/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 14:25:27,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 14:25:27,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 14:25:27,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 14:25:27,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-23 14:25:27,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 14:25:27,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 14:25:27,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 14:25:27,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 14:25:27,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 14:25:27,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 14:25:27,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 14:25:27,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 14:25:27,807 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 14:25:27,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 14:25:27,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 14:25:27,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 14:25:27,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 14:25:27,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 14:25:27,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 14:25:27,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 14:25:27,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 14:25:27,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 14:25:27,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 14:25:27,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 14:25:27,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 14:25:27,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 14:25:27,810 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 14:25:27,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 14:25:27,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 14:25:27,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 14:25:28,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 14:25:28,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 14:25:28,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 14:25:28,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 14:25:28,049 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 14:25:28,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-02-23 14:25:28,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9e369d7/08bb248e02cd40b39ed7cd3bac2b5dc6/FLAG8547ebb4e [2022-02-23 14:25:28,459 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 14:25:28,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-02-23 14:25:28,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9e369d7/08bb248e02cd40b39ed7cd3bac2b5dc6/FLAG8547ebb4e [2022-02-23 14:25:28,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9e369d7/08bb248e02cd40b39ed7cd3bac2b5dc6 [2022-02-23 14:25:28,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 14:25:28,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 14:25:28,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 14:25:28,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 14:25:28,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 14:25:28,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d82f0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28, skipping insertion in model container [2022-02-23 14:25:28,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 14:25:28,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 14:25:28,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c[537,550] [2022-02-23 14:25:28,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 14:25:28,637 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 14:25:28,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c[537,550] [2022-02-23 14:25:28,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 14:25:28,660 INFO L208 MainTranslator]: Completed translation [2022-02-23 14:25:28,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28 WrapperNode [2022-02-23 14:25:28,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 14:25:28,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 14:25:28,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 14:25:28,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 14:25:28,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 14:25:28,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 14:25:28,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 14:25:28,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 14:25:28,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (1/1) ... [2022-02-23 14:25:28,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 14:25:28,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:28,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 14:25:28,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 14:25:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 14:25:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 14:25:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 14:25:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 14:25:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 14:25:28,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 14:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 14:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 14:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 14:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 14:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 14:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 14:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 14:25:28,790 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 14:25:28,792 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 14:25:28,876 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 14:25:28,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 14:25:28,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 14:25:28,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:25:28 BoogieIcfgContainer [2022-02-23 14:25:28,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 14:25:28,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 14:25:28,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 14:25:28,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 14:25:28,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:25:28" (1/3) ... [2022-02-23 14:25:28,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b813542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:25:28, skipping insertion in model container [2022-02-23 14:25:28,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:25:28" (2/3) ... [2022-02-23 14:25:28,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b813542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:25:28, skipping insertion in model container [2022-02-23 14:25:28,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:25:28" (3/3) ... [2022-02-23 14:25:28,899 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2022-02-23 14:25:28,902 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 14:25:28,902 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 14:25:28,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 14:25:28,974 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 14:25:28,974 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 14:25:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 14:25:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 14:25:28,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:28,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:28,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-02-23 14:25:29,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:29,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622877797] [2022-02-23 14:25:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 14:25:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 14:25:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:29,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:29,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622877797] [2022-02-23 14:25:29,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622877797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:25:29,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:25:29,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 14:25:29,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724162631] [2022-02-23 14:25:29,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:25:29,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 14:25:29,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 14:25:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 14:25:29,176 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 14:25:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:29,232 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 14:25:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 14:25:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 14:25:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:29,240 INFO L225 Difference]: With dead ends: 52 [2022-02-23 14:25:29,241 INFO L226 Difference]: Without dead ends: 26 [2022-02-23 14:25:29,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 14:25:29,246 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:29,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:25:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-23 14:25:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-23 14:25:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 14:25:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-23 14:25:29,277 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-02-23 14:25:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:29,278 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-23 14:25:29,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 14:25:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-23 14:25:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 14:25:29,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:29,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:29,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 14:25:29,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:29,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-02-23 14:25:29,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:29,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304559093] [2022-02-23 14:25:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:29,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:29,299 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:29,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178251048] [2022-02-23 14:25:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:29,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:29,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:29,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 14:25:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:29,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 14:25:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:29,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:25:29,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:29,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304559093] [2022-02-23 14:25:29,447 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:29,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178251048] [2022-02-23 14:25:29,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178251048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:25:29,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:25:29,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 14:25:29,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194725256] [2022-02-23 14:25:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:25:29,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 14:25:29,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 14:25:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 14:25:29,451 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 14:25:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:29,466 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-23 14:25:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 14:25:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 14:25:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:29,467 INFO L225 Difference]: With dead ends: 34 [2022-02-23 14:25:29,467 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 14:25:29,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 14:25:29,469 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:29,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:25:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 14:25:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-23 14:25:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 14:25:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-23 14:25:29,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-02-23 14:25:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:29,476 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-23 14:25:29,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 14:25:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-23 14:25:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 14:25:29,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:29,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:29,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:29,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:29,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-02-23 14:25:29,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:29,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519173973] [2022-02-23 14:25:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:29,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:29,701 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:29,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160246026] [2022-02-23 14:25:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:29,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:29,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:29,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 14:25:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 14:25:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:29,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:25:29,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:29,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519173973] [2022-02-23 14:25:29,874 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:29,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160246026] [2022-02-23 14:25:29,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160246026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:25:29,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:25:29,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 14:25:29,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819213219] [2022-02-23 14:25:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:25:29,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 14:25:29,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 14:25:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 14:25:29,876 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 14:25:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:29,916 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-02-23 14:25:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 14:25:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 14:25:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:29,918 INFO L225 Difference]: With dead ends: 38 [2022-02-23 14:25:29,918 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 14:25:29,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 14:25:29,919 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:29,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:25:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 14:25:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-02-23 14:25:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 14:25:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-23 14:25:29,927 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-02-23 14:25:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:29,928 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-23 14:25:29,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 14:25:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-23 14:25:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 14:25:29,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:29,929 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:29,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:30,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 14:25:30,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-02-23 14:25:30,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:30,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124082030] [2022-02-23 14:25:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:30,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:30,159 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:30,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443839199] [2022-02-23 14:25:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:30,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:30,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:30,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:30,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 14:25:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:30,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 14:25:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:30,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:25:30,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:30,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124082030] [2022-02-23 14:25:30,314 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:30,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443839199] [2022-02-23 14:25:30,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443839199] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:25:30,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:25:30,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 14:25:30,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388549131] [2022-02-23 14:25:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:25:30,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 14:25:30,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 14:25:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 14:25:30,319 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 14:25:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:30,379 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-23 14:25:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 14:25:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-23 14:25:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:30,381 INFO L225 Difference]: With dead ends: 42 [2022-02-23 14:25:30,382 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 14:25:30,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 14:25:30,383 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:30,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:25:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 14:25:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-02-23 14:25:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 14:25:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-23 14:25:30,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-02-23 14:25:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:30,392 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-23 14:25:30,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 14:25:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-23 14:25:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 14:25:30,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:30,393 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 14:25:30,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:30,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:30,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-02-23 14:25:30,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:30,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310045263] [2022-02-23 14:25:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:30,608 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:30,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078586000] [2022-02-23 14:25:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:30,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:30,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 14:25:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 14:25:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:30,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:25:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:30,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:30,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310045263] [2022-02-23 14:25:30,852 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:30,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078586000] [2022-02-23 14:25:30,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078586000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:25:30,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:25:30,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 14:25:30,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220713974] [2022-02-23 14:25:30,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:25:30,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 14:25:30,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 14:25:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 14:25:30,854 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 14:25:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:30,911 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-02-23 14:25:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 14:25:30,912 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), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-02-23 14:25:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:30,913 INFO L225 Difference]: With dead ends: 70 [2022-02-23 14:25:30,913 INFO L226 Difference]: Without dead ends: 63 [2022-02-23 14:25:30,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 14:25:30,914 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:30,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:25:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-23 14:25:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-02-23 14:25:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 14:25:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-02-23 14:25:30,923 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-02-23 14:25:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:30,923 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-02-23 14:25:30,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 14:25:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-02-23 14:25:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 14:25:30,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:30,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:30,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:31,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-02-23 14:25:31,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:31,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458996759] [2022-02-23 14:25:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:31,158 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:31,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633984851] [2022-02-23 14:25:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:31,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:31,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:31,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 14:25:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 14:25:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:25:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:32,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:32,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458996759] [2022-02-23 14:25:32,947 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:32,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633984851] [2022-02-23 14:25:32,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633984851] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:25:32,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:25:32,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-02-23 14:25:32,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650848668] [2022-02-23 14:25:32,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:25:32,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 14:25:32,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 14:25:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-23 14:25:32,949 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 14:25:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:33,876 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2022-02-23 14:25:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 14:25:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-02-23 14:25:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:33,887 INFO L225 Difference]: With dead ends: 103 [2022-02-23 14:25:33,887 INFO L226 Difference]: Without dead ends: 94 [2022-02-23 14:25:33,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-23 14:25:33,888 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:33,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 241 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 14:25:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-23 14:25:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-02-23 14:25:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 73 states have internal predecessors, (83), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 14:25:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-02-23 14:25:33,915 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 28 [2022-02-23 14:25:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:33,916 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-02-23 14:25:33,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 14:25:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-02-23 14:25:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 14:25:33,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:33,918 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:33,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:34,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:34,141 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-02-23 14:25:34,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:34,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33990381] [2022-02-23 14:25:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:34,152 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:34,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098568886] [2022-02-23 14:25:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:34,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:34,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:34,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 14:25:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 14:25:34,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 14:25:34,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:25:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 14:25:34,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:34,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33990381] [2022-02-23 14:25:34,393 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:34,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098568886] [2022-02-23 14:25:34,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098568886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:25:34,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:25:34,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 14:25:34,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845484357] [2022-02-23 14:25:34,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:25:34,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 14:25:34,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 14:25:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 14:25:34,396 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 14:25:36,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 14:25:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:36,485 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-02-23 14:25:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 14:25:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-23 14:25:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:36,486 INFO L225 Difference]: With dead ends: 104 [2022-02-23 14:25:36,487 INFO L226 Difference]: Without dead ends: 89 [2022-02-23 14:25:36,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-23 14:25:36,487 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:36,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-02-23 14:25:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-23 14:25:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-02-23 14:25:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 14:25:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-02-23 14:25:36,496 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 34 [2022-02-23 14:25:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:36,496 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-02-23 14:25:36,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 14:25:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-02-23 14:25:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 14:25:36,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:36,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:36,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:36,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:36,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:36,712 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 1 times [2022-02-23 14:25:36,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:36,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284827590] [2022-02-23 14:25:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:36,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:36,721 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:36,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258715210] [2022-02-23 14:25:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:36,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:36,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:36,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:36,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 14:25:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:25:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-23 14:25:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 14:25:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:25:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 14:25:44,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:44,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284827590] [2022-02-23 14:25:44,290 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:44,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258715210] [2022-02-23 14:25:44,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258715210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:25:44,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:25:44,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-02-23 14:25:44,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261539493] [2022-02-23 14:25:44,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:25:44,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 14:25:44,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 14:25:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-23 14:25:44,292 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-23 14:25:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:48,078 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2022-02-23 14:25:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 14:25:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-02-23 14:25:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:48,080 INFO L225 Difference]: With dead ends: 124 [2022-02-23 14:25:48,080 INFO L226 Difference]: Without dead ends: 122 [2022-02-23 14:25:48,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-02-23 14:25:48,081 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:48,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 336 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 22 Unchecked, 0.8s Time] [2022-02-23 14:25:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-23 14:25:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-02-23 14:25:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 14:25:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-02-23 14:25:48,097 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 38 [2022-02-23 14:25:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:48,097 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-02-23 14:25:48,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-23 14:25:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-02-23 14:25:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 14:25:48,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:48,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:48,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 14:25:48,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:48,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -921054650, now seen corresponding path program 2 times [2022-02-23 14:25:48,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:48,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956887708] [2022-02-23 14:25:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:48,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:48,317 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:48,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809529050] [2022-02-23 14:25:48,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 14:25:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:48,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:48,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 14:25:48,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 14:25:48,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 14:25:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 14:25:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:25:48,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:25:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 14:25:48,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:25:48,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956887708] [2022-02-23 14:25:48,706 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:25:48,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809529050] [2022-02-23 14:25:48,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809529050] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:25:48,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:25:48,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 14:25:48,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027982322] [2022-02-23 14:25:48,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:25:48,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 14:25:48,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:25:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 14:25:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 14:25:48,708 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 14:25:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:25:48,868 INFO L93 Difference]: Finished difference Result 300 states and 341 transitions. [2022-02-23 14:25:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 14:25:48,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-02-23 14:25:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:25:48,870 INFO L225 Difference]: With dead ends: 300 [2022-02-23 14:25:48,870 INFO L226 Difference]: Without dead ends: 293 [2022-02-23 14:25:48,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 14:25:48,872 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 14:25:48,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 162 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 14:25:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-23 14:25:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2022-02-23 14:25:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 230 states have internal predecessors, (250), 32 states have call successors, (32), 30 states have call predecessors, (32), 29 states have return successors, (30), 22 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-23 14:25:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2022-02-23 14:25:48,897 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 58 [2022-02-23 14:25:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:25:48,897 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2022-02-23 14:25:48,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 14:25:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2022-02-23 14:25:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 14:25:48,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:25:48,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:25:48,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 14:25:49,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 14:25:49,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:25:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:25:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash -919267190, now seen corresponding path program 2 times [2022-02-23 14:25:49,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:25:49,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107415101] [2022-02-23 14:25:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:25:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:25:49,135 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:25:49,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220705383] [2022-02-23 14:25:49,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 14:25:49,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:25:49,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:25:49,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 14:25:49,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 14:25:49,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 14:25:49,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 14:25:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-23 14:25:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:25:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 14:25:56,449 INFO L328 TraceCheckSpWp]: Computing backward predicates...