/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/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 18:27:13,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 18:27:13,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 18:27:13,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 18:27:13,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 18:27:13,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 18:27:13,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 18:27:13,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 18:27:13,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 18:27:13,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 18:27:13,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 18:27:13,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 18:27:13,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 18:27:13,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 18:27:13,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 18:27:13,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 18:27:13,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 18:27:13,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 18:27:13,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 18:27:13,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 18:27:13,493 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 [2022-02-14 18:27:13,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 18:27:13,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 18:27:13,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 18:27:13,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 18:27:13,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 18:27:13,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 18:27:13,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 18:27:13,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 18:27:13,509 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 18:27:13,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 18:27:13,509 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 18:27:13,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 18:27:13,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 18:27:13,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 18:27:13,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 18:27:13,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 18:27:13,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 18:27:13,512 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 18:27:13,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 18:27:13,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 18:27:13,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 18:27:13,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 18:27:13,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 18:27:13,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 18:27:13,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 18:27:13,734 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 18:27:13,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-02-14 18:27:13,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9497979c6/9a2086a93ae84bf684c5525a6c32f583/FLAGa31828897 [2022-02-14 18:27:14,156 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 18:27:14,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-02-14 18:27:14,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9497979c6/9a2086a93ae84bf684c5525a6c32f583/FLAGa31828897 [2022-02-14 18:27:14,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9497979c6/9a2086a93ae84bf684c5525a6c32f583 [2022-02-14 18:27:14,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 18:27:14,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 18:27:14,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 18:27:14,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 18:27:14,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 18:27:14,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cc4643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14, skipping insertion in model container [2022-02-14 18:27:14,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 18:27:14,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 18:27:14,386 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/hard-u_valuebound20.c[537,550] [2022-02-14 18:27:14,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 18:27:14,416 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 18:27:14,427 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/hard-u_valuebound20.c[537,550] [2022-02-14 18:27:14,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 18:27:14,450 INFO L208 MainTranslator]: Completed translation [2022-02-14 18:27:14,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14 WrapperNode [2022-02-14 18:27:14,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 18:27:14,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 18:27:14,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 18:27:14,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 18:27:14,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 18:27:14,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 18:27:14,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 18:27:14,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 18:27:14,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (1/1) ... [2022-02-14 18:27:14,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 18:27:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:27:14,534 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) [2022-02-14 18:27:14,537 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 [2022-02-14 18:27:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 18:27:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 18:27:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 18:27:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 18:27:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 18:27:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 18:27:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 18:27:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 18:27:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 18:27:14,606 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 18:27:14,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 18:27:14,760 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 18:27:14,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 18:27:14,765 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 18:27:14,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 06:27:14 BoogieIcfgContainer [2022-02-14 18:27:14,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 18:27:14,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 18:27:14,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 18:27:14,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 18:27:14,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 06:27:14" (1/3) ... [2022-02-14 18:27:14,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fe85e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 06:27:14, skipping insertion in model container [2022-02-14 18:27:14,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:27:14" (2/3) ... [2022-02-14 18:27:14,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fe85e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 06:27:14, skipping insertion in model container [2022-02-14 18:27:14,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 06:27:14" (3/3) ... [2022-02-14 18:27:14,788 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2022-02-14 18:27:14,791 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 18:27:14,791 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 18:27:14,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 18:27:14,845 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 [2022-02-14 18:27:14,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 18:27:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 18:27:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 18:27:14,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:14,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:27:14,865 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-02-14 18:27:14,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:14,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185741837] [2022-02-14 18:27:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 18:27:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 18:27:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 18:27:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 18:27:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:27:15,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:15,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185741837] [2022-02-14 18:27:15,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185741837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:27:15,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:27:15,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 18:27:15,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272959223] [2022-02-14 18:27:15,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:27:15,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 18:27:15,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:15,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 18:27:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 18:27:15,123 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 18:27:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:15,218 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-02-14 18:27:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 18:27:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 18:27:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:15,225 INFO L225 Difference]: With dead ends: 69 [2022-02-14 18:27:15,225 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 18:27:15,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 18:27:15,235 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:15,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:27:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 18:27:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 18:27:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 18:27:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-14 18:27:15,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-02-14 18:27:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:15,282 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-14 18:27:15,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 18:27:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-14 18:27:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 18:27:15,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:15,284 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:27:15,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 18:27:15,285 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-02-14 18:27:15,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:15,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962650907] [2022-02-14 18:27:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:15,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 18:27:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 18:27:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 18:27:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 18:27:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:27:15,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:15,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962650907] [2022-02-14 18:27:15,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962650907] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:27:15,368 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:27:15,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 18:27:15,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892167717] [2022-02-14 18:27:15,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:27:15,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:27:15,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:27:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:27:15,370 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 18:27:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:15,535 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-14 18:27:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 18:27:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-14 18:27:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:15,536 INFO L225 Difference]: With dead ends: 46 [2022-02-14 18:27:15,536 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 18:27:15,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 18:27:15,543 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:15,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:27:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 18:27:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-14 18:27:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 18:27:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-14 18:27:15,551 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-02-14 18:27:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:15,551 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-14 18:27:15,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 18:27:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-14 18:27:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 18:27:15,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:15,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:27:15,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 18:27:15,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-02-14 18:27:15,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:15,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31930228] [2022-02-14 18:27:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:15,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 18:27:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 18:27:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 18:27:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 18:27:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 18:27:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 18:27:15,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:15,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31930228] [2022-02-14 18:27:15,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31930228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:27:15,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:27:15,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 18:27:15,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761126628] [2022-02-14 18:27:15,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:27:15,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:27:15,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:15,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:27:15,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:27:15,713 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 18:27:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:15,848 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-02-14 18:27:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 18:27:15,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-14 18:27:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:15,849 INFO L225 Difference]: With dead ends: 50 [2022-02-14 18:27:15,849 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 18:27:15,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 18:27:15,851 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:15,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:27:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 18:27:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-14 18:27:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 18:27:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-02-14 18:27:15,856 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-02-14 18:27:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:15,856 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-02-14 18:27:15,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 18:27:15,857 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-02-14 18:27:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 18:27:15,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:15,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:27:15,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 18:27:15,858 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-02-14 18:27:15,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:15,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569209067] [2022-02-14 18:27:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:15,868 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:27:15,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096313641] [2022-02-14 18:27:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:15,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:27:15,870 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) [2022-02-14 18:27:15,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 18:27:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:15,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 18:27:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:27:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 18:27:16,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:27:16,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:16,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569209067] [2022-02-14 18:27:16,040 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:27:16,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096313641] [2022-02-14 18:27:16,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096313641] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:27:16,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:27:16,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 18:27:16,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247326927] [2022-02-14 18:27:16,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:27:16,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 18:27:16,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 18:27:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 18:27:16,042 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-14 18:27:18,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 18:27:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:18,264 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-02-14 18:27:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:27:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-02-14 18:27:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:18,265 INFO L225 Difference]: With dead ends: 58 [2022-02-14 18:27:18,265 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 18:27:18,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 18:27:18,266 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:18,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-14 18:27:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 18:27:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-14 18:27:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 18:27:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-02-14 18:27:18,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-02-14 18:27:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:18,274 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-02-14 18:27:18,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-14 18:27:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-02-14 18:27:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 18:27:18,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:18,275 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:27:18,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 18:27:18,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:18,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-02-14 18:27:18,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:18,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915283225] [2022-02-14 18:27:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:18,489 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:27:18,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152668750] [2022-02-14 18:27:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:27:18,506 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) [2022-02-14 18:27:18,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 18:27:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 18:27:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:27:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 18:27:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:27:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 18:27:19,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:19,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915283225] [2022-02-14 18:27:19,080 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:27:19,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152668750] [2022-02-14 18:27:19,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152668750] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 18:27:19,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 18:27:19,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 18:27:19,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769760462] [2022-02-14 18:27:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:27:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:27:19,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:27:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 18:27:19,082 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 18:27:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:19,171 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-02-14 18:27:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:27:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-02-14 18:27:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:19,172 INFO L225 Difference]: With dead ends: 68 [2022-02-14 18:27:19,172 INFO L226 Difference]: Without dead ends: 66 [2022-02-14 18:27:19,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 18:27:19,173 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:19,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:27:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-14 18:27:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-02-14 18:27:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 18:27:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-02-14 18:27:19,183 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-02-14 18:27:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:19,184 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-02-14 18:27:19,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 18:27:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-02-14 18:27:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 18:27:19,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:19,185 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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] [2022-02-14 18:27:19,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 18:27:19,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:19,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-02-14 18:27:19,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:19,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941273176] [2022-02-14 18:27:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:19,438 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:27:19,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721216908] [2022-02-14 18:27:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:19,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:27:19,440 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) [2022-02-14 18:27:19,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 18:27:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-14 18:27:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:27:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 18:27:20,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:27:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 18:27:20,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:20,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941273176] [2022-02-14 18:27:20,860 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:27:20,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721216908] [2022-02-14 18:27:20,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721216908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:27:20,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:27:20,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-02-14 18:27:20,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346237607] [2022-02-14 18:27:20,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:27:20,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 18:27:20,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 18:27:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-14 18:27:20,862 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-14 18:27:24,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 18:27:27,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 18:27:29,558 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 [] [2022-02-14 18:27:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:31,157 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2022-02-14 18:27:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 18:27:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 55 [2022-02-14 18:27:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:31,159 INFO L225 Difference]: With dead ends: 95 [2022-02-14 18:27:31,159 INFO L226 Difference]: Without dead ends: 87 [2022-02-14 18:27:31,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-14 18:27:31,160 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 57 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:31,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 276 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 347 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2022-02-14 18:27:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-14 18:27:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-02-14 18:27:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 50 states have internal predecessors, (56), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 18:27:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-02-14 18:27:31,169 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 55 [2022-02-14 18:27:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:31,170 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-02-14 18:27:31,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-14 18:27:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-02-14 18:27:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-14 18:27:31,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:31,171 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:27:31,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 18:27:31,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:31,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-02-14 18:27:31,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:31,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276394626] [2022-02-14 18:27:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:31,380 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:27:31,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82219194] [2022-02-14 18:27:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:31,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:27:31,383 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) [2022-02-14 18:27:31,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 18:27:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:27:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 18:27:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:27:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-14 18:27:31,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:27:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-14 18:27:32,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:27:32,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276394626] [2022-02-14 18:27:32,686 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:27:32,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82219194] [2022-02-14 18:27:32,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82219194] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 18:27:32,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 18:27:32,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 18:27:32,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688097040] [2022-02-14 18:27:32,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:27:32,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 18:27:32,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:27:32,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 18:27:32,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 18:27:32,688 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 18:27:35,155 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 [] [2022-02-14 18:27:37,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 18:27:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:27:37,419 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2022-02-14 18:27:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:27:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-02-14 18:27:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:27:37,421 INFO L225 Difference]: With dead ends: 90 [2022-02-14 18:27:37,421 INFO L226 Difference]: Without dead ends: 83 [2022-02-14 18:27:37,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-14 18:27:37,422 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-14 18:27:37,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-02-14 18:27:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-14 18:27:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-02-14 18:27:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 18:27:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-02-14 18:27:37,437 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-02-14 18:27:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:27:37,437 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-02-14 18:27:37,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 18:27:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-02-14 18:27:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 18:27:37,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:27:37,439 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-02-14 18:27:37,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 18:27:37,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:37,656 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:27:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:27:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2022-02-14 18:27:37,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:27:37,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191519127] [2022-02-14 18:27:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:27:37,693 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:27:37,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272266503] [2022-02-14 18:27:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:27:37,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:27:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:27:37,694 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) [2022-02-14 18:27:37,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process