]: Finished difference Result 3712 states and 10972 transitions. [2021-02-19 18:51:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:51:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-02-19 18:51:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:36,342 INFO L225 Difference]: With dead ends: 3712 [2021-02-19 18:51:36,342 INFO L226 Difference]: Without dead ends: 3704 [2021-02-19 18:51:36,342 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:51:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-02-19 18:51:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1392. [2021-02-19 18:51:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2473040977713876) internal successors, (4517), 1391 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4517 transitions. [2021-02-19 18:51:36,369 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4517 transitions. Word has length 27 [2021-02-19 18:51:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:36,369 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4517 transitions. [2021-02-19 18:51:36,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4517 transitions. [2021-02-19 18:51:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:36,372 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:36,372 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:36,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:51:36,581 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1649552750, now seen corresponding path program 12 times [2021-02-19 18:51:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:36,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287198301] [2021-02-19 18:51:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287198301] [2021-02-19 18:51:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229861904] [2021-02-19 18:51:36,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:36,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:51:36,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:36,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:36,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:36,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:36,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635530368] [2021-02-19 18:51:36,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:36,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:36,714 INFO L87 Difference]: Start difference. First operand 1392 states and 4517 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:51:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:37,056 INFO L93 Difference]: Finished difference Result 3014 states and 9077 transitions. [2021-02-19 18:51:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:51:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-02-19 18:51:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:37,060 INFO L225 Difference]: With dead ends: 3014 [2021-02-19 18:51:37,060 INFO L226 Difference]: Without dead ends: 3014 [2021-02-19 18:51:37,060 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:51:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-02-19 18:51:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1410. [2021-02-19 18:51:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2462739531582683) internal successors, (4574), 1409 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4574 transitions. [2021-02-19 18:51:37,083 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4574 transitions. Word has length 27 [2021-02-19 18:51:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:37,084 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4574 transitions. [2021-02-19 18:51:37,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:51:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4574 transitions. [2021-02-19 18:51:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:37,086 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:37,086 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:37,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:51:37,306 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash 751419237, now seen corresponding path program 8 times [2021-02-19 18:51:37,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:37,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184743185] [2021-02-19 18:51:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:37,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184743185] [2021-02-19 18:51:37,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051335815] [2021-02-19 18:51:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:37,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:37,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:37,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:37,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:37,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:37,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602302529] [2021-02-19 18:51:37,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:37,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:37,423 INFO L87 Difference]: Start difference. First operand 1410 states and 4574 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:37,720 INFO L93 Difference]: Finished difference Result 3028 states and 9102 transitions. [2021-02-19 18:51:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:51:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-02-19 18:51:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:37,724 INFO L225 Difference]: With dead ends: 3028 [2021-02-19 18:51:37,724 INFO L226 Difference]: Without dead ends: 3028 [2021-02-19 18:51:37,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:51:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-02-19 18:51:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1426. [2021-02-19 18:51:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.2435087719298243) internal successors, (4622), 1425 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4622 transitions. [2021-02-19 18:51:37,754 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4622 transitions. Word has length 27 [2021-02-19 18:51:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:37,755 INFO L480 AbstractCegarLoop]: Abstraction has 1426 states and 4622 transitions. [2021-02-19 18:51:37,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4622 transitions. [2021-02-19 18:51:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:37,757 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:37,757 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:37,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 18:51:37,977 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 663694865, now seen corresponding path program 9 times [2021-02-19 18:51:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:37,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298742839] [2021-02-19 18:51:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:38,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298742839] [2021-02-19 18:51:38,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066702838] [2021-02-19 18:51:38,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:38,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:38,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:38,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:38,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759273585] [2021-02-19 18:51:38,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:38,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:38,108 INFO L87 Difference]: Start difference. First operand 1426 states and 4622 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:38,566 INFO L93 Difference]: Finished difference Result 3515 states and 10389 transitions. [2021-02-19 18:51:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:51:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-02-19 18:51:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:38,572 INFO L225 Difference]: With dead ends: 3515 [2021-02-19 18:51:38,572 INFO L226 Difference]: Without dead ends: 3515 [2021-02-19 18:51:38,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:51:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-02-19 18:51:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1494. [2021-02-19 18:51:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.2391158740790353) internal successors, (4836), 1493 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4836 transitions. [2021-02-19 18:51:38,611 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4836 transitions. Word has length 27 [2021-02-19 18:51:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:38,611 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 4836 transitions. [2021-02-19 18:51:38,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4836 transitions. [2021-02-19 18:51:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:38,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:38,614 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:38,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:51:38,830 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:38,830 INFO L82 PathProgramCache]: Analyzing trace with hash 336364589, now seen corresponding path program 10 times [2021-02-19 18:51:38,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:38,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826124326] [2021-02-19 18:51:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:38,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826124326] [2021-02-19 18:51:38,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873125560] [2021-02-19 18:51:38,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:38,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:38,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:38,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:38,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:51:38,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269826481] [2021-02-19 18:51:38,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:38,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:38,997 INFO L87 Difference]: Start difference. First operand 1494 states and 4836 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:39,277 INFO L93 Difference]: Finished difference Result 3812 states and 11703 transitions. [2021-02-19 18:51:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:39,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:39,282 INFO L225 Difference]: With dead ends: 3812 [2021-02-19 18:51:39,282 INFO L226 Difference]: Without dead ends: 3805 [2021-02-19 18:51:39,282 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:51:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-02-19 18:51:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2152. [2021-02-19 18:51:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3421664342166433) internal successors, (7189), 2151 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7189 transitions. [2021-02-19 18:51:39,341 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7189 transitions. Word has length 27 [2021-02-19 18:51:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:39,341 INFO L480 AbstractCegarLoop]: Abstraction has 2152 states and 7189 transitions. [2021-02-19 18:51:39,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7189 transitions. [2021-02-19 18:51:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:39,345 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:39,345 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:39,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:39,566 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1285662279, now seen corresponding path program 11 times [2021-02-19 18:51:39,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:39,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050493792] [2021-02-19 18:51:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:39,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050493792] [2021-02-19 18:51:39,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675337773] [2021-02-19 18:51:39,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:39,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:39,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:39,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:39,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:39,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:51:39,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770200017] [2021-02-19 18:51:39,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:39,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:39,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:39,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:39,716 INFO L87 Difference]: Start difference. First operand 2152 states and 7189 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-02-19 18:51:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:40,054 INFO L93 Difference]: Finished difference Result 3889 states and 11952 transitions. [2021-02-19 18:51:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 27 [2021-02-19 18:51:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:40,058 INFO L225 Difference]: With dead ends: 3889 [2021-02-19 18:51:40,058 INFO L226 Difference]: Without dead ends: 3889 [2021-02-19 18:51:40,059 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:51:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-02-19 18:51:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2116. [2021-02-19 18:51:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.315839243498818) internal successors, (7013), 2115 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:40,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7013 transitions. [2021-02-19 18:51:40,089 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7013 transitions. Word has length 27 [2021-02-19 18:51:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:40,089 INFO L480 AbstractCegarLoop]: Abstraction has 2116 states and 7013 transitions. [2021-02-19 18:51:40,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-02-19 18:51:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7013 transitions. [2021-02-19 18:51:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:40,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:40,092 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:40,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:40,292 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash -886236075, now seen corresponding path program 12 times [2021-02-19 18:51:40,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:40,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686709735] [2021-02-19 18:51:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:40,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686709735] [2021-02-19 18:51:40,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013935125] [2021-02-19 18:51:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:40,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:40,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:40,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:40,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185301185] [2021-02-19 18:51:40,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:40,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:40,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:40,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:40,417 INFO L87 Difference]: Start difference. First operand 2116 states and 7013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:40,817 INFO L93 Difference]: Finished difference Result 3915 states and 12164 transitions. [2021-02-19 18:51:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:51:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-02-19 18:51:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:40,822 INFO L225 Difference]: With dead ends: 3915 [2021-02-19 18:51:40,822 INFO L226 Difference]: Without dead ends: 3911 [2021-02-19 18:51:40,823 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:51:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-02-19 18:51:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2114. [2021-02-19 18:51:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.313771888310459) internal successors, (7002), 2113 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7002 transitions. [2021-02-19 18:51:40,856 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7002 transitions. Word has length 27 [2021-02-19 18:51:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:40,856 INFO L480 AbstractCegarLoop]: Abstraction has 2114 states and 7002 transitions. [2021-02-19 18:51:40,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7002 transitions. [2021-02-19 18:51:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:40,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:40,860 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:41,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 18:51:41,073 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 759440852, now seen corresponding path program 5 times [2021-02-19 18:51:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:41,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152493451] [2021-02-19 18:51:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152493451] [2021-02-19 18:51:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688303317] [2021-02-19 18:51:41,102 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 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 [2021-02-19 18:51:41,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:41,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:41,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 18:51:41,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106399030] [2021-02-19 18:51:41,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:41,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:41,199 INFO L87 Difference]: Start difference. First operand 2114 states and 7002 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:41,483 INFO L93 Difference]: Finished difference Result 3295 states and 10178 transitions. [2021-02-19 18:51:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:51:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:41,487 INFO L225 Difference]: With dead ends: 3295 [2021-02-19 18:51:41,487 INFO L226 Difference]: Without dead ends: 3280 [2021-02-19 18:51:41,488 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:51:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-02-19 18:51:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2176. [2021-02-19 18:51:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.331494252873563) internal successors, (7246), 2175 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7246 transitions. [2021-02-19 18:51:41,519 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7246 transitions. Word has length 27 [2021-02-19 18:51:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:41,519 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 7246 transitions. [2021-02-19 18:51:41,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7246 transitions. [2021-02-19 18:51:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:41,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:41,522 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:41,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:41,722 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1008285072, now seen corresponding path program 6 times [2021-02-19 18:51:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:41,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472695242] [2021-02-19 18:51:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:41,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472695242] [2021-02-19 18:51:41,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307943343] [2021-02-19 18:51:41,760 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 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 [2021-02-19 18:51:41,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:51:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:41,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:41,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 18:51:41,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335057582] [2021-02-19 18:51:41,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:41,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:41,867 INFO L87 Difference]: Start difference. First operand 2176 states and 7246 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:42,189 INFO L93 Difference]: Finished difference Result 3360 states and 10395 transitions. [2021-02-19 18:51:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:51:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:42,195 INFO L225 Difference]: With dead ends: 3360 [2021-02-19 18:51:42,195 INFO L226 Difference]: Without dead ends: 3360 [2021-02-19 18:51:42,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:51:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-02-19 18:51:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2143. [2021-02-19 18:51:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.316526610644258) internal successors, (7104), 2142 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7104 transitions. [2021-02-19 18:51:42,230 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7104 transitions. Word has length 27 [2021-02-19 18:51:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:42,230 INFO L480 AbstractCegarLoop]: Abstraction has 2143 states and 7104 transitions. [2021-02-19 18:51:42,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7104 transitions. [2021-02-19 18:51:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:42,233 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:42,233 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:42,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 18:51:42,433 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1178969877, now seen corresponding path program 13 times [2021-02-19 18:51:42,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:42,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735654820] [2021-02-19 18:51:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735654820] [2021-02-19 18:51:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525988933] [2021-02-19 18:51:42,469 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 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 [2021-02-19 18:51:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:42,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:42,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:42,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027992426] [2021-02-19 18:51:42,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:42,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:42,573 INFO L87 Difference]: Start difference. First operand 2143 states and 7104 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:43,381 INFO L93 Difference]: Finished difference Result 6236 states and 18781 transitions. [2021-02-19 18:51:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:51:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:43,389 INFO L225 Difference]: With dead ends: 6236 [2021-02-19 18:51:43,389 INFO L226 Difference]: Without dead ends: 6236 [2021-02-19 18:51:43,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:51:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-02-19 18:51:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 2154. [2021-02-19 18:51:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 3.32559219693451) internal successors, (7160), 2153 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 7160 transitions. [2021-02-19 18:51:43,432 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 7160 transitions. Word has length 27 [2021-02-19 18:51:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:43,432 INFO L480 AbstractCegarLoop]: Abstraction has 2154 states and 7160 transitions. [2021-02-19 18:51:43,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 7160 transitions. [2021-02-19 18:51:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:43,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:43,436 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:43,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:43,636 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 985069209, now seen corresponding path program 14 times [2021-02-19 18:51:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:43,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909210505] [2021-02-19 18:51:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909210505] [2021-02-19 18:51:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986665379] [2021-02-19 18:51:43,675 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:43,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:43,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:43,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:43,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:43,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762353092] [2021-02-19 18:51:43,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:43,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:43,803 INFO L87 Difference]: Start difference. First operand 2154 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:44,622 INFO L93 Difference]: Finished difference Result 6112 states and 18481 transitions. [2021-02-19 18:51:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:51:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:44,629 INFO L225 Difference]: With dead ends: 6112 [2021-02-19 18:51:44,629 INFO L226 Difference]: Without dead ends: 6112 [2021-02-19 18:51:44,630 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:51:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-02-19 18:51:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 2135. [2021-02-19 18:51:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.3130271790065606) internal successors, (7070), 2134 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7070 transitions. [2021-02-19 18:51:44,671 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7070 transitions. Word has length 27 [2021-02-19 18:51:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:44,671 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 7070 transitions. [2021-02-19 18:51:44,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7070 transitions. [2021-02-19 18:51:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:44,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:44,674 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:44,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 18:51:44,875 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1761272030, now seen corresponding path program 7 times [2021-02-19 18:51:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:44,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819524168] [2021-02-19 18:51:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819524168] [2021-02-19 18:51:44,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889870612] [2021-02-19 18:51:44,906 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 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 [2021-02-19 18:51:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:44,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:44,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:44,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:51:44,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519926192] [2021-02-19 18:51:44,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:44,991 INFO L87 Difference]: Start difference. First operand 2135 states and 7070 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:45,195 INFO L93 Difference]: Finished difference Result 3444 states and 10974 transitions. [2021-02-19 18:51:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-02-19 18:51:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:45,201 INFO L225 Difference]: With dead ends: 3444 [2021-02-19 18:51:45,201 INFO L226 Difference]: Without dead ends: 3418 [2021-02-19 18:51:45,201 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-02-19 18:51:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2593. [2021-02-19 18:51:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.3599537037037037) internal successors, (8709), 2592 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8709 transitions. [2021-02-19 18:51:45,250 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8709 transitions. Word has length 27 [2021-02-19 18:51:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:45,250 INFO L480 AbstractCegarLoop]: Abstraction has 2593 states and 8709 transitions. [2021-02-19 18:51:45,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8709 transitions. [2021-02-19 18:51:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:45,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:45,254 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:45,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 18:51:45,470 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:45,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1378722692, now seen corresponding path program 8 times [2021-02-19 18:51:45,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:45,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849531874] [2021-02-19 18:51:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:45,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849531874] [2021-02-19 18:51:45,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693235057] [2021-02-19 18:51:45,499 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 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 [2021-02-19 18:51:45,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:45,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:45,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:45,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:51:45,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13250528] [2021-02-19 18:51:45,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:45,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:45,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:45,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:45,604 INFO L87 Difference]: Start difference. First operand 2593 states and 8709 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:45,778 INFO L93 Difference]: Finished difference Result 3554 states and 11351 transitions. [2021-02-19 18:51:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-02-19 18:51:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:45,782 INFO L225 Difference]: With dead ends: 3554 [2021-02-19 18:51:45,783 INFO L226 Difference]: Without dead ends: 3554 [2021-02-19 18:51:45,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-02-19 18:51:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2611. [2021-02-19 18:51:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.3555555555555556) internal successors, (8758), 2610 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 8758 transitions. [2021-02-19 18:51:45,831 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 8758 transitions. Word has length 27 [2021-02-19 18:51:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:45,831 INFO L480 AbstractCegarLoop]: Abstraction has 2611 states and 8758 transitions. [2021-02-19 18:51:45,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-02-19 18:51:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 8758 transitions. [2021-02-19 18:51:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:45,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:45,836 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:46,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 18:51:46,050 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash -242077942, now seen corresponding path program 13 times [2021-02-19 18:51:46,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:46,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577708589] [2021-02-19 18:51:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577708589] [2021-02-19 18:51:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254807353] [2021-02-19 18:51:46,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:46,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:46,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 18:51:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297107827] [2021-02-19 18:51:46,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:46,176 INFO L87 Difference]: Start difference. First operand 2611 states and 8758 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:46,768 INFO L93 Difference]: Finished difference Result 8012 states and 25327 transitions. [2021-02-19 18:51:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:51:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:46,777 INFO L225 Difference]: With dead ends: 8012 [2021-02-19 18:51:46,777 INFO L226 Difference]: Without dead ends: 8012 [2021-02-19 18:51:46,778 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:51:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-02-19 18:51:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3370. [2021-02-19 18:51:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 3.4579994063520334) internal successors, (11650), 3369 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 11650 transitions. [2021-02-19 18:51:46,870 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 11650 transitions. Word has length 27 [2021-02-19 18:51:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:46,871 INFO L480 AbstractCegarLoop]: Abstraction has 3370 states and 11650 transitions. [2021-02-19 18:51:46,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 11650 transitions. [2021-02-19 18:51:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:46,877 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:46,877 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:47,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 18:51:47,098 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash -435978610, now seen corresponding path program 14 times [2021-02-19 18:51:47,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:47,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209924687] [2021-02-19 18:51:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209924687] [2021-02-19 18:51:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725750446] [2021-02-19 18:51:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:47,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:47,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:47,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:47,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 18:51:47,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385663932] [2021-02-19 18:51:47,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:47,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:47,233 INFO L87 Difference]: Start difference. First operand 3370 states and 11650 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:47,838 INFO L93 Difference]: Finished difference Result 7985 states and 25267 transitions. [2021-02-19 18:51:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:51:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:47,847 INFO L225 Difference]: With dead ends: 7985 [2021-02-19 18:51:47,847 INFO L226 Difference]: Without dead ends: 7985 [2021-02-19 18:51:47,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:51:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-02-19 18:51:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 3369. [2021-02-19 18:51:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.4557600950118763) internal successors, (11639), 3368 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 11639 transitions. [2021-02-19 18:51:47,910 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 11639 transitions. Word has length 27 [2021-02-19 18:51:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:47,910 INFO L480 AbstractCegarLoop]: Abstraction has 3369 states and 11639 transitions. [2021-02-19 18:51:47,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 11639 transitions. [2021-02-19 18:51:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:47,915 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:47,915 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:48,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:48,115 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1232284685, now seen corresponding path program 15 times [2021-02-19 18:51:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:48,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096853338] [2021-02-19 18:51:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:48,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096853338] [2021-02-19 18:51:48,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206825081] [2021-02-19 18:51:48,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:48,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:51:48,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:48,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:48,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 18:51:48,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211756239] [2021-02-19 18:51:48,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:48,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:48,236 INFO L87 Difference]: Start difference. First operand 3369 states and 11639 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:48,396 INFO L93 Difference]: Finished difference Result 5144 states and 16955 transitions. [2021-02-19 18:51:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:51:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:48,402 INFO L225 Difference]: With dead ends: 5144 [2021-02-19 18:51:48,403 INFO L226 Difference]: Without dead ends: 5133 [2021-02-19 18:51:48,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-02-19 18:51:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3459. [2021-02-19 18:51:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.462695199537305) internal successors, (11974), 3458 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 11974 transitions. [2021-02-19 18:51:48,457 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 11974 transitions. Word has length 27 [2021-02-19 18:51:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:48,457 INFO L480 AbstractCegarLoop]: Abstraction has 3459 states and 11974 transitions. [2021-02-19 18:51:48,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 11974 transitions. [2021-02-19 18:51:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:48,463 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:48,463 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:48,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:48,672 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:48,672 INFO L82 PathProgramCache]: Analyzing trace with hash -461309239, now seen corresponding path program 16 times [2021-02-19 18:51:48,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:48,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219361799] [2021-02-19 18:51:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:48,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219361799] [2021-02-19 18:51:48,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064829170] [2021-02-19 18:51:48,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:48,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:48,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:48,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 18:51:48,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474551825] [2021-02-19 18:51:48,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:48,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:48,777 INFO L87 Difference]: Start difference. First operand 3459 states and 11974 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:48,978 INFO L93 Difference]: Finished difference Result 5400 states and 17684 transitions. [2021-02-19 18:51:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:51:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:48,984 INFO L225 Difference]: With dead ends: 5400 [2021-02-19 18:51:48,984 INFO L226 Difference]: Without dead ends: 5400 [2021-02-19 18:51:48,985 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:51:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-02-19 18:51:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 3354. [2021-02-19 18:51:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 3.4446764091858038) internal successors, (11550), 3353 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 11550 transitions. [2021-02-19 18:51:49,045 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 11550 transitions. Word has length 27 [2021-02-19 18:51:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:49,045 INFO L480 AbstractCegarLoop]: Abstraction has 3354 states and 11550 transitions. [2021-02-19 18:51:49,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 11550 transitions. [2021-02-19 18:51:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:49,049 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:49,049 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:49,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:49,249 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash -807888376, now seen corresponding path program 17 times [2021-02-19 18:51:49,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:49,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734107715] [2021-02-19 18:51:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734107715] [2021-02-19 18:51:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871728671] [2021-02-19 18:51:49,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:49,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:49,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:49,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:51:49,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898059752] [2021-02-19 18:51:49,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:49,423 INFO L87 Difference]: Start difference. First operand 3354 states and 11550 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:49,957 INFO L93 Difference]: Finished difference Result 7362 states and 23005 transitions. [2021-02-19 18:51:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:51:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 27 [2021-02-19 18:51:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:49,967 INFO L225 Difference]: With dead ends: 7362 [2021-02-19 18:51:49,967 INFO L226 Difference]: Without dead ends: 7362 [2021-02-19 18:51:49,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:51:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-02-19 18:51:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3368. [2021-02-19 18:51:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.4460944460944463) internal successors, (11603), 3367 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 11603 transitions. [2021-02-19 18:51:50,061 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 11603 transitions. Word has length 27 [2021-02-19 18:51:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:50,061 INFO L480 AbstractCegarLoop]: Abstraction has 3368 states and 11603 transitions. [2021-02-19 18:51:50,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 11603 transitions. [2021-02-19 18:51:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:50,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:50,067 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:50,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:50,282 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash -997106674, now seen corresponding path program 18 times [2021-02-19 18:51:50,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:50,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172159636] [2021-02-19 18:51:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172159636] [2021-02-19 18:51:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713816741] [2021-02-19 18:51:50,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:50,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:50,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:50,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:51:50,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137146091] [2021-02-19 18:51:50,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:50,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:50,401 INFO L87 Difference]: Start difference. First operand 3368 states and 11603 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:50,860 INFO L93 Difference]: Finished difference Result 7148 states and 22493 transitions. [2021-02-19 18:51:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:51:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 27 [2021-02-19 18:51:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:50,869 INFO L225 Difference]: With dead ends: 7148 [2021-02-19 18:51:50,869 INFO L226 Difference]: Without dead ends: 7140 [2021-02-19 18:51:50,869 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:51:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-02-19 18:51:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3360. [2021-02-19 18:51:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-02-19 18:51:50,931 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-02-19 18:51:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:50,931 INFO L480 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-02-19 18:51:50,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-02-19 18:51:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-02-19 18:51:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:50,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:50,935 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:51,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:51:51,136 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 392414542, now seen corresponding path program 19 times [2021-02-19 18:51:51,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:51,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815441907] [2021-02-19 18:51:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:51,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815441907] [2021-02-19 18:51:51,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468593626] [2021-02-19 18:51:51,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:51,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:51,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:51,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 18:51:51,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796497095] [2021-02-19 18:51:51,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:51,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:51,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:51,281 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:51,876 INFO L93 Difference]: Finished difference Result 7312 states and 22866 transitions. [2021-02-19 18:51:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:51:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-02-19 18:51:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:51,886 INFO L225 Difference]: With dead ends: 7312 [2021-02-19 18:51:51,886 INFO L226 Difference]: Without dead ends: 7312 [2021-02-19 18:51:51,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:51:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-02-19 18:51:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 3366. [2021-02-19 18:51:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.444873699851412) internal successors, (11592), 3365 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 11592 transitions. [2021-02-19 18:51:51,946 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 11592 transitions. Word has length 27 [2021-02-19 18:51:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:51,949 INFO L480 AbstractCegarLoop]: Abstraction has 3366 states and 11592 transitions. [2021-02-19 18:51:51,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 11592 transitions. [2021-02-19 18:51:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:51,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:51,954 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:52,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-02-19 18:51:52,154 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2119903284, now seen corresponding path program 20 times [2021-02-19 18:51:52,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:52,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68705152] [2021-02-19 18:51:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:52,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68705152] [2021-02-19 18:51:52,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927097072] [2021-02-19 18:51:52,189 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:52,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:52,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:52,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 18:51:52,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268138443] [2021-02-19 18:51:52,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:52,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:52,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:52,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:52,309 INFO L87 Difference]: Start difference. First operand 3366 states and 11592 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:52,871 INFO L93 Difference]: Finished difference Result 7159 states and 22507 transitions. [2021-02-19 18:51:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:51:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-02-19 18:51:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:52,879 INFO L225 Difference]: With dead ends: 7159 [2021-02-19 18:51:52,879 INFO L226 Difference]: Without dead ends: 7151 [2021-02-19 18:51:52,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:51:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-02-19 18:51:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3360. [2021-02-19 18:51:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-02-19 18:51:52,936 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-02-19 18:51:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:52,936 INFO L480 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-02-19 18:51:52,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-02-19 18:51:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-02-19 18:51:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:52,940 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:52,940 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:53,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 18:51:53,141 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1551801195, now seen corresponding path program 21 times [2021-02-19 18:51:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:53,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508805849] [2021-02-19 18:51:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508805849] [2021-02-19 18:51:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580471646] [2021-02-19 18:51:53,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:53,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:53,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:53,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:53,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 18:51:53,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849772714] [2021-02-19 18:51:53,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:53,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:53,250 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:53,416 INFO L93 Difference]: Finished difference Result 5123 states and 16923 transitions. [2021-02-19 18:51:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:51:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:53,422 INFO L225 Difference]: With dead ends: 5123 [2021-02-19 18:51:53,422 INFO L226 Difference]: Without dead ends: 5123 [2021-02-19 18:51:53,422 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-02-19 18:51:53,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4026. [2021-02-19 18:51:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.443726708074534) internal successors, (13861), 4025 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13861 transitions. [2021-02-19 18:51:53,472 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13861 transitions. Word has length 27 [2021-02-19 18:51:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:53,472 INFO L480 AbstractCegarLoop]: Abstraction has 4026 states and 13861 transitions. [2021-02-19 18:51:53,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13861 transitions. [2021-02-19 18:51:53,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:53,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:53,476 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:53,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:53,688 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1076634804, now seen corresponding path program 22 times [2021-02-19 18:51:53,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:53,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601771953] [2021-02-19 18:51:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:53,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601771953] [2021-02-19 18:51:53,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100038462] [2021-02-19 18:51:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:53,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:53,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:53,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:53,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874152199] [2021-02-19 18:51:53,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:53,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:53,844 INFO L87 Difference]: Start difference. First operand 4026 states and 13861 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:54,500 INFO L93 Difference]: Finished difference Result 7661 states and 24465 transitions. [2021-02-19 18:51:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:51:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:54,511 INFO L225 Difference]: With dead ends: 7661 [2021-02-19 18:51:54,511 INFO L226 Difference]: Without dead ends: 7661 [2021-02-19 18:51:54,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:51:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7661 states. [2021-02-19 18:51:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7661 to 4388. [2021-02-19 18:51:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 3.4410759060861635) internal successors, (15096), 4387 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 15096 transitions. [2021-02-19 18:51:54,591 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 15096 transitions. Word has length 27 [2021-02-19 18:51:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:54,591 INFO L480 AbstractCegarLoop]: Abstraction has 4388 states and 15096 transitions. [2021-02-19 18:51:54,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 15096 transitions. [2021-02-19 18:51:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:54,596 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:54,596 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:54,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 18:51:54,796 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1265853102, now seen corresponding path program 23 times [2021-02-19 18:51:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17361464] [2021-02-19 18:51:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:54,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17361464] [2021-02-19 18:51:54,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934846496] [2021-02-19 18:51:54,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:54,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:54,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:54,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:54,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:54,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:54,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460495586] [2021-02-19 18:51:54,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:54,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:54,906 INFO L87 Difference]: Start difference. First operand 4388 states and 15096 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:55,393 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2021-02-19 18:51:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:51:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:55,403 INFO L225 Difference]: With dead ends: 7294 [2021-02-19 18:51:55,403 INFO L226 Difference]: Without dead ends: 7286 [2021-02-19 18:51:55,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:51:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-02-19 18:51:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 4380. [2021-02-19 18:51:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.4405115323133137) internal successors, (15066), 4379 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 15066 transitions. [2021-02-19 18:51:55,504 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 15066 transitions. Word has length 27 [2021-02-19 18:51:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:55,504 INFO L480 AbstractCegarLoop]: Abstraction has 4380 states and 15066 transitions. [2021-02-19 18:51:55,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 15066 transitions. [2021-02-19 18:51:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:55,509 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:55,509 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:55,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 18:51:55,709 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1817475720, now seen corresponding path program 9 times [2021-02-19 18:51:55,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:55,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254941278] [2021-02-19 18:51:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:55,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254941278] [2021-02-19 18:51:55,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793261152] [2021-02-19 18:51:55,754 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 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 [2021-02-19 18:51:55,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:55,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:51:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:55,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:55,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-02-19 18:51:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109987855] [2021-02-19 18:51:55,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:55,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:55,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:55,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:55,839 INFO L87 Difference]: Start difference. First operand 4380 states and 15066 transitions. Second operand has 10 states, 10 states have (on average 3.7) 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) [2021-02-19 18:51:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:56,088 INFO L93 Difference]: Finished difference Result 5160 states and 17337 transitions. [2021-02-19 18:51:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:51:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) 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 27 [2021-02-19 18:51:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:56,095 INFO L225 Difference]: With dead ends: 5160 [2021-02-19 18:51:56,095 INFO L226 Difference]: Without dead ends: 5160 [2021-02-19 18:51:56,095 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:51:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-02-19 18:51:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4419. [2021-02-19 18:51:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 3.438886373924853) internal successors, (15193), 4418 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 15193 transitions. [2021-02-19 18:51:56,149 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 15193 transitions. Word has length 27 [2021-02-19 18:51:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:56,149 INFO L480 AbstractCegarLoop]: Abstraction has 4419 states and 15193 transitions. [2021-02-19 18:51:56,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) 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) [2021-02-19 18:51:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 15193 transitions. [2021-02-19 18:51:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:56,154 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:56,154 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:56,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:56,354 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:56,355 INFO L82 PathProgramCache]: Analyzing trace with hash -622470842, now seen corresponding path program 24 times [2021-02-19 18:51:56,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:56,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333138973] [2021-02-19 18:51:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:56,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333138973] [2021-02-19 18:51:56,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666418581] [2021-02-19 18:51:56,386 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 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 [2021-02-19 18:51:56,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:56,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:56,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:56,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:56,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314144750] [2021-02-19 18:51:56,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:56,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:56,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:56,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:56,463 INFO L87 Difference]: Start difference. First operand 4419 states and 15193 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:56,874 INFO L93 Difference]: Finished difference Result 7167 states and 23253 transitions. [2021-02-19 18:51:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:51:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:51:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:56,883 INFO L225 Difference]: With dead ends: 7167 [2021-02-19 18:51:56,883 INFO L226 Difference]: Without dead ends: 7135 [2021-02-19 18:51:56,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:51:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-02-19 18:51:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 4447. [2021-02-19 18:51:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.435672514619883) internal successors, (15275), 4446 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 15275 transitions. [2021-02-19 18:51:56,974 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 15275 transitions. Word has length 27 [2021-02-19 18:51:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:56,974 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 15275 transitions. [2021-02-19 18:51:56,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 15275 transitions. [2021-02-19 18:51:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:56,978 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:56,979 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:57,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-02-19 18:51:57,194 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:57,194 INFO L82 PathProgramCache]: Analyzing trace with hash -310114870, now seen corresponding path program 25 times [2021-02-19 18:51:57,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:57,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305815076] [2021-02-19 18:51:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305815076] [2021-02-19 18:51:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561955083] [2021-02-19 18:51:57,230 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 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 [2021-02-19 18:51:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:57,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:57,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:57,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628943914] [2021-02-19 18:51:57,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:57,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:57,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:57,357 INFO L87 Difference]: Start difference. First operand 4447 states and 15275 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:58,117 INFO L93 Difference]: Finished difference Result 7634 states and 24450 transitions. [2021-02-19 18:51:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:51:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:58,127 INFO L225 Difference]: With dead ends: 7634 [2021-02-19 18:51:58,127 INFO L226 Difference]: Without dead ends: 7634 [2021-02-19 18:51:58,127 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:51:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-02-19 18:51:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 4681. [2021-02-19 18:51:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 3.4264957264957263) internal successors, (16036), 4680 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 16036 transitions. [2021-02-19 18:51:58,211 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 16036 transitions. Word has length 27 [2021-02-19 18:51:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:58,211 INFO L480 AbstractCegarLoop]: Abstraction has 4681 states and 16036 transitions. [2021-02-19 18:51:58,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 16036 transitions. [2021-02-19 18:51:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:58,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:58,216 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:58,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:58,416 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:58,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1472534600, now seen corresponding path program 26 times [2021-02-19 18:51:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:58,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501569589] [2021-02-19 18:51:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501569589] [2021-02-19 18:51:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751674464] [2021-02-19 18:51:58,450 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 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 [2021-02-19 18:51:58,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:58,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158778426] [2021-02-19 18:51:58,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:58,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:58,550 INFO L87 Difference]: Start difference. First operand 4681 states and 16036 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:59,110 INFO L93 Difference]: Finished difference Result 7391 states and 23828 transitions. [2021-02-19 18:51:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:51:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:59,119 INFO L225 Difference]: With dead ends: 7391 [2021-02-19 18:51:59,119 INFO L226 Difference]: Without dead ends: 7383 [2021-02-19 18:51:59,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:51:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-02-19 18:51:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4675. [2021-02-19 18:51:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 3.4251176722293537) internal successors, (16009), 4674 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 16009 transitions. [2021-02-19 18:51:59,204 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 16009 transitions. Word has length 27 [2021-02-19 18:51:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 4675 states and 16009 transitions. [2021-02-19 18:51:59,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 16009 transitions. [2021-02-19 18:51:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:59,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:59,209 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:59,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 18:51:59,426 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash 627563148, now seen corresponding path program 27 times [2021-02-19 18:51:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173121652] [2021-02-19 18:51:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173121652] [2021-02-19 18:51:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623012877] [2021-02-19 18:51:59,460 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 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 [2021-02-19 18:51:59,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:51:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:59,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:59,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447603223] [2021-02-19 18:51:59,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:59,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:59,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:59,568 INFO L87 Difference]: Start difference. First operand 4675 states and 16009 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:52:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:00,083 INFO L93 Difference]: Finished difference Result 7057 states and 23013 transitions. [2021-02-19 18:52:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:52:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-02-19 18:52:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:00,093 INFO L225 Difference]: With dead ends: 7057 [2021-02-19 18:52:00,093 INFO L226 Difference]: Without dead ends: 7025 [2021-02-19 18:52:00,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:52:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-02-19 18:52:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4719. [2021-02-19 18:52:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.42030521407376) internal successors, (16137), 4718 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16137 transitions. [2021-02-19 18:52:00,202 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16137 transitions. Word has length 27 [2021-02-19 18:52:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:00,202 INFO L480 AbstractCegarLoop]: Abstraction has 4719 states and 16137 transitions. [2021-02-19 18:52:00,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:52:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16137 transitions. [2021-02-19 18:52:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:52:00,207 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:00,207 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:00,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-02-19 18:52:00,407 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:00,408 INFO L82 PathProgramCache]: Analyzing trace with hash 292159734, now seen corresponding path program 28 times [2021-02-19 18:52:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:00,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071220543] [2021-02-19 18:52:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:00,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071220543] [2021-02-19 18:52:00,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756400451] [2021-02-19 18:52:00,460 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 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 [2021-02-19 18:52:00,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:00,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:00,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:52:00,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:00,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:00,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:52:00,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806425174] [2021-02-19 18:52:00,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:52:00,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:52:00,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:52:00,585 INFO L87 Difference]: Start difference. First operand 4719 states and 16137 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:52:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:00,965 INFO L93 Difference]: Finished difference Result 6384 states and 21138 transitions. [2021-02-19 18:52:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:52:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-02-19 18:52:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:00,975 INFO L225 Difference]: With dead ends: 6384 [2021-02-19 18:52:00,975 INFO L226 Difference]: Without dead ends: 6384 [2021-02-19 18:52:00,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:52:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-02-19 18:52:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4849. [2021-02-19 18:52:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 3.4096534653465347) internal successors, (16530), 4848 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 16530 transitions. [2021-02-19 18:52:01,060 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 16530 transitions. Word has length 27 [2021-02-19 18:52:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:01,060 INFO L480 AbstractCegarLoop]: Abstraction has 4849 states and 16530 transitions. [2021-02-19 18:52:01,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:52:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 16530 transitions. [2021-02-19 18:52:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:52:01,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:01,067 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:01,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:01,289 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:01,289 INFO L82 PathProgramCache]: Analyzing trace with hash 345622433, now seen corresponding path program 15 times [2021-02-19 18:52:01,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:01,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771575067] [2021-02-19 18:52:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771575067] [2021-02-19 18:52:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999209000] [2021-02-19 18:52:01,325 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 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 [2021-02-19 18:52:01,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:52:01,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:52:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 18:52:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415586053] [2021-02-19 18:52:01,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:52:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:52:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:52:01,413 INFO L87 Difference]: Start difference. First operand 4849 states and 16530 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:52:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:01,768 INFO L93 Difference]: Finished difference Result 6692 states and 22004 transitions. [2021-02-19 18:52:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:52:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-02-19 18:52:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:01,778 INFO L225 Difference]: With dead ends: 6692 [2021-02-19 18:52:01,778 INFO L226 Difference]: Without dead ends: 6692 [2021-02-19 18:52:01,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:52:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2021-02-19 18:52:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 4967. [2021-02-19 18:52:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.3987112364075713) internal successors, (16878), 4966 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 16878 transitions. [2021-02-19 18:52:01,897 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 16878 transitions. Word has length 27 [2021-02-19 18:52:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:01,897 INFO L480 AbstractCegarLoop]: Abstraction has 4967 states and 16878 transitions. [2021-02-19 18:52:01,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:52:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 16878 transitions. [2021-02-19 18:52:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:52:01,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:01,903 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:02,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 18:52:02,104 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash 940224133, now seen corresponding path program 16 times [2021-02-19 18:52:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:02,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127374782] [2021-02-19 18:52:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127374782] [2021-02-19 18:52:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57163687] [2021-02-19 18:52:02,140 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 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 [2021-02-19 18:52:02,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:52:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:02,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:02,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 18:52:02,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263013769] [2021-02-19 18:52:02,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:52:02,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:52:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:52:02,222 INFO L87 Difference]: Start difference. First operand 4967 states and 16878 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:52:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:02,508 INFO L93 Difference]: Finished difference Result 6568 states and 21695 transitions. [2021-02-19 18:52:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:52:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-02-19 18:52:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:02,516 INFO L225 Difference]: With dead ends: 6568 [2021-02-19 18:52:02,516 INFO L226 Difference]: Without dead ends: 6552 [2021-02-19 18:52:02,517 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-02-19 18:52:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5075. [2021-02-19 18:52:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.3866771777690183) internal successors, (17184), 5074 states have internal predecessors, (17184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 17184 transitions. [2021-02-19 18:52:02,585 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 17184 transitions. Word has length 27 [2021-02-19 18:52:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:02,585 INFO L480 AbstractCegarLoop]: Abstraction has 5075 states and 17184 transitions. [2021-02-19 18:52:02,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:52:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 17184 transitions. [2021-02-19 18:52:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:52:02,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:02,590 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:02,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:02,791 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1654738534, now seen corresponding path program 10 times [2021-02-19 18:52:02,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:02,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126257055] [2021-02-19 18:52:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:02,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126257055] [2021-02-19 18:52:02,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443884303] [2021-02-19 18:52:02,826 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 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 [2021-02-19 18:52:02,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:02,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:52:02,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:02,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:02,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 18:52:02,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500734221] [2021-02-19 18:52:02,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:52:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:52:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:52:02,920 INFO L87 Difference]: Start difference. First operand 5075 states and 17184 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:03,228 INFO L93 Difference]: Finished difference Result 5593 states and 18688 transitions. [2021-02-19 18:52:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:52:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:52:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:03,238 INFO L225 Difference]: With dead ends: 5593 [2021-02-19 18:52:03,239 INFO L226 Difference]: Without dead ends: 5593 [2021-02-19 18:52:03,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:52:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-02-19 18:52:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4995. [2021-02-19 18:52:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 3.383660392470965) internal successors, (16898), 4994 states have internal predecessors, (16898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 16898 transitions. [2021-02-19 18:52:03,306 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 16898 transitions. Word has length 27 [2021-02-19 18:52:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:03,306 INFO L480 AbstractCegarLoop]: Abstraction has 4995 states and 16898 transitions. [2021-02-19 18:52:03,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 16898 transitions. [2021-02-19 18:52:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:03,311 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:03,311 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:03,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 18:52:03,512 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1329058272, now seen corresponding path program 29 times [2021-02-19 18:52:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:03,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184480711] [2021-02-19 18:52:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:03,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184480711] [2021-02-19 18:52:03,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014953721] [2021-02-19 18:52:03,660 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 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 [2021-02-19 18:52:03,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:52:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:03,798 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 19 treesize of output 11 [2021-02-19 18:52:03,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:03,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:03,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:03,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-02-19 18:52:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:03,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:03,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 18:52:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941109390] [2021-02-19 18:52:03,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:52:03,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:03,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:52:03,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:52:03,870 INFO L87 Difference]: Start difference. First operand 4995 states and 16898 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-02-19 18:52:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:04,094 INFO L93 Difference]: Finished difference Result 5811 states and 19365 transitions. [2021-02-19 18:52:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:52:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 [2021-02-19 18:52:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:04,102 INFO L225 Difference]: With dead ends: 5811 [2021-02-19 18:52:04,102 INFO L226 Difference]: Without dead ends: 5742 [2021-02-19 18:52:04,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:52:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-02-19 18:52:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5187. [2021-02-19 18:52:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.3814114924797534) internal successors, (17536), 5186 states have internal predecessors, (17536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 17536 transitions. [2021-02-19 18:52:04,164 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 17536 transitions. Word has length 30 [2021-02-19 18:52:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:04,165 INFO L480 AbstractCegarLoop]: Abstraction has 5187 states and 17536 transitions. [2021-02-19 18:52:04,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-02-19 18:52:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 17536 transitions. [2021-02-19 18:52:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:04,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:04,170 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:04,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:52:04,370 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:04,371 INFO L82 PathProgramCache]: Analyzing trace with hash -984189867, now seen corresponding path program 11 times [2021-02-19 18:52:04,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:04,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376394665] [2021-02-19 18:52:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:04,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376394665] [2021-02-19 18:52:04,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450058242] [2021-02-19 18:52:04,754 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 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 [2021-02-19 18:52:04,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:04,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:04,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:52:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:05,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:05,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:52:05,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:05,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:05,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-02-19 18:52:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:05,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:05,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-02-19 18:52:05,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182576415] [2021-02-19 18:52:05,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:52:05,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:52:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:52:05,121 INFO L87 Difference]: Start difference. First operand 5187 states and 17536 transitions. Second operand has 25 states, 25 states have (on average 2.12) 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) [2021-02-19 18:52:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:08,575 INFO L93 Difference]: Finished difference Result 7931 states and 26087 transitions. [2021-02-19 18:52:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:52:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) 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 [2021-02-19 18:52:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:08,587 INFO L225 Difference]: With dead ends: 7931 [2021-02-19 18:52:08,587 INFO L226 Difference]: Without dead ends: 7905 [2021-02-19 18:52:08,587 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=399, Invalid=3633, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:52:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2021-02-19 18:52:08,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 5270. [2021-02-19 18:52:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 5269 states have (on average 3.378060353008161) internal successors, (17799), 5269 states have internal predecessors, (17799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 17799 transitions. [2021-02-19 18:52:08,676 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 17799 transitions. Word has length 30 [2021-02-19 18:52:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:08,677 INFO L480 AbstractCegarLoop]: Abstraction has 5270 states and 17799 transitions. [2021-02-19 18:52:08,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) 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) [2021-02-19 18:52:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 17799 transitions. [2021-02-19 18:52:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:08,683 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:08,683 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:08,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:08,886 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:08,886 INFO L82 PathProgramCache]: Analyzing trace with hash 162907721, now seen corresponding path program 12 times [2021-02-19 18:52:08,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:08,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578621281] [2021-02-19 18:52:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:09,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578621281] [2021-02-19 18:52:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607529340] [2021-02-19 18:52:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:52:09,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:09,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:09,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:52:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:09,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:09,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:52:09,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:52:09,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:09,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:09,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-02-19 18:52:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:09,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:09,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-02-19 18:52:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64673126] [2021-02-19 18:52:09,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:52:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:52:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:09,750 INFO L87 Difference]: Start difference. First operand 5270 states and 17799 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:52:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:14,952 INFO L93 Difference]: Finished difference Result 8061 states and 25373 transitions. [2021-02-19 18:52:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:52:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 [2021-02-19 18:52:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:14,964 INFO L225 Difference]: With dead ends: 8061 [2021-02-19 18:52:14,964 INFO L226 Difference]: Without dead ends: 7981 [2021-02-19 18:52:14,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=681, Invalid=6291, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:52:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7981 states. [2021-02-19 18:52:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7981 to 5290. [2021-02-19 18:52:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5290 states, 5289 states have (on average 3.380223104556627) internal successors, (17878), 5289 states have internal predecessors, (17878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5290 states to 5290 states and 17878 transitions. [2021-02-19 18:52:15,050 INFO L78 Accepts]: Start accepts. Automaton has 5290 states and 17878 transitions. Word has length 30 [2021-02-19 18:52:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:15,050 INFO L480 AbstractCegarLoop]: Abstraction has 5290 states and 17878 transitions. [2021-02-19 18:52:15,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:52:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5290 states and 17878 transitions. [2021-02-19 18:52:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:15,056 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:15,056 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:15,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:15,257 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1843404361, now seen corresponding path program 13 times [2021-02-19 18:52:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:15,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662353380] [2021-02-19 18:52:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:15,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662353380] [2021-02-19 18:52:15,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829061193] [2021-02-19 18:52:15,551 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 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 [2021-02-19 18:52:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:15,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:15,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:15,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:52:15,754 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:52:15,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:52:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:15,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:15,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:52:15,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837824454] [2021-02-19 18:52:15,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:52:15,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:52:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:52:15,844 INFO L87 Difference]: Start difference. First operand 5290 states and 17878 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:52:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:19,396 INFO L93 Difference]: Finished difference Result 7087 states and 22903 transitions. [2021-02-19 18:52:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:52:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-02-19 18:52:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:19,406 INFO L225 Difference]: With dead ends: 7087 [2021-02-19 18:52:19,406 INFO L226 Difference]: Without dead ends: 7041 [2021-02-19 18:52:19,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=547, Invalid=4009, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:52:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7041 states. [2021-02-19 18:52:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7041 to 5338. [2021-02-19 18:52:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.382049840734495) internal successors, (18050), 5337 states have internal predecessors, (18050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18050 transitions. [2021-02-19 18:52:19,481 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18050 transitions. Word has length 30 [2021-02-19 18:52:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:19,481 INFO L480 AbstractCegarLoop]: Abstraction has 5338 states and 18050 transitions. [2021-02-19 18:52:19,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:52:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18050 transitions. [2021-02-19 18:52:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:19,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:19,487 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:19,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 18:52:19,687 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:19,688 INFO L82 PathProgramCache]: Analyzing trace with hash -64238624, now seen corresponding path program 17 times [2021-02-19 18:52:19,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:19,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480624335] [2021-02-19 18:52:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:20,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480624335] [2021-02-19 18:52:20,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304627587] [2021-02-19 18:52:20,251 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 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 [2021-02-19 18:52:20,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:52:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 18:52:20,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:20,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:20,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:20,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-02-19 18:52:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:20,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:20,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-02-19 18:52:20,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981412805] [2021-02-19 18:52:20,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:52:20,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:52:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:52:20,654 INFO L87 Difference]: Start difference. First operand 5338 states and 18050 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) [2021-02-19 18:52:21,881 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-02-19 18:52:23,155 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-19 18:52:24,060 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 18:52:24,413 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 18:52:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:25,039 INFO L93 Difference]: Finished difference Result 7096 states and 23315 transitions. [2021-02-19 18:52:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 18:52:25,040 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 30 [2021-02-19 18:52:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:25,049 INFO L225 Difference]: With dead ends: 7096 [2021-02-19 18:52:25,049 INFO L226 Difference]: Without dead ends: 7070 [2021-02-19 18:52:25,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=537, Invalid=4293, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:52:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-02-19 18:52:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5425. [2021-02-19 18:52:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 3.3742625368731565) internal successors, (18302), 5424 states have internal predecessors, (18302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 18302 transitions. [2021-02-19 18:52:25,121 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 18302 transitions. Word has length 30 [2021-02-19 18:52:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:25,121 INFO L480 AbstractCegarLoop]: Abstraction has 5425 states and 18302 transitions. [2021-02-19 18:52:25,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 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) [2021-02-19 18:52:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 18302 transitions. [2021-02-19 18:52:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:25,127 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:25,127 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:25,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:25,327 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash -415527185, now seen corresponding path program 14 times [2021-02-19 18:52:25,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:25,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586809835] [2021-02-19 18:52:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:25,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586809835] [2021-02-19 18:52:25,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555519473] [2021-02-19 18:52:25,669 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 [2021-02-19 18:52:25,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:52:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:25,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:25,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:52:25,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:25,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:25,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:25,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-02-19 18:52:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:26,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:26,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-02-19 18:52:26,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829215708] [2021-02-19 18:52:26,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:52:26,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:52:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:52:26,018 INFO L87 Difference]: Start difference. First operand 5425 states and 18302 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-02-19 18:52:26,804 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:52:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:27,804 INFO L93 Difference]: Finished difference Result 6659 states and 21647 transitions. [2021-02-19 18:52:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:52:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 30 [2021-02-19 18:52:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:27,814 INFO L225 Difference]: With dead ends: 6659 [2021-02-19 18:52:27,814 INFO L226 Difference]: Without dead ends: 6629 [2021-02-19 18:52:27,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=329, Invalid=2023, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:52:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6629 states. [2021-02-19 18:52:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6629 to 5428. [2021-02-19 18:52:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3744241754192004) internal successors, (18313), 5427 states have internal predecessors, (18313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18313 transitions. [2021-02-19 18:52:27,890 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18313 transitions. Word has length 30 [2021-02-19 18:52:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:27,890 INFO L480 AbstractCegarLoop]: Abstraction has 5428 states and 18313 transitions. [2021-02-19 18:52:27,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-02-19 18:52:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18313 transitions. [2021-02-19 18:52:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:27,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:27,896 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:28,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:28,098 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash 124659579, now seen corresponding path program 15 times [2021-02-19 18:52:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:28,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107722759] [2021-02-19 18:52:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:28,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107722759] [2021-02-19 18:52:28,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522319842] [2021-02-19 18:52:28,471 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 [2021-02-19 18:52:28,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:52:28,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:28,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:52:28,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:28,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:52:28,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:28,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:28,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:28,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:10 [2021-02-19 18:52:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:28,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:28,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-02-19 18:52:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592500013] [2021-02-19 18:52:28,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:52:28,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:52:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:28,840 INFO L87 Difference]: Start difference. First operand 5428 states and 18313 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-02-19 18:52:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:31,632 INFO L93 Difference]: Finished difference Result 6867 states and 22160 transitions. [2021-02-19 18:52:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:52:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 [2021-02-19 18:52:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:31,642 INFO L225 Difference]: With dead ends: 6867 [2021-02-19 18:52:31,642 INFO L226 Difference]: Without dead ends: 6837 [2021-02-19 18:52:31,642 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=495, Invalid=3045, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:52:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2021-02-19 18:52:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 5431. [2021-02-19 18:52:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 3.374585635359116) internal successors, (18324), 5430 states have internal predecessors, (18324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 18324 transitions. [2021-02-19 18:52:31,716 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 18324 transitions. Word has length 30 [2021-02-19 18:52:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:31,716 INFO L480 AbstractCegarLoop]: Abstraction has 5431 states and 18324 transitions. [2021-02-19 18:52:31,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-02-19 18:52:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 18324 transitions. [2021-02-19 18:52:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:31,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:31,722 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:31,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-02-19 18:52:31,922 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1260881657, now seen corresponding path program 16 times [2021-02-19 18:52:31,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:31,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323638205] [2021-02-19 18:52:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323638205] [2021-02-19 18:52:32,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955603173] [2021-02-19 18:52:32,262 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 [2021-02-19 18:52:32,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:32,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:32,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:32,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-02-19 18:52:32,551 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:52:32,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:32,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:32,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-02-19 18:52:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:32,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:32,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 18:52:32,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037368172] [2021-02-19 18:52:32,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:52:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:52:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:32,616 INFO L87 Difference]: Start difference. First operand 5431 states and 18324 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-02-19 18:52:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:38,150 INFO L93 Difference]: Finished difference Result 10713 states and 34223 transitions. [2021-02-19 18:52:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-02-19 18:52:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 [2021-02-19 18:52:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:38,164 INFO L225 Difference]: With dead ends: 10713 [2021-02-19 18:52:38,164 INFO L226 Difference]: Without dead ends: 10664 [2021-02-19 18:52:38,165 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=850, Invalid=9656, Unknown=0, NotChecked=0, Total=10506 [2021-02-19 18:52:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10664 states. [2021-02-19 18:52:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10664 to 5462. [2021-02-19 18:52:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5462 states, 5461 states have (on average 3.3761215894524814) internal successors, (18437), 5461 states have internal predecessors, (18437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5462 states to 5462 states and 18437 transitions. [2021-02-19 18:52:38,269 INFO L78 Accepts]: Start accepts. Automaton has 5462 states and 18437 transitions. Word has length 30 [2021-02-19 18:52:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:38,269 INFO L480 AbstractCegarLoop]: Abstraction has 5462 states and 18437 transitions. [2021-02-19 18:52:38,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-02-19 18:52:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5462 states and 18437 transitions. [2021-02-19 18:52:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:38,275 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:38,275 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:38,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:38,476 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1754432119, now seen corresponding path program 17 times [2021-02-19 18:52:38,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:38,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156460602] [2021-02-19 18:52:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:38,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156460602] [2021-02-19 18:52:38,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950105097] [2021-02-19 18:52:38,763 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 [2021-02-19 18:52:38,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:38,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:38,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:38,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:52:38,953 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:52:38,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:38,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:38,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:52:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:39,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:39,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:52:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862472099] [2021-02-19 18:52:39,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:52:39,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:52:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:52:39,046 INFO L87 Difference]: Start difference. First operand 5462 states and 18437 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:52:40,035 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 18:52:41,208 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 18:52:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:42,802 INFO L93 Difference]: Finished difference Result 7204 states and 23296 transitions. [2021-02-19 18:52:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:52:42,803 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-02-19 18:52:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:42,814 INFO L225 Difference]: With dead ends: 7204 [2021-02-19 18:52:42,814 INFO L226 Difference]: Without dead ends: 7158 [2021-02-19 18:52:42,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=546, Invalid=4146, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:52:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7158 states. [2021-02-19 18:52:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7158 to 5446. [2021-02-19 18:52:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 3.37722681359045) internal successors, (18389), 5445 states have internal predecessors, (18389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 18389 transitions. [2021-02-19 18:52:42,933 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 18389 transitions. Word has length 30 [2021-02-19 18:52:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:42,933 INFO L480 AbstractCegarLoop]: Abstraction has 5446 states and 18389 transitions. [2021-02-19 18:52:42,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:52:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 18389 transitions. [2021-02-19 18:52:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:42,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:42,939 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:43,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:43,139 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:43,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2103274249, now seen corresponding path program 18 times [2021-02-19 18:52:43,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:43,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971103806] [2021-02-19 18:52:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:43,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971103806] [2021-02-19 18:52:43,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568046767] [2021-02-19 18:52:43,489 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 [2021-02-19 18:52:43,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:52:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:43,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:52:43,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:52:43,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:43,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:43,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:40 [2021-02-19 18:52:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:43,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:43,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-02-19 18:52:43,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673809376] [2021-02-19 18:52:43,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:52:43,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:52:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:43,863 INFO L87 Difference]: Start difference. First operand 5446 states and 18389 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:52:45,839 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-02-19 18:52:46,662 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-02-19 18:52:47,029 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-02-19 18:52:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:49,667 INFO L93 Difference]: Finished difference Result 8672 states and 27951 transitions. [2021-02-19 18:52:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-02-19 18:52:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 [2021-02-19 18:52:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:49,679 INFO L225 Difference]: With dead ends: 8672 [2021-02-19 18:52:49,680 INFO L226 Difference]: Without dead ends: 8631 [2021-02-19 18:52:49,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=807, Invalid=6849, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 18:52:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-02-19 18:52:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5517. [2021-02-19 18:52:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 3.383067440174039) internal successors, (18661), 5516 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 18661 transitions. [2021-02-19 18:52:49,776 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 18661 transitions. Word has length 30 [2021-02-19 18:52:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:49,776 INFO L480 AbstractCegarLoop]: Abstraction has 5517 states and 18661 transitions. [2021-02-19 18:52:49,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:52:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 18661 transitions. [2021-02-19 18:52:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:49,782 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:49,782 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:49,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 18:52:49,982 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 10368177, now seen corresponding path program 19 times [2021-02-19 18:52:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:49,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872037016] [2021-02-19 18:52:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:50,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872037016] [2021-02-19 18:52:50,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645440044] [2021-02-19 18:52:50,336 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 [2021-02-19 18:52:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:52:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:50,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:50,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:52:50,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:50,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:50,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 18:52:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:50,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:50,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-02-19 18:52:50,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888001073] [2021-02-19 18:52:50,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:52:50,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:52:50,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:50,665 INFO L87 Difference]: Start difference. First operand 5517 states and 18661 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-02-19 18:52:51,399 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:52:52,056 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 18:52:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:53,961 INFO L93 Difference]: Finished difference Result 8133 states and 26477 transitions. [2021-02-19 18:52:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 18:52:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 [2021-02-19 18:52:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:53,973 INFO L225 Difference]: With dead ends: 8133 [2021-02-19 18:52:53,974 INFO L226 Difference]: Without dead ends: 8118 [2021-02-19 18:52:53,974 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=633, Invalid=3657, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:52:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8118 states. [2021-02-19 18:52:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8118 to 5529. [2021-02-19 18:52:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5529 states, 5528 states have (on average 3.3851302460202604) internal successors, (18713), 5528 states have internal predecessors, (18713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5529 states to 5529 states and 18713 transitions. [2021-02-19 18:52:54,086 INFO L78 Accepts]: Start accepts. Automaton has 5529 states and 18713 transitions. Word has length 30 [2021-02-19 18:52:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:54,086 INFO L480 AbstractCegarLoop]: Abstraction has 5529 states and 18713 transitions. [2021-02-19 18:52:54,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-02-19 18:52:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 5529 states and 18713 transitions. [2021-02-19 18:52:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:54,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:54,092 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:54,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:54,293 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1357205118, now seen corresponding path program 18 times [2021-02-19 18:52:54,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:54,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688279157] [2021-02-19 18:52:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:54,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688279157] [2021-02-19 18:52:54,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118625726] [2021-02-19 18:52:54,922 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 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 [2021-02-19 18:52:54,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 18:52:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:55,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:55,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:55,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:52:55,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:52:55,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:55,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:55,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:44 [2021-02-19 18:52:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:55,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:55,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-02-19 18:52:55,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196984774] [2021-02-19 18:52:55,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:52:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:52:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:52:55,488 INFO L87 Difference]: Start difference. First operand 5529 states and 18713 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) [2021-02-19 18:52:55,961 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-02-19 18:52:56,388 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:52:56,520 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-19 18:52:56,774 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-02-19 18:52:57,230 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-02-19 18:52:57,465 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 18:52:58,136 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-02-19 18:52:58,397 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-02-19 18:52:58,796 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 18:52:58,948 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 18:52:59,410 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-02-19 18:52:59,717 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-02-19 18:52:59,973 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-02-19 18:53:00,208 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-02-19 18:53:00,771 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-02-19 18:53:01,118 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-02-19 18:53:01,515 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 18:53:01,743 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-02-19 18:53:02,177 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-02-19 18:53:02,404 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 18:53:02,627 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-02-19 18:53:02,907 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-02-19 18:53:03,162 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-02-19 18:53:03,342 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 18:53:03,531 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 18:53:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:05,327 INFO L93 Difference]: Finished difference Result 8323 states and 26935 transitions. [2021-02-19 18:53:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-02-19 18:53:05,328 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 30 [2021-02-19 18:53:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:05,340 INFO L225 Difference]: With dead ends: 8323 [2021-02-19 18:53:05,340 INFO L226 Difference]: Without dead ends: 8286 [2021-02-19 18:53:05,341 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4604 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1590, Invalid=12216, Unknown=0, NotChecked=0, Total=13806 [2021-02-19 18:53:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2021-02-19 18:53:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 5563. [2021-02-19 18:53:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5563 states, 5562 states have (on average 3.3858324343761237) internal successors, (18832), 5562 states have internal predecessors, (18832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5563 states to 5563 states and 18832 transitions. [2021-02-19 18:53:05,466 INFO L78 Accepts]: Start accepts. Automaton has 5563 states and 18832 transitions. Word has length 30 [2021-02-19 18:53:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:05,466 INFO L480 AbstractCegarLoop]: Abstraction has 5563 states and 18832 transitions. [2021-02-19 18:53:05,466 INFO L481 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) [2021-02-19 18:53:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5563 states and 18832 transitions. [2021-02-19 18:53:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:05,472 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:05,473 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:05,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-02-19 18:53:05,678 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash -868684430, now seen corresponding path program 19 times [2021-02-19 18:53:05,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:05,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286025354] [2021-02-19 18:53:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:06,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286025354] [2021-02-19 18:53:06,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051686619] [2021-02-19 18:53:06,106 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 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 [2021-02-19 18:53:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:06,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:06,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:06,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 18:53:06,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:06,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:06,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:06,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-02-19 18:53:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:06,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:06,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-02-19 18:53:06,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737469616] [2021-02-19 18:53:06,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:53:06,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:06,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:53:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:53:06,408 INFO L87 Difference]: Start difference. First operand 5563 states and 18832 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-02-19 18:53:06,941 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 18:53:09,326 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-02-19 18:53:09,514 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:53:09,655 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-19 18:53:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:11,109 INFO L93 Difference]: Finished difference Result 10482 states and 33844 transitions. [2021-02-19 18:53:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:53:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 30 [2021-02-19 18:53:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:11,125 INFO L225 Difference]: With dead ends: 10482 [2021-02-19 18:53:11,125 INFO L226 Difference]: Without dead ends: 10452 [2021-02-19 18:53:11,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=899, Invalid=5421, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:53:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10452 states. [2021-02-19 18:53:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10452 to 5642. [2021-02-19 18:53:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5642 states, 5641 states have (on average 3.3933699698634996) internal successors, (19142), 5641 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 19142 transitions. [2021-02-19 18:53:11,265 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 19142 transitions. Word has length 30 [2021-02-19 18:53:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:11,265 INFO L480 AbstractCegarLoop]: Abstraction has 5642 states and 19142 transitions. [2021-02-19 18:53:11,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-02-19 18:53:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 19142 transitions. [2021-02-19 18:53:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:11,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:11,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:11,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 18:53:11,473 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1683225747, now seen corresponding path program 20 times [2021-02-19 18:53:11,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:11,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802340403] [2021-02-19 18:53:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:11,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802340403] [2021-02-19 18:53:11,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656875320] [2021-02-19 18:53:11,897 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 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 [2021-02-19 18:53:11,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:11,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:53:11,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:12,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:53:12,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:53:12,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:12,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:12,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:40 [2021-02-19 18:53:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:12,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:12,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-02-19 18:53:12,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589845614] [2021-02-19 18:53:12,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:12,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:12,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:12,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:12,295 INFO L87 Difference]: Start difference. First operand 5642 states and 19142 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2021-02-19 18:53:13,140 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:53:13,751 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:53:14,661 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 18:53:14,803 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-02-19 18:53:15,043 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-02-19 18:53:15,176 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 18:53:15,557 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-02-19 18:53:16,468 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-02-19 18:53:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:19,414 INFO L93 Difference]: Finished difference Result 9668 states and 31300 transitions. [2021-02-19 18:53:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-02-19 18:53:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 [2021-02-19 18:53:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:19,430 INFO L225 Difference]: With dead ends: 9668 [2021-02-19 18:53:19,431 INFO L226 Difference]: Without dead ends: 9610 [2021-02-19 18:53:19,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3314 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1257, Invalid=8249, Unknown=0, NotChecked=0, Total=9506 [2021-02-19 18:53:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2021-02-19 18:53:19,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 5626. [2021-02-19 18:53:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 3.3909333333333334) internal successors, (19074), 5625 states have internal predecessors, (19074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 19074 transitions. [2021-02-19 18:53:19,534 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 19074 transitions. Word has length 30 [2021-02-19 18:53:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:19,534 INFO L480 AbstractCegarLoop]: Abstraction has 5626 states and 19074 transitions. [2021-02-19 18:53:19,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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) [2021-02-19 18:53:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 19074 transitions. [2021-02-19 18:53:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:19,540 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:19,540 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:19,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 18:53:19,741 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 488146577, now seen corresponding path program 21 times [2021-02-19 18:53:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:19,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348992469] [2021-02-19 18:53:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:20,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348992469] [2021-02-19 18:53:20,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085204473] [2021-02-19 18:53:20,100 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 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 [2021-02-19 18:53:20,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:53:20,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:20,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:20,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:53:20,279 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:53:20,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:20,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:20,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:53:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:20,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:20,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:53:20,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227441036] [2021-02-19 18:53:20,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:53:20,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:53:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:53:20,365 INFO L87 Difference]: Start difference. First operand 5626 states and 19074 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-02-19 18:53:21,235 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-19 18:53:21,594 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 18:53:21,825 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:53:23,893 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:53:24,452 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-02-19 18:53:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:26,593 INFO L93 Difference]: Finished difference Result 10506 states and 34166 transitions. [2021-02-19 18:53:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 18:53:26,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 [2021-02-19 18:53:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:26,609 INFO L225 Difference]: With dead ends: 10506 [2021-02-19 18:53:26,609 INFO L226 Difference]: Without dead ends: 10481 [2021-02-19 18:53:26,610 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1036, Invalid=6796, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 18:53:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10481 states. [2021-02-19 18:53:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10481 to 5604. [2021-02-19 18:53:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5603 states have (on average 3.3862216669641265) internal successors, (18973), 5603 states have internal predecessors, (18973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 18973 transitions. [2021-02-19 18:53:26,716 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 18973 transitions. Word has length 30 [2021-02-19 18:53:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:26,717 INFO L480 AbstractCegarLoop]: Abstraction has 5604 states and 18973 transitions. [2021-02-19 18:53:26,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-02-19 18:53:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 18973 transitions. [2021-02-19 18:53:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:26,723 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:26,723 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:26,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:26,923 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:26,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1152056156, now seen corresponding path program 20 times [2021-02-19 18:53:26,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:26,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829243456] [2021-02-19 18:53:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:27,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829243456] [2021-02-19 18:53:27,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598382463] [2021-02-19 18:53:27,321 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 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 [2021-02-19 18:53:27,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:27,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:27,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:27,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:27,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 79 [2021-02-19 18:53:28,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 13 xjuncts. [2021-02-19 18:53:29,305 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 287 DAG size of output: 91 [2021-02-19 18:53:29,309 INFO L628 ElimStorePlain]: treesize reduction 4667, result has 6.0 percent of original size [2021-02-19 18:53:29,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:29,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:947 [2021-02-19 18:53:30,061 WARN L202 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2021-02-19 18:53:30,506 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2021-02-19 18:53:30,725 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-19 18:53:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:30,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:30,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-02-19 18:53:30,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796001368] [2021-02-19 18:53:30,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:53:30,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:30,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:53:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:53:30,783 INFO L87 Difference]: Start difference. First operand 5604 states and 18973 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) [2021-02-19 18:53:31,028 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-02-19 18:53:31,181 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-19 18:53:31,476 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 43 [2021-02-19 18:53:31,834 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 18:53:32,103 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-02-19 18:53:32,301 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 18:53:32,464 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-02-19 18:53:32,795 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-02-19 18:53:33,604 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-02-19 18:53:35,125 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 18:53:35,326 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 18:53:35,494 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-19 18:53:36,405 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 18:53:36,622 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-02-19 18:53:37,467 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 18:53:38,400 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-02-19 18:53:38,786 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-02-19 18:53:39,048 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2021-02-19 18:53:39,418 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2021-02-19 18:53:39,586 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2021-02-19 18:53:39,854 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-02-19 18:53:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:39,911 INFO L93 Difference]: Finished difference Result 9147 states and 30110 transitions. [2021-02-19 18:53:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:53:39,912 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 30 [2021-02-19 18:53:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:39,928 INFO L225 Difference]: With dead ends: 9147 [2021-02-19 18:53:39,928 INFO L226 Difference]: Without dead ends: 9117 [2021-02-19 18:53:39,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1062, Invalid=6420, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 18:53:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2021-02-19 18:53:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 5604. [2021-02-19 18:53:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5603 states have (on average 3.3862216669641265) internal successors, (18973), 5603 states have internal predecessors, (18973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 18973 transitions. [2021-02-19 18:53:40,023 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 18973 transitions. Word has length 30 [2021-02-19 18:53:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:40,023 INFO L480 AbstractCegarLoop]: Abstraction has 5604 states and 18973 transitions. [2021-02-19 18:53:40,023 INFO L481 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) [2021-02-19 18:53:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 18973 transitions. [2021-02-19 18:53:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:40,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:40,030 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:40,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 18:53:40,230 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash 621051680, now seen corresponding path program 21 times [2021-02-19 18:53:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:40,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785124502] [2021-02-19 18:53:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:40,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785124502] [2021-02-19 18:53:40,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924150859] [2021-02-19 18:53:40,701 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 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 [2021-02-19 18:53:40,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:53:40,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:40,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:40,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:41,050 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-02-19 18:53:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 88 [2021-02-19 18:53:41,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:41,092 INFO L628 ElimStorePlain]: treesize reduction 62, result has 22.5 percent of original size [2021-02-19 18:53:41,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:41,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:18 [2021-02-19 18:53:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:41,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:41,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-02-19 18:53:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887417668] [2021-02-19 18:53:41,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:53:41,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:41,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:53:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:53:41,294 INFO L87 Difference]: Start difference. First operand 5604 states and 18973 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:41,480 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-02-19 18:53:42,006 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-02-19 18:53:42,172 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-19 18:53:42,356 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:53:43,201 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-02-19 18:53:43,930 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-02-19 18:53:44,512 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-02-19 18:53:44,670 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-02-19 18:53:44,891 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 18:53:45,220 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-02-19 18:53:46,055 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 18:53:46,268 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 18:53:46,783 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-02-19 18:53:47,305 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 18:53:47,620 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-02-19 18:53:47,961 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-02-19 18:53:48,339 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 18:53:48,558 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-02-19 18:53:48,749 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-02-19 18:53:48,989 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 18:53:49,282 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-02-19 18:53:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:49,290 INFO L93 Difference]: Finished difference Result 9443 states and 31054 transitions. [2021-02-19 18:53:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:53:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:53:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:49,304 INFO L225 Difference]: With dead ends: 9443 [2021-02-19 18:53:49,304 INFO L226 Difference]: Without dead ends: 9428 [2021-02-19 18:53:49,304 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1134, Invalid=6176, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 18:53:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9428 states. [2021-02-19 18:53:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9428 to 5610. [2021-02-19 18:53:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5610 states, 5609 states have (on average 3.3877696559101445) internal successors, (19002), 5609 states have internal predecessors, (19002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 19002 transitions. [2021-02-19 18:53:49,389 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 19002 transitions. Word has length 30 [2021-02-19 18:53:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:49,390 INFO L480 AbstractCegarLoop]: Abstraction has 5610 states and 19002 transitions. [2021-02-19 18:53:49,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 19002 transitions. [2021-02-19 18:53:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:49,396 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:49,396 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:49,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:49,596 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1296066140, now seen corresponding path program 22 times [2021-02-19 18:53:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:49,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036624546] [2021-02-19 18:53:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:49,793 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:53:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:50,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036624546] [2021-02-19 18:53:50,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951128213] [2021-02-19 18:53:50,380 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 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 [2021-02-19 18:53:50,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:50,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:50,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-02-19 18:53:50,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:53:50,689 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-02-19 18:53:50,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:50,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-02-19 18:53:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:50,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:50,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-02-19 18:53:50,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352705280] [2021-02-19 18:53:50,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:50,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:50,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:50,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:50,767 INFO L87 Difference]: Start difference. First operand 5610 states and 19002 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-02-19 18:53:51,155 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 18:53:51,570 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-19 18:53:51,797 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:53:52,036 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:53:52,185 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-02-19 18:53:52,495 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 18:53:52,768 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-02-19 18:53:52,906 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-02-19 18:53:53,350 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-02-19 18:53:53,568 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-02-19 18:53:53,988 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-02-19 18:53:54,337 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-02-19 18:53:54,726 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:53:54,917 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-02-19 18:53:55,105 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-19 18:53:55,357 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-02-19 18:53:55,650 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 18:53:55,789 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-19 18:53:56,049 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-02-19 18:53:56,179 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:53:56,460 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-02-19 18:53:56,733 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-02-19 18:53:56,973 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 18:53:57,256 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 18:53:57,400 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 18:53:57,710 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-02-19 18:53:58,111 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:53:58,271 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-02-19 18:53:58,590 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 18:53:58,784 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-02-19 18:53:59,005 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-02-19 18:53:59,277 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-02-19 18:53:59,576 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-02-19 18:53:59,952 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-02-19 18:54:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:00,363 INFO L93 Difference]: Finished difference Result 9229 states and 29949 transitions. [2021-02-19 18:54:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:54:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 [2021-02-19 18:54:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:00,378 INFO L225 Difference]: With dead ends: 9229 [2021-02-19 18:54:00,379 INFO L226 Difference]: Without dead ends: 9203 [2021-02-19 18:54:00,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1668, Invalid=6888, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 18:54:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9203 states. [2021-02-19 18:54:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9203 to 5609. [2021-02-19 18:54:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5608 states have (on average 3.388373751783167) internal successors, (19002), 5608 states have internal predecessors, (19002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 19002 transitions. [2021-02-19 18:54:00,466 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 19002 transitions. Word has length 30 [2021-02-19 18:54:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:00,467 INFO L480 AbstractCegarLoop]: Abstraction has 5609 states and 19002 transitions. [2021-02-19 18:54:00,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-02-19 18:54:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 19002 transitions. [2021-02-19 18:54:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:00,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:00,473 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:00,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:00,674 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1679712912, now seen corresponding path program 23 times [2021-02-19 18:54:00,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:00,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389955836] [2021-02-19 18:54:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:00,873 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:54:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389955836] [2021-02-19 18:54:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258843654] [2021-02-19 18:54:01,508 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 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 [2021-02-19 18:54:01,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:54:01,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:01,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:01,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:01,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-02-19 18:54:01,918 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:54:01,938 INFO L628 ElimStorePlain]: treesize reduction 13, result has 53.6 percent of original size [2021-02-19 18:54:01,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:01,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-02-19 18:54:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:02,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:02,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-02-19 18:54:02,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310189332] [2021-02-19 18:54:02,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:54:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:54:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:54:02,082 INFO L87 Difference]: Start difference. First operand 5609 states and 19002 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) 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) [2021-02-19 18:54:02,527 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 18:54:03,341 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-02-19 18:54:03,591 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 18:54:03,779 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 18:54:03,947 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 18:54:04,407 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-02-19 18:54:04,713 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-02-19 18:54:04,960 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 18:54:05,108 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 18:54:05,370 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 18:54:05,721 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 18:54:05,985 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 18:54:06,382 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-02-19 18:54:06,935 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-02-19 18:54:07,200 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 18:54:07,385 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-02-19 18:54:07,952 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 18:54:08,136 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-02-19 18:54:08,519 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-02-19 18:54:08,835 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-02-19 18:54:09,131 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-02-19 18:54:09,442 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:54:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:09,771 INFO L93 Difference]: Finished difference Result 7498 states and 24603 transitions. [2021-02-19 18:54:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:54:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) 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 [2021-02-19 18:54:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:09,783 INFO L225 Difference]: With dead ends: 7498 [2021-02-19 18:54:09,783 INFO L226 Difference]: Without dead ends: 7472 [2021-02-19 18:54:09,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=728, Invalid=5752, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:54:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-02-19 18:54:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 5600. [2021-02-19 18:54:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 3.388105018753349) internal successors, (18970), 5599 states have internal predecessors, (18970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 18970 transitions. [2021-02-19 18:54:09,863 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 18970 transitions. Word has length 30 [2021-02-19 18:54:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:09,863 INFO L480 AbstractCegarLoop]: Abstraction has 5600 states and 18970 transitions. [2021-02-19 18:54:09,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) 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) [2021-02-19 18:54:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 18970 transitions. [2021-02-19 18:54:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:09,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:09,870 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:10,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:10,070 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 26877953, now seen corresponding path program 22 times [2021-02-19 18:54:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:10,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954256284] [2021-02-19 18:54:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:10,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954256284] [2021-02-19 18:54:10,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121340998] [2021-02-19 18:54:10,454 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 [2021-02-19 18:54:10,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:10,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:10,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:10,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:10,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-02-19 18:54:10,770 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:10,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:10,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:10,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-02-19 18:54:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:10,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:10,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:54:10,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111766421] [2021-02-19 18:54:10,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:54:10,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:54:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:54:10,875 INFO L87 Difference]: Start difference. First operand 5600 states and 18970 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-02-19 18:54:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:15,332 INFO L93 Difference]: Finished difference Result 7962 states and 25585 transitions. [2021-02-19 18:54:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:54:15,333 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 [2021-02-19 18:54:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:15,345 INFO L225 Difference]: With dead ends: 7962 [2021-02-19 18:54:15,345 INFO L226 Difference]: Without dead ends: 7913 [2021-02-19 18:54:15,345 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=422, Invalid=3484, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:54:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2021-02-19 18:54:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 5625. [2021-02-19 18:54:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5625 states, 5624 states have (on average 3.3867354196301567) internal successors, (19047), 5624 states have internal predecessors, (19047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5625 states to 5625 states and 19047 transitions. [2021-02-19 18:54:15,428 INFO L78 Accepts]: Start accepts. Automaton has 5625 states and 19047 transitions. Word has length 30 [2021-02-19 18:54:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:15,428 INFO L480 AbstractCegarLoop]: Abstraction has 5625 states and 19047 transitions. [2021-02-19 18:54:15,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-02-19 18:54:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5625 states and 19047 transitions. [2021-02-19 18:54:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:15,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:15,435 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:15,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:15,636 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1818867861, now seen corresponding path program 23 times [2021-02-19 18:54:15,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:15,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686658093] [2021-02-19 18:54:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:16,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686658093] [2021-02-19 18:54:16,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015763263] [2021-02-19 18:54:16,008 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 [2021-02-19 18:54:16,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:54:16,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 18:54:16,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:16,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:16,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:16,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:54:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:16,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:16,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-02-19 18:54:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694128554] [2021-02-19 18:54:16,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:54:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:54:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:54:16,448 INFO L87 Difference]: Start difference. First operand 5625 states and 19047 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-02-19 18:54:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:19,014 INFO L93 Difference]: Finished difference Result 6840 states and 22336 transitions. [2021-02-19 18:54:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:54:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 30 [2021-02-19 18:54:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:19,026 INFO L225 Difference]: With dead ends: 6840 [2021-02-19 18:54:19,027 INFO L226 Difference]: Without dead ends: 6810 [2021-02-19 18:54:19,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:54:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6810 states. [2021-02-19 18:54:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6810 to 5617. [2021-02-19 18:54:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.387286324786325) internal successors, (19023), 5616 states have internal predecessors, (19023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 19023 transitions. [2021-02-19 18:54:19,133 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 19023 transitions. Word has length 30 [2021-02-19 18:54:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:19,133 INFO L480 AbstractCegarLoop]: Abstraction has 5617 states and 19023 transitions. [2021-02-19 18:54:19,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-02-19 18:54:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 19023 transitions. [2021-02-19 18:54:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:19,140 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:19,140 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:19,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:19,340 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash 829516223, now seen corresponding path program 24 times [2021-02-19 18:54:19,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:19,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152177942] [2021-02-19 18:54:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:19,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152177942] [2021-02-19 18:54:19,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126479388] [2021-02-19 18:54:19,774 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) [2021-02-19 18:54:19,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:19,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:20,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:20,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:54:20,070 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:20,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:20,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:20,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:54:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:20,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:20,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:54:20,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551326423] [2021-02-19 18:54:20,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:54:20,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:54:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:54:20,212 INFO L87 Difference]: Start difference. First operand 5617 states and 19023 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:54:21,559 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:54:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:24,928 INFO L93 Difference]: Finished difference Result 7499 states and 24237 transitions. [2021-02-19 18:54:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:54:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-02-19 18:54:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:24,941 INFO L225 Difference]: With dead ends: 7499 [2021-02-19 18:54:24,941 INFO L226 Difference]: Without dead ends: 7453 [2021-02-19 18:54:24,941 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=533, Invalid=4023, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:54:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2021-02-19 18:54:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 5603. [2021-02-19 18:54:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5602 states have (on average 3.387361656551232) internal successors, (18976), 5602 states have internal predecessors, (18976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 18976 transitions. [2021-02-19 18:54:25,023 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 18976 transitions. Word has length 30 [2021-02-19 18:54:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:25,023 INFO L480 AbstractCegarLoop]: Abstraction has 5603 states and 18976 transitions. [2021-02-19 18:54:25,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:54:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 18976 transitions. [2021-02-19 18:54:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:25,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:25,029 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:25,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:25,230 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash -49098667, now seen corresponding path program 25 times [2021-02-19 18:54:25,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:25,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140039494] [2021-02-19 18:54:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:25,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140039494] [2021-02-19 18:54:25,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105675820] [2021-02-19 18:54:25,627 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 [2021-02-19 18:54:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:25,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:25,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:25,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:54:25,859 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:25,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:25,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:25,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:54:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:25,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:25,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:54:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701118269] [2021-02-19 18:54:25,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:54:25,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:54:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:54:25,988 INFO L87 Difference]: Start difference. First operand 5603 states and 18976 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:54:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:29,833 INFO L93 Difference]: Finished difference Result 7994 states and 26327 transitions. [2021-02-19 18:54:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:54:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-02-19 18:54:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:29,847 INFO L225 Difference]: With dead ends: 7994 [2021-02-19 18:54:29,847 INFO L226 Difference]: Without dead ends: 7969 [2021-02-19 18:54:29,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=410, Invalid=3012, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:54:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7969 states. [2021-02-19 18:54:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7969 to 5587. [2021-02-19 18:54:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.387218045112782) internal successors, (18921), 5586 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18921 transitions. [2021-02-19 18:54:29,941 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18921 transitions. Word has length 30 [2021-02-19 18:54:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:29,941 INFO L480 AbstractCegarLoop]: Abstraction has 5587 states and 18921 transitions. [2021-02-19 18:54:29,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:54:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18921 transitions. [2021-02-19 18:54:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:29,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:29,948 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:30,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:30,148 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash -95625668, now seen corresponding path program 30 times [2021-02-19 18:54:30,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:30,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335232848] [2021-02-19 18:54:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:30,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335232848] [2021-02-19 18:54:30,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892057405] [2021-02-19 18:54:30,297 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 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 [2021-02-19 18:54:30,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:30,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:30,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:30,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:54:30,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:30,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:30,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:30,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-02-19 18:54:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:30,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:30,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-02-19 18:54:30,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206892295] [2021-02-19 18:54:30,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:54:30,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:30,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:54:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:54:30,955 INFO L87 Difference]: Start difference. First operand 5587 states and 18921 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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) [2021-02-19 18:54:31,478 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 18:54:31,898 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 18:54:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:32,592 INFO L93 Difference]: Finished difference Result 7053 states and 23350 transitions. [2021-02-19 18:54:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:54:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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 [2021-02-19 18:54:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:32,604 INFO L225 Difference]: With dead ends: 7053 [2021-02-19 18:54:32,604 INFO L226 Difference]: Without dead ends: 6915 [2021-02-19 18:54:32,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:54:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2021-02-19 18:54:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 5621. [2021-02-19 18:54:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 5620 states have (on average 3.38932384341637) internal successors, (19048), 5620 states have internal predecessors, (19048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 19048 transitions. [2021-02-19 18:54:32,682 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 19048 transitions. Word has length 30 [2021-02-19 18:54:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:32,682 INFO L480 AbstractCegarLoop]: Abstraction has 5621 states and 19048 transitions. [2021-02-19 18:54:32,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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) [2021-02-19 18:54:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 19048 transitions. [2021-02-19 18:54:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:32,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:32,688 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:32,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 18:54:32,889 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1886093489, now seen corresponding path program 26 times [2021-02-19 18:54:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:32,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920782850] [2021-02-19 18:54:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:33,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920782850] [2021-02-19 18:54:33,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743761004] [2021-02-19 18:54:33,465 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 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 [2021-02-19 18:54:33,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:33,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:33,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:54:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:33,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:33,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:54:33,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:33,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:33,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:33,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:35 [2021-02-19 18:54:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:33,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:33,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-02-19 18:54:33,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220139167] [2021-02-19 18:54:33,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:54:33,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:54:33,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:54:33,994 INFO L87 Difference]: Start difference. First operand 5621 states and 19048 transitions. Second operand has 25 states, 25 states have (on average 2.12) 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) [2021-02-19 18:54:34,949 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 18:54:35,546 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-02-19 18:54:36,394 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-02-19 18:54:36,637 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:54:36,776 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 18:54:37,012 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 18:54:37,178 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 18:54:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:38,152 INFO L93 Difference]: Finished difference Result 8913 states and 29155 transitions. [2021-02-19 18:54:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:54:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) 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 [2021-02-19 18:54:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:38,167 INFO L225 Difference]: With dead ends: 8913 [2021-02-19 18:54:38,167 INFO L226 Difference]: Without dead ends: 8868 [2021-02-19 18:54:38,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=479, Invalid=3303, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:54:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-02-19 18:54:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 5664. [2021-02-19 18:54:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 3.391665195126258) internal successors, (19207), 5663 states have internal predecessors, (19207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 19207 transitions. [2021-02-19 18:54:38,253 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 19207 transitions. Word has length 30 [2021-02-19 18:54:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:38,253 INFO L480 AbstractCegarLoop]: Abstraction has 5664 states and 19207 transitions. [2021-02-19 18:54:38,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) 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) [2021-02-19 18:54:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 19207 transitions. [2021-02-19 18:54:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:38,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:38,260 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:38,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:38,460 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1920353119, now seen corresponding path program 27 times [2021-02-19 18:54:38,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:38,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134956887] [2021-02-19 18:54:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134956887] [2021-02-19 18:54:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660465663] [2021-02-19 18:54:38,795 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 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 [2021-02-19 18:54:38,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:54:38,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:54:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:39,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-02-19 18:54:39,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:39,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:39,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:39,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:182 [2021-02-19 18:54:39,399 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-02-19 18:54:39,584 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:54:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:39,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-02-19 18:54:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307130375] [2021-02-19 18:54:39,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:54:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:54:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:54:39,634 INFO L87 Difference]: Start difference. First operand 5664 states and 19207 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-02-19 18:54:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:42,826 INFO L93 Difference]: Finished difference Result 10327 states and 33409 transitions. [2021-02-19 18:54:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:54:42,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 [2021-02-19 18:54:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:42,845 INFO L225 Difference]: With dead ends: 10327 [2021-02-19 18:54:42,846 INFO L226 Difference]: Without dead ends: 10285 [2021-02-19 18:54:42,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:54:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10285 states. [2021-02-19 18:54:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10285 to 5725. [2021-02-19 18:54:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5725 states, 5724 states have (on average 3.393256464011181) internal successors, (19423), 5724 states have internal predecessors, (19423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5725 states to 5725 states and 19423 transitions. [2021-02-19 18:54:42,951 INFO L78 Accepts]: Start accepts. Automaton has 5725 states and 19423 transitions. Word has length 30 [2021-02-19 18:54:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:42,951 INFO L480 AbstractCegarLoop]: Abstraction has 5725 states and 19423 transitions. [2021-02-19 18:54:42,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-02-19 18:54:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5725 states and 19423 transitions. [2021-02-19 18:54:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:42,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:42,958 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:43,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-02-19 18:54:43,159 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash 518184447, now seen corresponding path program 28 times [2021-02-19 18:54:43,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:43,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940141046] [2021-02-19 18:54:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:43,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940141046] [2021-02-19 18:54:43,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584451963] [2021-02-19 18:54:43,536 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 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 [2021-02-19 18:54:43,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:43,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:43,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:43,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:43,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:54:43,839 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:43,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:43,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:43,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:54:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:43,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:43,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 18:54:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51704239] [2021-02-19 18:54:43,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:54:43,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:54:43,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:54:43,925 INFO L87 Difference]: Start difference. First operand 5725 states and 19423 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-02-19 18:54:47,193 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 18:54:47,830 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:54:48,565 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-02-19 18:54:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:50,268 INFO L93 Difference]: Finished difference Result 10309 states and 33644 transitions. [2021-02-19 18:54:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-02-19 18:54:50,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 [2021-02-19 18:54:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:50,290 INFO L225 Difference]: With dead ends: 10309 [2021-02-19 18:54:50,291 INFO L226 Difference]: Without dead ends: 10257 [2021-02-19 18:54:50,292 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=781, Invalid=6529, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 18:54:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10257 states. [2021-02-19 18:54:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10257 to 5897. [2021-02-19 18:54:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5897 states, 5896 states have (on average 3.408921302578019) internal successors, (20099), 5896 states have internal predecessors, (20099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5897 states to 5897 states and 20099 transitions. [2021-02-19 18:54:50,449 INFO L78 Accepts]: Start accepts. Automaton has 5897 states and 20099 transitions. Word has length 30 [2021-02-19 18:54:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:50,449 INFO L480 AbstractCegarLoop]: Abstraction has 5897 states and 20099 transitions. [2021-02-19 18:54:50,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-02-19 18:54:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5897 states and 20099 transitions. [2021-02-19 18:54:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:50,456 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:50,456 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:50,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:50,656 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2098715955, now seen corresponding path program 29 times [2021-02-19 18:54:50,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:50,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19245146] [2021-02-19 18:54:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:51,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19245146] [2021-02-19 18:54:51,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483992189] [2021-02-19 18:54:51,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:54:51,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:54:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:51,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:51,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:54:51,386 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:51,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:51,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:54:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:51,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:51,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:54:51,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727360109] [2021-02-19 18:54:51,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:54:51,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:54:51,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:54:51,518 INFO L87 Difference]: Start difference. First operand 5897 states and 20099 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:54:52,269 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 18:54:52,479 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 18:54:53,044 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:54:54,043 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-02-19 18:54:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:56,900 INFO L93 Difference]: Finished difference Result 9026 states and 29838 transitions. [2021-02-19 18:54:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:54:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-02-19 18:54:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:56,915 INFO L225 Difference]: With dead ends: 9026 [2021-02-19 18:54:56,915 INFO L226 Difference]: Without dead ends: 9001 [2021-02-19 18:54:56,915 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=672, Invalid=4298, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:54:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9001 states. [2021-02-19 18:54:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9001 to 5893. [2021-02-19 18:54:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 3.4091989137813985) internal successors, (20087), 5892 states have internal predecessors, (20087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 20087 transitions. [2021-02-19 18:54:57,014 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 20087 transitions. Word has length 30 [2021-02-19 18:54:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:57,014 INFO L480 AbstractCegarLoop]: Abstraction has 5893 states and 20087 transitions. [2021-02-19 18:54:57,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-02-19 18:54:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 20087 transitions. [2021-02-19 18:54:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:57,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:57,021 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:57,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:57,221 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 536019340, now seen corresponding path program 31 times [2021-02-19 18:54:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:57,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797284773] [2021-02-19 18:54:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:57,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797284773] [2021-02-19 18:54:57,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719917721] [2021-02-19 18:54:57,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:54:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:57,629 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 19 treesize of output 11 [2021-02-19 18:54:57,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:57,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:57,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:57,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-02-19 18:54:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:57,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:57,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 18:54:57,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179196808] [2021-02-19 18:54:57,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:54:57,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:54:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:54:57,672 INFO L87 Difference]: Start difference. First operand 5893 states and 20087 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-02-19 18:54:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:58,066 INFO L93 Difference]: Finished difference Result 6419 states and 21643 transitions. [2021-02-19 18:54:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:54:58,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 [2021-02-19 18:54:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:58,080 INFO L225 Difference]: With dead ends: 6419 [2021-02-19 18:54:58,080 INFO L226 Difference]: Without dead ends: 6350 [2021-02-19 18:54:58,080 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:54:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-02-19 18:54:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 5915. [2021-02-19 18:54:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5915 states, 5914 states have (on average 3.4075076090632397) internal successors, (20152), 5914 states have internal predecessors, (20152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5915 states to 5915 states and 20152 transitions. [2021-02-19 18:54:58,160 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 20152 transitions. Word has length 30 [2021-02-19 18:54:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:58,160 INFO L480 AbstractCegarLoop]: Abstraction has 5915 states and 20152 transitions. [2021-02-19 18:54:58,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-02-19 18:54:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 20152 transitions. [2021-02-19 18:54:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:58,168 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:58,168 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:58,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-02-19 18:54:58,368 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1607393345, now seen corresponding path program 30 times [2021-02-19 18:54:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:58,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11252564] [2021-02-19 18:54:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:58,721 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:54:58,844 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 18:54:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:59,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11252564] [2021-02-19 18:54:59,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822578781] [2021-02-19 18:54:59,170 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 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 [2021-02-19 18:54:59,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:59,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:54:59,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:59,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:59,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:59,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-02-19 18:54:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:59,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:59,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:54:59,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982994764] [2021-02-19 18:54:59,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:54:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:54:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:54:59,574 INFO L87 Difference]: Start difference. First operand 5915 states and 20152 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:55:01,199 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 18:55:02,277 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-02-19 18:55:02,534 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 18:55:03,359 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-19 18:55:03,591 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-02-19 18:55:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:05,148 INFO L93 Difference]: Finished difference Result 9033 states and 29671 transitions. [2021-02-19 18:55:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:55:05,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 [2021-02-19 18:55:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:05,164 INFO L225 Difference]: With dead ends: 9033 [2021-02-19 18:55:05,164 INFO L226 Difference]: Without dead ends: 9007 [2021-02-19 18:55:05,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=529, Invalid=3503, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:55:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9007 states. [2021-02-19 18:55:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9007 to 5923. [2021-02-19 18:55:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5923 states, 5922 states have (on average 3.408645727794664) internal successors, (20186), 5922 states have internal predecessors, (20186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5923 states to 5923 states and 20186 transitions. [2021-02-19 18:55:05,259 INFO L78 Accepts]: Start accepts. Automaton has 5923 states and 20186 transitions. Word has length 30 [2021-02-19 18:55:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:05,259 INFO L480 AbstractCegarLoop]: Abstraction has 5923 states and 20186 transitions. [2021-02-19 18:55:05,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:55:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5923 states and 20186 transitions. [2021-02-19 18:55:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:05,266 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:05,266 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:05,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:05,467 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash 952802175, now seen corresponding path program 31 times [2021-02-19 18:55:05,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:05,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480876987] [2021-02-19 18:55:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:05,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480876987] [2021-02-19 18:55:05,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231732982] [2021-02-19 18:55:05,872 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 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 [2021-02-19 18:55:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:05,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:55:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:06,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:55:06,316 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:55:06,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:06,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:06,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-02-19 18:55:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:06,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:06,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:55:06,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225364242] [2021-02-19 18:55:06,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:06,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:06,449 INFO L87 Difference]: Start difference. First operand 5923 states and 20186 transitions. Second operand has 25 states, 25 states have (on average 2.16) 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) [2021-02-19 18:55:07,047 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 18:55:07,852 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-02-19 18:55:08,203 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 18:55:08,848 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:55:10,063 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 18:55:11,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:11,125 INFO L93 Difference]: Finished difference Result 10613 states and 34671 transitions. [2021-02-19 18:55:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:55:11,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) 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) Word has length 30 [2021-02-19 18:55:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:11,144 INFO L225 Difference]: With dead ends: 10613 [2021-02-19 18:55:11,144 INFO L226 Difference]: Without dead ends: 10546 [2021-02-19 18:55:11,145 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=687, Invalid=3869, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:55:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-02-19 18:55:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 5969. [2021-02-19 18:55:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5969 states, 5968 states have (on average 3.413706434316354) internal successors, (20373), 5968 states have internal predecessors, (20373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5969 states to 5969 states and 20373 transitions. [2021-02-19 18:55:11,261 INFO L78 Accepts]: Start accepts. Automaton has 5969 states and 20373 transitions. Word has length 30 [2021-02-19 18:55:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:11,261 INFO L480 AbstractCegarLoop]: Abstraction has 5969 states and 20373 transitions. [2021-02-19 18:55:11,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) 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) [2021-02-19 18:55:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5969 states and 20373 transitions. [2021-02-19 18:55:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:11,269 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:11,269 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:11,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:11,470 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1626544945, now seen corresponding path program 32 times [2021-02-19 18:55:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592509315] [2021-02-19 18:55:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:12,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592509315] [2021-02-19 18:55:12,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31248578] [2021-02-19 18:55:12,027 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 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 [2021-02-19 18:55:12,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:12,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:55:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:12,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:12,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-02-19 18:55:12,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:12,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:12,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:12,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:43 [2021-02-19 18:55:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:12,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:12,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:55:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382712688] [2021-02-19 18:55:12,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:12,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:12,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:12,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:12,738 INFO L87 Difference]: Start difference. First operand 5969 states and 20373 transitions. Second operand has 25 states, 25 states have (on average 2.16) 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) [2021-02-19 18:55:15,560 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 18:55:16,085 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-02-19 18:55:16,874 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 18:55:17,918 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-02-19 18:55:18,586 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:55:19,583 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 18:55:19,936 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 18:55:20,091 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 18:55:20,259 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-02-19 18:55:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:20,358 INFO L93 Difference]: Finished difference Result 10218 states and 33393 transitions. [2021-02-19 18:55:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-02-19 18:55:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) 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) Word has length 30 [2021-02-19 18:55:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:20,376 INFO L225 Difference]: With dead ends: 10218 [2021-02-19 18:55:20,376 INFO L226 Difference]: Without dead ends: 10146 [2021-02-19 18:55:20,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=846, Invalid=7164, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:55:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10146 states. [2021-02-19 18:55:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10146 to 6104. [2021-02-19 18:55:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 6103 states have (on average 3.420448959528101) internal successors, (20875), 6103 states have internal predecessors, (20875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 20875 transitions. [2021-02-19 18:55:20,548 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 20875 transitions. Word has length 30 [2021-02-19 18:55:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:20,548 INFO L480 AbstractCegarLoop]: Abstraction has 6104 states and 20875 transitions. [2021-02-19 18:55:20,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) 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) [2021-02-19 18:55:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 20875 transitions. [2021-02-19 18:55:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:20,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:20,558 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:20,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-02-19 18:55:20,759 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1674472685, now seen corresponding path program 33 times [2021-02-19 18:55:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:20,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931826205] [2021-02-19 18:55:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931826205] [2021-02-19 18:55:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800351617] [2021-02-19 18:55:21,383 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 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 [2021-02-19 18:55:21,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:55:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:55:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:21,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:55:21,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:21,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:21,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:21,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-02-19 18:55:21,953 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 18:55:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:22,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:22,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:55:22,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133276885] [2021-02-19 18:55:22,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:22,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:22,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:22,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:22,178 INFO L87 Difference]: Start difference. First operand 6104 states and 20875 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-02-19 18:55:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:24,569 INFO L93 Difference]: Finished difference Result 9608 states and 31897 transitions. [2021-02-19 18:55:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:55:24,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-02-19 18:55:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:24,589 INFO L225 Difference]: With dead ends: 9608 [2021-02-19 18:55:24,589 INFO L226 Difference]: Without dead ends: 9543 [2021-02-19 18:55:24,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:55:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-02-19 18:55:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 6143. [2021-02-19 18:55:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6143 states, 6142 states have (on average 3.4244545750569846) internal successors, (21033), 6142 states have internal predecessors, (21033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6143 states to 6143 states and 21033 transitions. [2021-02-19 18:55:24,696 INFO L78 Accepts]: Start accepts. Automaton has 6143 states and 21033 transitions. Word has length 30 [2021-02-19 18:55:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:24,697 INFO L480 AbstractCegarLoop]: Abstraction has 6143 states and 21033 transitions. [2021-02-19 18:55:24,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-02-19 18:55:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 6143 states and 21033 transitions. [2021-02-19 18:55:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:24,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:24,704 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:24,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-02-19 18:55:24,905 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash -892419889, now seen corresponding path program 34 times [2021-02-19 18:55:24,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:24,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582800104] [2021-02-19 18:55:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:25,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582800104] [2021-02-19 18:55:25,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885867886] [2021-02-19 18:55:25,541 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 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 [2021-02-19 18:55:25,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:55:25,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:55:25,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:26,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:26,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:55:26,030 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:55:26,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:26,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:26,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-02-19 18:55:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:26,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:26,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:55:26,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169034222] [2021-02-19 18:55:26,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:26,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:26,226 INFO L87 Difference]: Start difference. First operand 6143 states and 21033 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-02-19 18:55:27,277 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-02-19 18:55:27,808 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 18:55:28,873 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 18:55:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:29,231 INFO L93 Difference]: Finished difference Result 9903 states and 32891 transitions. [2021-02-19 18:55:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:55:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 30 [2021-02-19 18:55:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:29,249 INFO L225 Difference]: With dead ends: 9903 [2021-02-19 18:55:29,250 INFO L226 Difference]: Without dead ends: 9832 [2021-02-19 18:55:29,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:55:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9832 states. [2021-02-19 18:55:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9832 to 6111. [2021-02-19 18:55:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6111 states, 6110 states have (on average 3.4216039279869066) internal successors, (20906), 6110 states have internal predecessors, (20906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 20906 transitions. [2021-02-19 18:55:29,376 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 20906 transitions. Word has length 30 [2021-02-19 18:55:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:29,376 INFO L480 AbstractCegarLoop]: Abstraction has 6111 states and 20906 transitions. [2021-02-19 18:55:29,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-02-19 18:55:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 20906 transitions. [2021-02-19 18:55:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:29,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:29,384 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:29,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:29,584 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1740944048, now seen corresponding path program 32 times [2021-02-19 18:55:29,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:29,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526664460] [2021-02-19 18:55:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526664460] [2021-02-19 18:55:29,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585111894] [2021-02-19 18:55:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:29,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:29,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:55:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:30,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:30,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:55:30,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:30,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:30,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:30,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-02-19 18:55:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:30,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:30,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2021-02-19 18:55:30,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931041334] [2021-02-19 18:55:30,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:55:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:55:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:55:30,478 INFO L87 Difference]: Start difference. First operand 6111 states and 20906 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-02-19 18:55:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:32,547 INFO L93 Difference]: Finished difference Result 6822 states and 22986 transitions. [2021-02-19 18:55:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:55:32,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 [2021-02-19 18:55:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:32,559 INFO L225 Difference]: With dead ends: 6822 [2021-02-19 18:55:32,560 INFO L226 Difference]: Without dead ends: 6760 [2021-02-19 18:55:32,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:55:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2021-02-19 18:55:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6121. [2021-02-19 18:55:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6121 states, 6120 states have (on average 3.420424836601307) internal successors, (20933), 6120 states have internal predecessors, (20933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6121 states to 6121 states and 20933 transitions. [2021-02-19 18:55:32,654 INFO L78 Accepts]: Start accepts. Automaton has 6121 states and 20933 transitions. Word has length 30 [2021-02-19 18:55:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:32,654 INFO L480 AbstractCegarLoop]: Abstraction has 6121 states and 20933 transitions. [2021-02-19 18:55:32,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-02-19 18:55:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6121 states and 20933 transitions. [2021-02-19 18:55:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:32,661 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:32,661 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:32,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:32,862 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1797649280, now seen corresponding path program 33 times [2021-02-19 18:55:32,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:32,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027674431] [2021-02-19 18:55:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027674431] [2021-02-19 18:55:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184198987] [2021-02-19 18:55:33,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:55:33,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:55:33,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 18:55:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:33,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:33,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:55:33,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:33,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:33,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:33,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:139 [2021-02-19 18:55:33,820 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:55:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:34,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:34,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 24 [2021-02-19 18:55:34,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200005457] [2021-02-19 18:55:34,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:55:34,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:34,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:55:34,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:55:34,169 INFO L87 Difference]: Start difference. First operand 6121 states and 20933 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2021-02-19 18:55:36,298 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:55:36,935 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-02-19 18:55:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:37,238 INFO L93 Difference]: Finished difference Result 6878 states and 23145 transitions. [2021-02-19 18:55:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:55:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 [2021-02-19 18:55:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:37,251 INFO L225 Difference]: With dead ends: 6878 [2021-02-19 18:55:37,251 INFO L226 Difference]: Without dead ends: 6848 [2021-02-19 18:55:37,251 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:55:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-02-19 18:55:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6149. [2021-02-19 18:55:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6149 states, 6148 states have (on average 3.420787247885491) internal successors, (21031), 6148 states have internal predecessors, (21031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6149 states to 6149 states and 21031 transitions. [2021-02-19 18:55:37,337 INFO L78 Accepts]: Start accepts. Automaton has 6149 states and 21031 transitions. Word has length 30 [2021-02-19 18:55:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:37,337 INFO L480 AbstractCegarLoop]: Abstraction has 6149 states and 21031 transitions. [2021-02-19 18:55:37,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2021-02-19 18:55:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6149 states and 21031 transitions. [2021-02-19 18:55:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:37,344 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:37,344 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:37,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:37,545 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -864683205, now seen corresponding path program 35 times [2021-02-19 18:55:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:37,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525608452] [2021-02-19 18:55:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:37,810 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:55:37,942 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:55:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:38,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525608452] [2021-02-19 18:55:38,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373771665] [2021-02-19 18:55:38,413 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 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 [2021-02-19 18:55:38,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:55:38,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:55:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:38,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:38,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:38,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:55:38,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:38,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:38,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:38,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-02-19 18:55:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:38,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:38,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-02-19 18:55:38,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309470692] [2021-02-19 18:55:38,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:55:38,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:55:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:55:38,858 INFO L87 Difference]: Start difference. First operand 6149 states and 21031 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:55:40,038 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-02-19 18:55:40,844 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 18:55:41,018 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 18:55:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:42,661 INFO L93 Difference]: Finished difference Result 7779 states and 25936 transitions. [2021-02-19 18:55:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:55:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 [2021-02-19 18:55:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:42,675 INFO L225 Difference]: With dead ends: 7779 [2021-02-19 18:55:42,675 INFO L226 Difference]: Without dead ends: 7753 [2021-02-19 18:55:42,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:55:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-02-19 18:55:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6153. [2021-02-19 18:55:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 3.4201885565669703) internal successors, (21041), 6152 states have internal predecessors, (21041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 21041 transitions. [2021-02-19 18:55:42,770 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 21041 transitions. Word has length 30 [2021-02-19 18:55:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:42,770 INFO L480 AbstractCegarLoop]: Abstraction has 6153 states and 21041 transitions. [2021-02-19 18:55:42,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:55:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 21041 transitions. [2021-02-19 18:55:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:42,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:42,777 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:42,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:42,977 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1839026309, now seen corresponding path program 36 times [2021-02-19 18:55:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:42,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197022844] [2021-02-19 18:55:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:43,379 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:55:43,532 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 18:55:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:43,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197022844] [2021-02-19 18:55:43,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545682203] [2021-02-19 18:55:43,865 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 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 [2021-02-19 18:55:43,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:55:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:43,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:55:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:44,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:44,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:44,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-02-19 18:55:44,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:44,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:44,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:44,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:64 [2021-02-19 18:55:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:44,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:44,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-02-19 18:55:44,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736480486] [2021-02-19 18:55:44,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:55:44,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:55:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:55:44,578 INFO L87 Difference]: Start difference. First operand 6153 states and 21041 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:55:46,076 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-02-19 18:55:46,467 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 18:55:47,576 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 18:55:47,746 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 18:55:48,945 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 18:55:49,179 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 18:55:49,382 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 18:55:50,963 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:55:52,345 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 18:55:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:52,898 INFO L93 Difference]: Finished difference Result 8743 states and 29142 transitions. [2021-02-19 18:55:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:55:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 [2021-02-19 18:55:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:52,915 INFO L225 Difference]: With dead ends: 8743 [2021-02-19 18:55:52,915 INFO L226 Difference]: Without dead ends: 8686 [2021-02-19 18:55:52,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=771, Invalid=6201, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:55:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8686 states. [2021-02-19 18:55:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8686 to 6277. [2021-02-19 18:55:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6276 states have (on average 3.415869980879541) internal successors, (21438), 6276 states have internal predecessors, (21438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 21438 transitions. [2021-02-19 18:55:53,013 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 21438 transitions. Word has length 30 [2021-02-19 18:55:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:53,013 INFO L480 AbstractCegarLoop]: Abstraction has 6277 states and 21438 transitions. [2021-02-19 18:55:53,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:55:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 21438 transitions. [2021-02-19 18:55:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:53,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:53,021 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:53,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-02-19 18:55:53,221 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash -785264317, now seen corresponding path program 37 times [2021-02-19 18:55:53,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:53,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613144576] [2021-02-19 18:55:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:53,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613144576] [2021-02-19 18:55:53,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078782458] [2021-02-19 18:55:53,789 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 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 [2021-02-19 18:55:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:55:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:54,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:54,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:55:54,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:54,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:54,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:54,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-02-19 18:55:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:54,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:54,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:55:54,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891276791] [2021-02-19 18:55:54,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:54,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:54,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:54,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:54,385 INFO L87 Difference]: Start difference. First operand 6277 states and 21438 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-02-19 18:55:55,977 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-02-19 18:55:56,561 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-19 18:55:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:58,667 INFO L93 Difference]: Finished difference Result 9495 states and 31565 transitions. [2021-02-19 18:55:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:55:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-02-19 18:55:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:58,685 INFO L225 Difference]: With dead ends: 9495 [2021-02-19 18:55:58,685 INFO L226 Difference]: Without dead ends: 9474 [2021-02-19 18:55:58,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=468, Invalid=2954, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:55:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9474 states. [2021-02-19 18:55:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9474 to 6302. [2021-02-19 18:55:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 6301 states have (on average 3.4150134899222344) internal successors, (21518), 6301 states have internal predecessors, (21518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 21518 transitions. [2021-02-19 18:55:58,828 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 21518 transitions. Word has length 30 [2021-02-19 18:55:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:58,828 INFO L480 AbstractCegarLoop]: Abstraction has 6302 states and 21518 transitions. [2021-02-19 18:55:58,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-02-19 18:55:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 21518 transitions. [2021-02-19 18:55:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:58,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:58,835 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:59,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-02-19 18:55:59,036 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash 987843519, now seen corresponding path program 38 times [2021-02-19 18:55:59,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:59,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014865903] [2021-02-19 18:55:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:59,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014865903] [2021-02-19 18:55:59,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676712086] [2021-02-19 18:55:59,664 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 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 [2021-02-19 18:55:59,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:59,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:55:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:00,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:00,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-02-19 18:56:00,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:56:00,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:00,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:00,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-02-19 18:56:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:00,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:00,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:56:00,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965166042] [2021-02-19 18:56:00,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:56:00,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:56:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:56:00,356 INFO L87 Difference]: Start difference. First operand 6302 states and 21518 transitions. Second operand has 25 states, 25 states have (on average 2.12) 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) [2021-02-19 18:56:01,189 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 18:56:01,475 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 18:56:02,176 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-02-19 18:56:02,868 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 18:56:03,163 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 18:56:04,732 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 18:56:05,857 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-02-19 18:56:06,378 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-02-19 18:56:07,014 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-19 18:56:07,629 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-19 18:56:07,802 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-02-19 18:56:08,239 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 18:56:09,152 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-02-19 18:56:09,861 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-02-19 18:56:10,063 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-02-19 18:56:10,246 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 18:56:10,569 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 18:56:10,850 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-02-19 18:56:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:10,942 INFO L93 Difference]: Finished difference Result 10895 states and 35792 transitions. [2021-02-19 18:56:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-02-19 18:56:10,948 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) 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 [2021-02-19 18:56:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:10,971 INFO L225 Difference]: With dead ends: 10895 [2021-02-19 18:56:10,972 INFO L226 Difference]: Without dead ends: 10828 [2021-02-19 18:56:10,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1377, Invalid=8925, Unknown=0, NotChecked=0, Total=10302 [2021-02-19 18:56:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10828 states. [2021-02-19 18:56:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10828 to 6312. [2021-02-19 18:56:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6312 states, 6311 states have (on average 3.4108699096815083) internal successors, (21526), 6311 states have internal predecessors, (21526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6312 states to 6312 states and 21526 transitions. [2021-02-19 18:56:11,167 INFO L78 Accepts]: Start accepts. Automaton has 6312 states and 21526 transitions. Word has length 30 [2021-02-19 18:56:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:11,167 INFO L480 AbstractCegarLoop]: Abstraction has 6312 states and 21526 transitions. [2021-02-19 18:56:11,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) 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) [2021-02-19 18:56:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6312 states and 21526 transitions. [2021-02-19 18:56:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:11,175 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:11,175 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:11,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:11,375 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash -118163469, now seen corresponding path program 39 times [2021-02-19 18:56:11,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280400935] [2021-02-19 18:56:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:11,629 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:56:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:12,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280400935] [2021-02-19 18:56:12,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688642308] [2021-02-19 18:56:12,086 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 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 [2021-02-19 18:56:12,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:56:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 18:56:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:12,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:56:12,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:12,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:12,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:12,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:16 [2021-02-19 18:56:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:12,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:12,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 24 [2021-02-19 18:56:12,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879168853] [2021-02-19 18:56:12,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:56:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:56:12,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:56:12,889 INFO L87 Difference]: Start difference. First operand 6312 states and 21526 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:15,777 INFO L93 Difference]: Finished difference Result 6638 states and 22353 transitions. [2021-02-19 18:56:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:56:15,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-02-19 18:56:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:15,789 INFO L225 Difference]: With dead ends: 6638 [2021-02-19 18:56:15,789 INFO L226 Difference]: Without dead ends: 6604 [2021-02-19 18:56:15,789 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:56:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-02-19 18:56:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6305. [2021-02-19 18:56:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 6304 states have (on average 3.4116434010152283) internal successors, (21507), 6304 states have internal predecessors, (21507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 21507 transitions. [2021-02-19 18:56:15,870 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 21507 transitions. Word has length 30 [2021-02-19 18:56:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:15,870 INFO L480 AbstractCegarLoop]: Abstraction has 6305 states and 21507 transitions. [2021-02-19 18:56:15,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 21507 transitions. [2021-02-19 18:56:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:15,877 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:15,877 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:16,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-02-19 18:56:16,078 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:16,078 INFO L82 PathProgramCache]: Analyzing trace with hash -932357961, now seen corresponding path program 40 times [2021-02-19 18:56:16,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:16,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497609567] [2021-02-19 18:56:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:16,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497609567] [2021-02-19 18:56:16,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374129526] [2021-02-19 18:56:16,762 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 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 [2021-02-19 18:56:16,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:56:16,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:56:16,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:17,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:17,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-02-19 18:56:17,167 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:17,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:17,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:17,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-02-19 18:56:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:17,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:17,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-02-19 18:56:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733621453] [2021-02-19 18:56:17,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:56:17,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:17,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:56:17,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:56:17,355 INFO L87 Difference]: Start difference. First operand 6305 states and 21507 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-02-19 18:56:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:19,269 INFO L93 Difference]: Finished difference Result 8121 states and 27290 transitions. [2021-02-19 18:56:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:56:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-02-19 18:56:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:19,283 INFO L225 Difference]: With dead ends: 8121 [2021-02-19 18:56:19,284 INFO L226 Difference]: Without dead ends: 8096 [2021-02-19 18:56:19,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:56:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2021-02-19 18:56:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 6311. [2021-02-19 18:56:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6311 states, 6310 states have (on average 3.411568938193344) internal successors, (21527), 6310 states have internal predecessors, (21527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6311 states to 6311 states and 21527 transitions. [2021-02-19 18:56:19,375 INFO L78 Accepts]: Start accepts. Automaton has 6311 states and 21527 transitions. Word has length 30 [2021-02-19 18:56:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:19,375 INFO L480 AbstractCegarLoop]: Abstraction has 6311 states and 21527 transitions. [2021-02-19 18:56:19,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-02-19 18:56:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6311 states and 21527 transitions. [2021-02-19 18:56:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:19,386 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:19,386 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:19,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:19,607 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash -134883077, now seen corresponding path program 41 times [2021-02-19 18:56:19,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:19,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928992976] [2021-02-19 18:56:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928992976] [2021-02-19 18:56:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458224858] [2021-02-19 18:56:20,334 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 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 [2021-02-19 18:56:20,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:56:20,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:56:20,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:20,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 18:56:20,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:20,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:20,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:20,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-02-19 18:56:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:20,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:20,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-02-19 18:56:20,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880214749] [2021-02-19 18:56:20,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:56:20,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:20,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:56:20,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:56:20,900 INFO L87 Difference]: Start difference. First operand 6311 states and 21527 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-02-19 18:56:21,667 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 18:56:21,928 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 18:56:22,463 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 18:56:22,920 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:56:23,525 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 18:56:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:24,825 INFO L93 Difference]: Finished difference Result 7879 states and 26523 transitions. [2021-02-19 18:56:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:56:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-02-19 18:56:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:24,839 INFO L225 Difference]: With dead ends: 7879 [2021-02-19 18:56:24,839 INFO L226 Difference]: Without dead ends: 7864 [2021-02-19 18:56:24,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:56:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7864 states. [2021-02-19 18:56:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7864 to 6328. [2021-02-19 18:56:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 3.4114114114114114) internal successors, (21584), 6327 states have internal predecessors, (21584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 21584 transitions. [2021-02-19 18:56:24,933 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 21584 transitions. Word has length 30 [2021-02-19 18:56:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:24,934 INFO L480 AbstractCegarLoop]: Abstraction has 6328 states and 21584 transitions. [2021-02-19 18:56:24,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-02-19 18:56:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 21584 transitions. [2021-02-19 18:56:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:24,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:24,941 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:25,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:25,142 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:25,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1670665059, now seen corresponding path program 42 times [2021-02-19 18:56:25,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:25,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419404258] [2021-02-19 18:56:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:25,447 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:56:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:25,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419404258] [2021-02-19 18:56:25,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399316904] [2021-02-19 18:56:25,893 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 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 [2021-02-19 18:56:25,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:56:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:56:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:56:26,204 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:26,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:26,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:56:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:26,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:26,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:56:26,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862814146] [2021-02-19 18:56:26,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:56:26,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:26,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:56:26,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:56:26,370 INFO L87 Difference]: Start difference. First operand 6328 states and 21584 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:27,061 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 18:56:27,666 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 18:56:28,291 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:56:28,942 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-02-19 18:56:29,319 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 18:56:30,177 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 18:56:30,474 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-02-19 18:56:31,009 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 18:56:31,619 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 18:56:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:32,348 INFO L93 Difference]: Finished difference Result 8981 states and 30022 transitions. [2021-02-19 18:56:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:56:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-02-19 18:56:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:32,366 INFO L225 Difference]: With dead ends: 8981 [2021-02-19 18:56:32,366 INFO L226 Difference]: Without dead ends: 8956 [2021-02-19 18:56:32,367 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=578, Invalid=3844, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:56:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2021-02-19 18:56:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 6319. [2021-02-19 18:56:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6319 states, 6318 states have (on average 3.411047799936689) internal successors, (21551), 6318 states have internal predecessors, (21551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6319 states to 6319 states and 21551 transitions. [2021-02-19 18:56:32,476 INFO L78 Accepts]: Start accepts. Automaton has 6319 states and 21551 transitions. Word has length 30 [2021-02-19 18:56:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:32,476 INFO L480 AbstractCegarLoop]: Abstraction has 6319 states and 21551 transitions. [2021-02-19 18:56:32,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6319 states and 21551 transitions. [2021-02-19 18:56:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:32,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:32,484 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:32,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:32,684 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1785151513, now seen corresponding path program 43 times [2021-02-19 18:56:32,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:32,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590887797] [2021-02-19 18:56:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:32,919 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:56:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:33,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590887797] [2021-02-19 18:56:33,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487292859] [2021-02-19 18:56:33,364 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 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 [2021-02-19 18:56:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:56:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:33,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:56:33,679 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:33,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:33,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:33,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:56:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:33,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:33,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:56:33,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347425116] [2021-02-19 18:56:33,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:56:33,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:33,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:56:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:56:33,863 INFO L87 Difference]: Start difference. First operand 6319 states and 21551 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:35,020 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 18:56:35,611 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-02-19 18:56:35,785 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:56:36,761 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 18:56:37,991 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:56:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:39,351 INFO L93 Difference]: Finished difference Result 8359 states and 28089 transitions. [2021-02-19 18:56:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:56:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-02-19 18:56:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:39,367 INFO L225 Difference]: With dead ends: 8359 [2021-02-19 18:56:39,367 INFO L226 Difference]: Without dead ends: 8328 [2021-02-19 18:56:39,367 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=439, Invalid=3101, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:56:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8328 states. [2021-02-19 18:56:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8328 to 6327. [2021-02-19 18:56:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6326 states have (on average 3.410527979766045) internal successors, (21575), 6326 states have internal predecessors, (21575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 21575 transitions. [2021-02-19 18:56:39,468 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 21575 transitions. Word has length 30 [2021-02-19 18:56:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:39,468 INFO L480 AbstractCegarLoop]: Abstraction has 6327 states and 21575 transitions. [2021-02-19 18:56:39,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 21575 transitions. [2021-02-19 18:56:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:39,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:39,477 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:39,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-02-19 18:56:39,677 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1728446281, now seen corresponding path program 44 times [2021-02-19 18:56:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:39,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849430765] [2021-02-19 18:56:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:40,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849430765] [2021-02-19 18:56:40,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340637257] [2021-02-19 18:56:40,320 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 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 [2021-02-19 18:56:40,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:56:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:56:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:40,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:40,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:40,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:56:40,745 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:40,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:40,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:40,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:56:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:40,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:40,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:56:40,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800418613] [2021-02-19 18:56:40,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:56:40,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:56:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:56:40,890 INFO L87 Difference]: Start difference. First operand 6327 states and 21575 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:42,290 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-02-19 18:56:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:45,177 INFO L93 Difference]: Finished difference Result 8489 states and 28437 transitions. [2021-02-19 18:56:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:56:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-02-19 18:56:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:45,194 INFO L225 Difference]: With dead ends: 8489 [2021-02-19 18:56:45,194 INFO L226 Difference]: Without dead ends: 8454 [2021-02-19 18:56:45,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=357, Invalid=2613, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:56:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2021-02-19 18:56:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 6319. [2021-02-19 18:56:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6319 states, 6318 states have (on average 3.411047799936689) internal successors, (21551), 6318 states have internal predecessors, (21551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6319 states to 6319 states and 21551 transitions. [2021-02-19 18:56:45,296 INFO L78 Accepts]: Start accepts. Automaton has 6319 states and 21551 transitions. Word has length 30 [2021-02-19 18:56:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:45,297 INFO L480 AbstractCegarLoop]: Abstraction has 6319 states and 21551 transitions. [2021-02-19 18:56:45,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6319 states and 21551 transitions. [2021-02-19 18:56:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:45,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:45,305 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:45,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-02-19 18:56:45,507 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -500844896, now seen corresponding path program 24 times [2021-02-19 18:56:45,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:45,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896914959] [2021-02-19 18:56:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:45,761 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:56:46,006 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:56:46,343 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:56:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:46,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896914959] [2021-02-19 18:56:46,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762042586] [2021-02-19 18:56:46,640 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 [2021-02-19 18:56:46,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:56:46,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:56:46,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:47,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:47,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:47,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:47,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-02-19 18:56:47,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:56:47,310 INFO L628 ElimStorePlain]: treesize reduction 14, result has 56.3 percent of original size [2021-02-19 18:56:47,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:47,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-02-19 18:56:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:47,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:47,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-02-19 18:56:47,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954520847] [2021-02-19 18:56:47,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:56:47,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:47,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:56:47,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:56:47,438 INFO L87 Difference]: Start difference. First operand 6319 states and 21551 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) [2021-02-19 18:56:47,953 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 18:56:48,214 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 18:56:48,567 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-02-19 18:56:48,974 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-02-19 18:56:49,206 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-02-19 18:56:49,581 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 18:56:49,970 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 18:56:50,261 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 18:56:50,519 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 18:56:51,429 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 18:56:52,169 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-02-19 18:56:54,637 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 18:56:54,823 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 18:56:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:55,801 INFO L93 Difference]: Finished difference Result 8291 states and 27377 transitions. [2021-02-19 18:56:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:56:55,803 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 [2021-02-19 18:56:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:55,816 INFO L225 Difference]: With dead ends: 8291 [2021-02-19 18:56:55,816 INFO L226 Difference]: Without dead ends: 8250 [2021-02-19 18:56:55,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=586, Invalid=4816, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:56:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-02-19 18:56:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 6317. [2021-02-19 18:56:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 6316 states have (on average 3.409753008233059) internal successors, (21536), 6316 states have internal predecessors, (21536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 21536 transitions. [2021-02-19 18:56:55,908 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 21536 transitions. Word has length 30 [2021-02-19 18:56:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:55,908 INFO L480 AbstractCegarLoop]: Abstraction has 6317 states and 21536 transitions. [2021-02-19 18:56:55,908 INFO L481 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) [2021-02-19 18:56:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 21536 transitions. [2021-02-19 18:56:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:55,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:55,917 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:56,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:56,118 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash -677884922, now seen corresponding path program 25 times [2021-02-19 18:56:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:56,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309340850] [2021-02-19 18:56:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:56,378 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:56:56,614 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:56:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:57,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309340850] [2021-02-19 18:56:57,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582663369] [2021-02-19 18:56:57,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:56:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:56:57,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:57,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:57,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 18:56:57,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:57,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:57,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:57,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-02-19 18:56:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:57,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:57,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-02-19 18:56:57,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972907215] [2021-02-19 18:56:57,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:56:57,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:56:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:56:57,623 INFO L87 Difference]: Start difference. First operand 6317 states and 21536 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-02-19 18:56:59,579 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-02-19 18:57:01,372 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 18:57:01,800 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 18:57:02,787 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 18:57:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:03,080 INFO L93 Difference]: Finished difference Result 7807 states and 26121 transitions. [2021-02-19 18:57:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:57:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 [2021-02-19 18:57:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:03,094 INFO L225 Difference]: With dead ends: 7807 [2021-02-19 18:57:03,095 INFO L226 Difference]: Without dead ends: 7781 [2021-02-19 18:57:03,095 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:57:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-02-19 18:57:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 6329. [2021-02-19 18:57:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6328 states have (on average 3.4080278128950696) internal successors, (21566), 6328 states have internal predecessors, (21566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 21566 transitions. [2021-02-19 18:57:03,184 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 21566 transitions. Word has length 30 [2021-02-19 18:57:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:03,184 INFO L480 AbstractCegarLoop]: Abstraction has 6329 states and 21566 transitions. [2021-02-19 18:57:03,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-02-19 18:57:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 21566 transitions. [2021-02-19 18:57:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:03,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:03,192 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:03,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:03,392 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash -640122340, now seen corresponding path program 26 times [2021-02-19 18:57:03,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:03,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466790155] [2021-02-19 18:57:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:03,589 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 18:57:03,714 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:57:03,852 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 18:57:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466790155] [2021-02-19 18:57:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229795031] [2021-02-19 18:57:04,330 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 [2021-02-19 18:57:04,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:57:04,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:57:04,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:05,064 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-02-19 18:57:05,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-02-19 18:57:05,071 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:05,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:05,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:05,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-02-19 18:57:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:05,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-02-19 18:57:05,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798478725] [2021-02-19 18:57:05,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:57:05,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:57:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:57:05,181 INFO L87 Difference]: Start difference. First operand 6329 states and 21566 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-02-19 18:57:06,373 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-02-19 18:57:06,521 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 18:57:06,677 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 18:57:07,685 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-02-19 18:57:07,858 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-02-19 18:57:08,136 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-02-19 18:57:08,632 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-02-19 18:57:08,814 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-02-19 18:57:09,394 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 18:57:10,622 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-02-19 18:57:10,899 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 18:57:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:11,136 INFO L93 Difference]: Finished difference Result 8137 states and 27260 transitions. [2021-02-19 18:57:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:57:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 [2021-02-19 18:57:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:11,152 INFO L225 Difference]: With dead ends: 8137 [2021-02-19 18:57:11,152 INFO L226 Difference]: Without dead ends: 8111 [2021-02-19 18:57:11,153 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=572, Invalid=3460, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 18:57:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-02-19 18:57:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6333. [2021-02-19 18:57:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6333 states, 6332 states have (on average 3.4074542008843967) internal successors, (21576), 6332 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 21576 transitions. [2021-02-19 18:57:11,247 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 21576 transitions. Word has length 30 [2021-02-19 18:57:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:11,247 INFO L480 AbstractCegarLoop]: Abstraction has 6333 states and 21576 transitions. [2021-02-19 18:57:11,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-02-19 18:57:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 21576 transitions. [2021-02-19 18:57:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:11,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:11,254 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:11,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-02-19 18:57:11,455 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:11,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash 934593646, now seen corresponding path program 27 times [2021-02-19 18:57:11,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:11,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106634207] [2021-02-19 18:57:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:11,797 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:57:11,965 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:57:12,140 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:57:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:12,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106634207] [2021-02-19 18:57:12,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489619824] [2021-02-19 18:57:12,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:57:12,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:57:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:57:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:13,384 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-02-19 18:57:13,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-02-19 18:57:13,388 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:13,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:13,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:13,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-02-19 18:57:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:13,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:13,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-02-19 18:57:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350202042] [2021-02-19 18:57:13,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:57:13,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:13,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:57:13,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:57:13,455 INFO L87 Difference]: Start difference. First operand 6333 states and 21576 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) [2021-02-19 18:57:13,806 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 18:57:14,046 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 18:57:14,308 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 18:57:14,717 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-02-19 18:57:15,120 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 18:57:15,386 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-02-19 18:57:15,550 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-02-19 18:57:15,799 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 18:57:16,236 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-02-19 18:57:16,494 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 18:57:16,795 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 18:57:17,555 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 18:57:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:19,925 INFO L93 Difference]: Finished difference Result 7990 states and 26654 transitions. [2021-02-19 18:57:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:57:19,927 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 30 [2021-02-19 18:57:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:19,940 INFO L225 Difference]: With dead ends: 7990 [2021-02-19 18:57:19,940 INFO L226 Difference]: Without dead ends: 7964 [2021-02-19 18:57:19,940 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:57:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7964 states. [2021-02-19 18:57:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7964 to 6368. [2021-02-19 18:57:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 3.4053714465211247) internal successors, (21682), 6367 states have internal predecessors, (21682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 21682 transitions. [2021-02-19 18:57:20,029 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 21682 transitions. Word has length 30 [2021-02-19 18:57:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:20,029 INFO L480 AbstractCegarLoop]: Abstraction has 6368 states and 21682 transitions. [2021-02-19 18:57:20,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 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) [2021-02-19 18:57:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 21682 transitions. [2021-02-19 18:57:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:20,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:20,037 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:20,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-02-19 18:57:20,237 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1238817470, now seen corresponding path program 28 times [2021-02-19 18:57:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:20,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270995576] [2021-02-19 18:57:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:20,499 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:57:20,618 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:57:20,748 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:57:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:21,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270995576] [2021-02-19 18:57:21,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592844772] [2021-02-19 18:57:21,263 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 [2021-02-19 18:57:21,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:57:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:57:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:21,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:21,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:21,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:21,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 18:57:21,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:21,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-02-19 18:57:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:22,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:22,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-02-19 18:57:22,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387096944] [2021-02-19 18:57:22,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:57:22,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:57:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:57:22,008 INFO L87 Difference]: Start difference. First operand 6368 states and 21682 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-02-19 18:57:24,590 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-02-19 18:57:24,760 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-19 18:57:24,942 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-02-19 18:57:25,990 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-02-19 18:57:26,292 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 18:57:26,938 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 18:57:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:27,939 INFO L93 Difference]: Finished difference Result 7942 states and 26493 transitions. [2021-02-19 18:57:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:57:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 [2021-02-19 18:57:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:27,953 INFO L225 Difference]: With dead ends: 7942 [2021-02-19 18:57:27,953 INFO L226 Difference]: Without dead ends: 7916 [2021-02-19 18:57:27,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=521, Invalid=3139, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:57:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-02-19 18:57:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 6364. [2021-02-19 18:57:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6364 states, 6363 states have (on average 3.405940594059406) internal successors, (21672), 6363 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6364 states to 6364 states and 21672 transitions. [2021-02-19 18:57:28,041 INFO L78 Accepts]: Start accepts. Automaton has 6364 states and 21672 transitions. Word has length 30 [2021-02-19 18:57:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:28,041 INFO L480 AbstractCegarLoop]: Abstraction has 6364 states and 21672 transitions. [2021-02-19 18:57:28,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-02-19 18:57:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6364 states and 21672 transitions. [2021-02-19 18:57:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:28,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:28,049 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:28,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-02-19 18:57:28,250 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:28,250 INFO L82 PathProgramCache]: Analyzing trace with hash -169355551, now seen corresponding path program 45 times [2021-02-19 18:57:28,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:28,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858586483] [2021-02-19 18:57:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:28,533 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 18:57:28,665 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:57:28,789 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 18:57:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:29,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858586483] [2021-02-19 18:57:29,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681336053] [2021-02-19 18:57:29,268 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 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 [2021-02-19 18:57:29,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:57:29,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:57:29,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:29,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:29,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-02-19 18:57:29,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:57:29,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:29,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:29,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:274 [2021-02-19 18:57:30,321 WARN L202 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:57:31,024 WARN L202 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-02-19 18:57:31,384 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:57:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:31,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:31,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-02-19 18:57:31,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099666588] [2021-02-19 18:57:31,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:57:31,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:31,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:57:31,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:57:31,487 INFO L87 Difference]: Start difference. First operand 6364 states and 21672 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:57:32,225 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 18 [2021-02-19 18:57:32,538 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-02-19 18:57:32,933 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 20 [2021-02-19 18:57:33,247 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 18:57:34,147 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 18:57:36,105 WARN L202 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-02-19 18:57:36,505 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-02-19 18:57:37,703 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-02-19 18:57:38,547 WARN L202 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-02-19 18:57:39,226 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 23 [2021-02-19 18:57:39,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:39,512 INFO L93 Difference]: Finished difference Result 8888 states and 29620 transitions. [2021-02-19 18:57:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:57:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 [2021-02-19 18:57:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:39,527 INFO L225 Difference]: With dead ends: 8888 [2021-02-19 18:57:39,527 INFO L226 Difference]: Without dead ends: 8828 [2021-02-19 18:57:39,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:57:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8828 states. [2021-02-19 18:57:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8828 to 6370. [2021-02-19 18:57:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.4058721934369602) internal successors, (21692), 6369 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 21692 transitions. [2021-02-19 18:57:39,621 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 21692 transitions. Word has length 30 [2021-02-19 18:57:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:39,621 INFO L480 AbstractCegarLoop]: Abstraction has 6370 states and 21692 transitions. [2021-02-19 18:57:39,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:57:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 21692 transitions. [2021-02-19 18:57:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:39,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:39,628 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:39,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:39,829 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1905153295, now seen corresponding path program 46 times [2021-02-19 18:57:39,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:39,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67601667] [2021-02-19 18:57:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:40,082 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 18:57:40,229 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:57:40,374 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 18:57:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67601667] [2021-02-19 18:57:40,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464789510] [2021-02-19 18:57:40,793 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 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 [2021-02-19 18:57:40,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:57:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:57:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:41,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:41,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-02-19 18:57:41,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:41,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:41,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:41,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 18:57:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:41,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:41,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-02-19 18:57:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413985288] [2021-02-19 18:57:41,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:57:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:57:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:57:41,486 INFO L87 Difference]: Start difference. First operand 6370 states and 21692 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-02-19 18:57:42,066 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 18:57:42,716 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 18:57:42,958 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 18:57:43,207 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 18:57:43,769 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 18:57:44,050 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-02-19 18:57:44,294 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 18:57:44,451 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-19 18:57:44,855 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 18:57:45,090 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 18:57:45,336 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 18:57:45,697 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 18:57:45,978 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-02-19 18:57:46,264 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 18:57:46,588 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 18:57:47,227 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-02-19 18:57:47,406 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 18:57:48,328 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 18:57:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:48,555 INFO L93 Difference]: Finished difference Result 8709 states and 28890 transitions. [2021-02-19 18:57:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:57:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 [2021-02-19 18:57:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:48,571 INFO L225 Difference]: With dead ends: 8709 [2021-02-19 18:57:48,571 INFO L226 Difference]: Without dead ends: 8694 [2021-02-19 18:57:48,571 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=540, Invalid=2766, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:57:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-02-19 18:57:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 6392. [2021-02-19 18:57:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6392 states, 6391 states have (on average 3.407604443749022) internal successors, (21778), 6391 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6392 states to 6392 states and 21778 transitions. [2021-02-19 18:57:48,663 INFO L78 Accepts]: Start accepts. Automaton has 6392 states and 21778 transitions. Word has length 30 [2021-02-19 18:57:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:48,663 INFO L480 AbstractCegarLoop]: Abstraction has 6392 states and 21778 transitions. [2021-02-19 18:57:48,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-02-19 18:57:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6392 states and 21778 transitions. [2021-02-19 18:57:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:48,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:48,670 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:48,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-02-19 18:57:48,871 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash 828340038, now seen corresponding path program 29 times [2021-02-19 18:57:48,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:48,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469496166] [2021-02-19 18:57:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:49,181 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 18:57:49,318 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:57:49,468 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:57:49,614 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:57:49,778 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-02-19 18:57:49,949 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-02-19 18:57:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469496166] [2021-02-19 18:57:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201885033] [2021-02-19 18:57:50,217 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 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 [2021-02-19 18:57:50,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:57:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:57:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:50,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:50,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-02-19 18:57:50,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:51,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:51,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:51,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-02-19 18:57:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:51,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:51,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-02-19 18:57:51,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233766596] [2021-02-19 18:57:51,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:57:51,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:57:51,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:57:51,066 INFO L87 Difference]: Start difference. First operand 6392 states and 21778 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) [2021-02-19 18:57:51,837 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 18:57:52,061 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-02-19 18:57:52,512 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-02-19 18:57:52,964 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-02-19 18:57:53,180 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 18:57:53,492 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-02-19 18:57:53,733 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-02-19 18:57:54,056 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-02-19 18:57:54,253 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:57:54,549 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-02-19 18:57:54,921 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-02-19 18:57:55,187 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 18:57:55,600 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-02-19 18:57:55,902 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 18:57:56,166 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 18:57:56,382 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 18:57:56,742 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 18:57:57,374 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:57:57,736 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-02-19 18:57:58,046 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 18:57:58,916 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 18:57:59,454 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 18:57:59,807 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 18:58:00,004 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:58:00,286 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 18:58:00,574 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 18:58:01,261 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 18:58:01,616 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-19 18:58:01,844 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 18:58:02,069 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:58:02,309 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 18:58:03,199 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 18:58:03,380 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-02-19 18:58:03,625 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-02-19 18:58:03,986 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:58:04,659 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 18:58:04,849 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 18:58:05,371 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:58:05,580 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 18:58:05,811 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-02-19 18:58:06,513 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 18:58:06,761 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 18:58:07,100 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 18:58:07,421 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:58:07,787 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 18:58:08,016 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 18:58:08,252 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 18:58:08,873 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-02-19 18:58:09,211 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:58:09,639 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 18:58:09,872 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:58:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:10,060 INFO L93 Difference]: Finished difference Result 8788 states and 28904 transitions. [2021-02-19 18:58:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-02-19 18:58:10,063 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 30 [2021-02-19 18:58:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:10,077 INFO L225 Difference]: With dead ends: 8788 [2021-02-19 18:58:10,077 INFO L226 Difference]: Without dead ends: 8759 [2021-02-19 18:58:10,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1287, Invalid=10055, Unknown=0, NotChecked=0, Total=11342 [2021-02-19 18:58:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8759 states. [2021-02-19 18:58:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8759 to 6410. [2021-02-19 18:58:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6409 states have (on average 3.4067717272585427) internal successors, (21834), 6409 states have internal predecessors, (21834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 21834 transitions. [2021-02-19 18:58:10,175 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 21834 transitions. Word has length 30 [2021-02-19 18:58:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:10,175 INFO L480 AbstractCegarLoop]: Abstraction has 6410 states and 21834 transitions. [2021-02-19 18:58:10,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 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) [2021-02-19 18:58:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 21834 transitions. [2021-02-19 18:58:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:58:10,183 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:10,183 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:10,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-02-19 18:58:10,398 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash 696220077, now seen corresponding path program 47 times [2021-02-19 18:58:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:10,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321843036] [2021-02-19 18:58:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:10,753 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 18:58:10,932 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:58:11,107 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 18:58:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:11,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321843036] [2021-02-19 18:58:11,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158660457] [2021-02-19 18:58:11,559 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 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 [2021-02-19 18:58:11,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:58:11,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:58:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:12,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:12,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:12,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 18:58:12,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:12,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:12,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:12,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:13 [2021-02-19 18:58:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:12,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:12,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-02-19 18:58:12,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612062630] [2021-02-19 18:58:12,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:58:12,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:12,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:58:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:58:12,497 INFO L87 Difference]: Start difference. First operand 6410 states and 21834 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 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) [2021-02-19 18:58:12,821 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 18:58:13,164 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-02-19 18:58:13,347 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-02-19 18:58:13,703 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 18:58:13,943 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-02-19 18:58:14,325 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 18:58:14,602 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-02-19 18:58:14,795 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 18:58:15,169 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:58:15,787 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 18:58:16,167 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:58:16,418 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 18:58:16,849 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-02-19 18:58:17,109 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 18:58:17,408 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 18:58:17,801 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 18:58:18,067 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 18:58:18,329 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 18:58:18,509 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-02-19 18:58:18,781 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 18:58:19,073 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:58:19,476 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 18:58:19,997 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 18:58:20,272 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 18:58:20,712 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 18:58:20,984 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:58:21,345 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:58:21,483 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 18:58:21,877 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-02-19 18:58:22,300 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:58:22,627 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-02-19 18:58:23,002 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:58:23,158 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:58:23,450 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 18:58:23,932 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 18:58:24,287 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:58:24,474 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:58:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:25,066 INFO L93 Difference]: Finished difference Result 8884 states and 29405 transitions. [2021-02-19 18:58:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:58:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 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 30 [2021-02-19 18:58:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:25,085 INFO L225 Difference]: With dead ends: 8884 [2021-02-19 18:58:25,085 INFO L226 Difference]: Without dead ends: 8869 [2021-02-19 18:58:25,086 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=729, Invalid=4527, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:58:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2021-02-19 18:58:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 6431. [2021-02-19 18:58:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 3.4073094867807154) internal successors, (21909), 6430 states have internal predecessors, (21909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 21909 transitions. [2021-02-19 18:58:25,191 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 21909 transitions. Word has length 30 [2021-02-19 18:58:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:25,191 INFO L480 AbstractCegarLoop]: Abstraction has 6431 states and 21909 transitions. [2021-02-19 18:58:25,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 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) [2021-02-19 18:58:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 21909 transitions. [2021-02-19 18:58:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:58:25,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:25,199 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:25,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-02-19 18:58:25,400 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:25,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1793199083, now seen corresponding path program 48 times [2021-02-19 18:58:25,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:25,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986239593] [2021-02-19 18:58:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:25,792 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 18:58:25,973 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 18:58:26,152 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 18:58:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:26,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986239593] [2021-02-19 18:58:26,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301629808] [2021-02-19 18:58:26,598 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 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 [2021-02-19 18:58:26,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:58:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:58:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:27,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:27,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-02-19 18:58:27,078 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:27,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:27,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:27,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-02-19 18:58:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:27,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:27,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 18:58:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977126954] [2021-02-19 18:58:27,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:58:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:58:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:58:27,337 INFO L87 Difference]: Start difference. First operand 6431 states and 21909 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:58:27,978 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 18:58:28,206 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-02-19 18:58:28,468 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-02-19 18:58:28,750 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-02-19 18:58:28,932 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 18:58:29,308 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-02-19 18:58:29,581 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 18:58:29,772 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:58:30,444 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:58:30,735 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 18:58:30,967 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 18:58:31,412 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 18:58:31,712 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 18:58:32,006 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-02-19 18:58:32,259 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 18:58:32,555 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 18:58:32,927 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 18:58:33,314 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 18:58:33,648 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-02-19 18:58:34,012 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:58:34,318 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:58:34,785 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:58:35,248 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-02-19 18:58:35,714 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:58:36,030 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 18:58:36,528 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 18:58:36,983 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 18:58:37,362 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-02-19 18:58:37,593 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 18:58:38,083 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 18:58:38,408 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-02-19 18:58:38,753 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 18:58:38,984 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 18:58:39,337 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 18:58:39,749 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 18:58:39,908 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 18:58:40,486 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 18:58:40,850 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-02-19 18:58:41,541 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 18:58:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:42,561 INFO L93 Difference]: Finished difference Result 9221 states and 30667 transitions. [2021-02-19 18:58:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:58:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-02-19 18:58:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:42,580 INFO L225 Difference]: With dead ends: 9221 [2021-02-19 18:58:42,581 INFO L226 Difference]: Without dead ends: 9196 [2021-02-19 18:58:42,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=835, Invalid=5485, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:58:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-02-19 18:58:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 6404. [2021-02-19 18:58:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 6403 states have (on average 3.406996720287365) internal successors, (21815), 6403 states have internal predecessors, (21815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 21815 transitions. [2021-02-19 18:58:42,716 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 21815 transitions. Word has length 30 [2021-02-19 18:58:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:42,716 INFO L480 AbstractCegarLoop]: Abstraction has 6404 states and 21815 transitions. [2021-02-19 18:58:42,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:58:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 21815 transitions. [2021-02-19 18:58:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:58:42,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:42,725 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:42,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:42,925 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1033489000, now seen corresponding path program 30 times [2021-02-19 18:58:42,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:42,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363939844] [2021-02-19 18:58:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:43,210 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-02-19 18:58:43,684 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-02-19 18:58:43,838 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 18:58:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:44,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363939844] [2021-02-19 18:58:44,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943858179] [2021-02-19 18:58:44,178 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 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 [2021-02-19 18:58:44,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:58:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:58:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:45,217 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 18:58:45,218 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-02-19 18:58:45,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 79 [2021-02-19 18:58:45,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 9 xjuncts. [2021-02-19 18:58:46,853 WARN L202 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2021-02-19 18:58:46,854 INFO L628 ElimStorePlain]: treesize reduction 1537, result has 10.8 percent of original size [2021-02-19 18:58:46,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:46,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:510 [2021-02-19 18:58:47,446 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-02-19 18:58:47,886 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-02-19 18:58:48,140 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-02-19 18:58:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:48,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:48,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-02-19 18:58:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473121650] [2021-02-19 18:58:48,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:58:48,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:58:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:58:48,232 INFO L87 Difference]: Start difference. First operand 6404 states and 21815 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) [2021-02-19 18:58:48,738 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-02-19 18:58:48,934 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-02-19 18:58:49,192 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:58:49,762 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-02-19 18:58:49,973 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:58:50,357 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-02-19 18:58:50,905 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-02-19 18:58:51,221 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2021-02-19 18:58:51,536 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 18:58:51,889 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:58:52,216 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 18:58:52,788 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 18:58:53,083 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 18:58:53,410 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 18:58:54,226 WARN L202 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-02-19 18:58:54,525 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 18:58:54,869 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 18:58:55,183 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 18:58:55,558 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 18:58:55,948 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-02-19 18:58:56,571 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-02-19 18:58:57,474 WARN L202 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-02-19 18:58:57,742 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 18:58:58,221 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 18:58:58,521 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 18:58:59,331 WARN L202 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-02-19 18:58:59,841 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-02-19 18:59:00,226 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:59:00,973 WARN L202 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-02-19 18:59:01,430 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 18:59:01,969 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:59:02,536 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-02-19 18:59:03,137 WARN L202 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-02-19 18:59:03,486 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:59:03,825 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-02-19 18:59:04,162 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 18:59:04,425 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 18:59:05,539 WARN L202 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2021-02-19 18:59:06,023 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-02-19 18:59:06,363 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 18:59:06,798 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2021-02-19 18:59:07,603 WARN L202 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-02-19 18:59:07,930 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-02-19 18:59:08,386 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-02-19 18:59:08,815 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 48 [2021-02-19 18:59:09,580 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-02-19 18:59:09,986 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 18:59:10,386 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-02-19 18:59:11,553 WARN L202 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-02-19 18:59:13,156 WARN L202 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-02-19 18:59:13,875 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 18:59:14,564 WARN L202 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 18:59:15,137 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:59:15,695 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 18:59:16,227 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 18:59:16,977 WARN L202 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-02-19 18:59:18,059 WARN L202 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2021-02-19 18:59:18,710 WARN L202 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-02-19 18:59:19,230 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-02-19 18:59:19,771 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 18:59:20,425 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-02-19 18:59:21,262 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 18:59:21,563 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 20 [2021-02-19 18:59:21,802 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 18 [2021-02-19 18:59:22,489 WARN L202 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-02-19 18:59:22,878 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-19 18:59:23,254 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-02-19 18:59:23,689 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2021-02-19 18:59:24,039 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 21 [2021-02-19 18:59:24,518 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 18:59:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:24,608 INFO L93 Difference]: Finished difference Result 10289 states and 33697 transitions. [2021-02-19 18:59:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-02-19 18:59:24,611 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 [2021-02-19 18:59:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:24,628 INFO L225 Difference]: With dead ends: 10289 [2021-02-19 18:59:24,628 INFO L226 Difference]: Without dead ends: 10241 [2021-02-19 18:59:24,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4025 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=1576, Invalid=10856, Unknown=0, NotChecked=0, Total=12432 [2021-02-19 18:59:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-02-19 18:59:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6449. [2021-02-19 18:59:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 6448 states have (on average 3.4069478908188584) internal successors, (21968), 6448 states have internal predecessors, (21968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 21968 transitions. [2021-02-19 18:59:24,747 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 21968 transitions. Word has length 30 [2021-02-19 18:59:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:24,747 INFO L480 AbstractCegarLoop]: Abstraction has 6449 states and 21968 transitions. [2021-02-19 18:59:24,747 INFO L481 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) [2021-02-19 18:59:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 21968 transitions. [2021-02-19 18:59:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:59:24,756 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:24,756 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:24,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-02-19 18:59:24,956 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1682271128, now seen corresponding path program 31 times [2021-02-19 18:59:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440686052] [2021-02-19 18:59:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:25,252 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-02-19 18:59:25,504 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 18:59:25,784 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-02-19 18:59:25,949 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 18:59:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440686052] [2021-02-19 18:59:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763094884] [2021-02-19 18:59:26,331 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 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 [2021-02-19 18:59:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:26,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:59:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:27,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:27,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:27,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:27,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-02-19 18:59:27,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:59:27,183 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-02-19 18:59:27,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:27,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-02-19 18:59:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:27,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:27,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-02-19 18:59:27,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334983115] [2021-02-19 18:59:27,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:59:27,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:59:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:59:27,415 INFO L87 Difference]: Start difference. First operand 6449 states and 21968 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-02-19 18:59:27,743 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 18:59:27,926 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-02-19 18:59:28,571 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 18:59:28,910 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-02-19 18:59:29,419 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 18:59:29,706 WARN L202 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-02-19 18:59:30,363 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:59:30,959 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:59:31,374 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 18:59:31,518 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-02-19 18:59:32,103 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 18:59:32,864 WARN L202 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 18:59:33,095 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 18:59:33,567 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-02-19 18:59:34,152 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 18:59:34,456 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-02-19 18:59:34,695 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 18:59:35,286 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-02-19 18:59:35,765 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:59:36,103 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:59:36,740 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 18:59:37,131 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 18:59:37,565 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 18:59:38,168 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:59:38,566 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 18:59:38,783 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 18:59:39,178 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 18:59:39,981 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 18:59:40,505 WARN L202 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-02-19 18:59:41,221 WARN L202 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-02-19 18:59:41,702 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 18:59:42,356 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 18:59:43,149 WARN L202 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-02-19 18:59:43,424 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:59:44,155 WARN L202 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-02-19 18:59:44,626 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-02-19 18:59:44,976 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 18:59:45,499 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 18:59:46,228 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 18:59:46,887 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 18:59:47,165 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 18:59:47,374 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 18:59:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:48,055 INFO L93 Difference]: Finished difference Result 11843 states and 38721 transitions. [2021-02-19 18:59:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 18:59:48,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 30 [2021-02-19 18:59:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:48,081 INFO L225 Difference]: With dead ends: 11843 [2021-02-19 18:59:48,081 INFO L226 Difference]: Without dead ends: 11786 [2021-02-19 18:59:48,082 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1317, Invalid=7239, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 18:59:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11786 states. [2021-02-19 18:59:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11786 to 6620. [2021-02-19 18:59:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.4116936093065418) internal successors, (22582), 6619 states have internal predecessors, (22582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 22582 transitions. [2021-02-19 18:59:48,213 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 22582 transitions. Word has length 30 [2021-02-19 18:59:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:48,213 INFO L480 AbstractCegarLoop]: Abstraction has 6620 states and 22582 transitions. [2021-02-19 18:59:48,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-02-19 18:59:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 22582 transitions. [2021-02-19 18:59:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:59:48,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:48,221 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:48,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:48,422 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:48,422 INFO L82 PathProgramCache]: Analyzing trace with hash 33349048, now seen corresponding path program 32 times [2021-02-19 18:59:48,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:48,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755238324] [2021-02-19 18:59:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:48,737 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-02-19 18:59:48,863 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-02-19 18:59:49,000 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 18:59:49,131 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-02-19 18:59:49,293 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-02-19 18:59:49,468 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-02-19 18:59:49,677 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 18:59:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:50,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755238324] [2021-02-19 18:59:50,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524870184] [2021-02-19 18:59:50,068 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 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 [2021-02-19 18:59:50,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:59:50,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:59:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:51,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:51,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-02-19 18:59:51,119 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:59:51,195 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-02-19 18:59:51,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:51,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-02-19 18:59:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:51,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:51,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-02-19 18:59:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176558487] [2021-02-19 18:59:51,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:59:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:59:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:59:51,460 INFO L87 Difference]: Start difference. First operand 6620 states and 22582 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-02-19 18:59:51,810 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-02-19 18:59:52,047 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-02-19 18:59:52,611 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-02-19 18:59:52,889 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:59:53,257 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-02-19 18:59:53,796 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-02-19 18:59:54,102 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 18:59:55,035 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 18:59:55,577 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 18:59:55,764 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 18:59:56,406 WARN L202 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-02-19 18:59:56,713 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:59:57,054 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:59:57,404 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 18:59:57,930 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 18:59:58,523 WARN L202 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-02-19 18:59:59,185 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-02-19 18:59:59,545 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-02-19 18:59:59,977 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-02-19 19:00:00,354 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-02-19 19:00:00,762 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 Received shutdown request... [2021-02-19 19:00:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:00:01,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-02-19 19:00:01,045 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:00:01,049 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:00:01,049 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:00:01 BasicIcfg [2021-02-19 19:00:01,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:00:01,050 INFO L168 Benchmark]: Toolchain (without parser) took 528176.24 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 876.6 MB). Free memory was 236.5 MB in the beginning and 757.3 MB in the end (delta: -520.8 MB). Peak memory consumption was 356.3 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:01,050 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:00:01,050 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:00:01,050 INFO L168 Benchmark]: Boogie Preprocessor took 17.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 978.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:01,050 INFO L168 Benchmark]: RCFGBuilder took 290.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:01,050 INFO L168 Benchmark]: TraceAbstraction took 527833.74 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 876.6 MB). Free memory was 237.8 MB in the beginning and 757.3 MB in the end (delta: -519.5 MB). Peak memory consumption was 356.9 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:01,051 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 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 978.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 290.14 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 527833.74 ms. Allocated memory was 255.9 MB in the beginning and 1.1 GB in the end (delta: 876.6 MB). Free memory was 237.8 MB in the beginning and 757.3 MB in the end (delta: -519.5 MB). Peak memory consumption was 356.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 58). Cancelled while BasicCegarLoop was constructing difference of abstraction (6620states) and FLOYD_HOARE automaton (currently 34 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (332 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 527.7s, OverallIterations: 125, TraceHistogramMax: 2, AutomataDifference: 404.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6974 SDtfs, 35943 SDslu, 61809 SDs, 0 SdLazy, 123899 SolverSat, 7205 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8084 GetRequests, 2519 SyntacticMatches, 148 SemanticMatches, 5417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105226 ImplicationChecksByTransitivity, 332.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6620occurred in iteration=124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.5s AutomataMinimizationTime, 124 MinimizatonAttempts, 250764 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 85.8s InterpolantComputationTime, 6747 NumberOfCodeBlocks, 6744 NumberOfCodeBlocksAsserted, 382 NumberOfCheckSat, 6505 ConstructedInterpolants, 75 QuantifiedInterpolants, 2357026 SizeOfPredicates, 638 NumberOfNonLiveVariables, 7352 ConjunctsInSsa, 1927 ConjunctsInUnsatCore, 242 InterpolantComputations, 8 PerfectInterpolantSequences, 198/1499 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