/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 18:07:58,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 18:07:58,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 18:07:58,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 18:07:58,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 18:07:58,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 18:07:58,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 18:07:58,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 18:07:58,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 18:07:58,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 18:07:58,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 18:07:58,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 18:07:58,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 18:07:58,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 18:07:58,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 18:07:58,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 18:07:58,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 18:07:58,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 18:07:58,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 18:07:58,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 18:07:58,152 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 18:07:58,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 18:07:58,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 18:07:58,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 18:07:58,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 18:07:58,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 18:07:58,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 18:07:58,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 18:07:58,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 18:07:58,180 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 18:07:58,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 18:07:58,181 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 18:07:58,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 18:07:58,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 18:07:58,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 18:07:58,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 18:07:58,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 18:07:58,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 18:07:58,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 18:07:58,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 18:07:58,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 18:07:58,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 18:07:58,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 18:07:58,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 18:07:58,184 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 18:07:58,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 18:07:58,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 18:07:58,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 18:07:58,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 18:07:58,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 18:07:58,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 18:07:58,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 18:07:58,434 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 18:07:58,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-02-14 18:07:58,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0630b6279/66149fccc1704547960daba5acb15083/FLAGd81f86ebd [2022-02-14 18:07:58,836 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 18:07:58,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-02-14 18:07:58,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0630b6279/66149fccc1704547960daba5acb15083/FLAGd81f86ebd [2022-02-14 18:07:58,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0630b6279/66149fccc1704547960daba5acb15083 [2022-02-14 18:07:58,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 18:07:58,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 18:07:58,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 18:07:58,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 18:07:58,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 18:07:58,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 06:07:58" (1/1) ... [2022-02-14 18:07:58,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d47259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:58, skipping insertion in model container [2022-02-14 18:07:58,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 06:07:58" (1/1) ... [2022-02-14 18:07:58,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 18:07:58,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 18:07:59,028 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/fermat2-ll_unwindbound100.c[524,537] [2022-02-14 18:07:59,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 18:07:59,049 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 18:07:59,059 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/fermat2-ll_unwindbound100.c[524,537] [2022-02-14 18:07:59,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 18:07:59,073 INFO L208 MainTranslator]: Completed translation [2022-02-14 18:07:59,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59 WrapperNode [2022-02-14 18:07:59,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 18:07:59,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 18:07:59,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 18:07:59,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 18:07:59,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 18:07:59,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 18:07:59,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 18:07:59,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 18:07:59,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (1/1) ... [2022-02-14 18:07:59,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 18:07:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:07:59,126 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 18:07:59,128 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 18:07:59,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 18:07:59,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 18:07:59,158 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 18:07:59,158 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 18:07:59,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 18:07:59,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 18:07:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 18:07:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 18:07:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 18:07:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 18:07:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 18:07:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 18:07:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 18:07:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 18:07:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 18:07:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 18:07:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 18:07:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 18:07:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 18:07:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 18:07:59,220 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 18:07:59,221 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 18:07:59,318 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 18:07:59,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 18:07:59,323 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 18:07:59,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 06:07:59 BoogieIcfgContainer [2022-02-14 18:07:59,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 18:07:59,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 18:07:59,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 18:07:59,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 18:07:59,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 06:07:58" (1/3) ... [2022-02-14 18:07:59,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1941f1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 06:07:59, skipping insertion in model container [2022-02-14 18:07:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 06:07:59" (2/3) ... [2022-02-14 18:07:59,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1941f1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 06:07:59, skipping insertion in model container [2022-02-14 18:07:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 06:07:59" (3/3) ... [2022-02-14 18:07:59,331 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-02-14 18:07:59,335 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 18:07:59,336 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 18:07:59,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 18:07:59,377 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 18:07:59,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 18:07:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 18:07:59,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 18:07:59,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:07:59,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:07:59,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:07:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:07:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-02-14 18:07:59,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:07:59,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871127031] [2022-02-14 18:07:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:07:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:07:59,484 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:07:59,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699532521] [2022-02-14 18:07:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:07:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:07:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:07:59,509 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 18:07:59,542 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 18:07:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:07:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-14 18:07:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:07:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 18:07:59,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:07:59,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:07:59,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871127031] [2022-02-14 18:07:59,736 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:07:59,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699532521] [2022-02-14 18:07:59,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699532521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:07:59,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:07:59,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-14 18:07:59,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576692682] [2022-02-14 18:07:59,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:07:59,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-14 18:07:59,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:07:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-14 18:07:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-14 18:07:59,782 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 18:07:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:07:59,806 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-02-14 18:07:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-14 18:07:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-14 18:07:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:07:59,825 INFO L225 Difference]: With dead ends: 53 [2022-02-14 18:07:59,825 INFO L226 Difference]: Without dead ends: 25 [2022-02-14 18:07:59,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-14 18:07:59,834 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 18:07:59,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 18:07:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-14 18:07:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-14 18:07:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 18:07:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-14 18:07:59,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-02-14 18:07:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:07:59,881 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-14 18:07:59,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 18:07:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-14 18:07:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 18:07:59,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:07:59,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:07:59,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 18:08:00,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-02-14 18:08:00,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:00,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-02-14 18:08:00,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:00,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484131204] [2022-02-14 18:08:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:00,131 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:00,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670569308] [2022-02-14 18:08:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:00,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:00,140 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 18:08:00,193 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 18:08:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:08:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 18:08:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:00,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:08:00,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:00,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484131204] [2022-02-14 18:08:00,342 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:00,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670569308] [2022-02-14 18:08:00,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670569308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:08:00,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:08:00,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 18:08:00,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381119733] [2022-02-14 18:08:00,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:08:00,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 18:08:00,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 18:08:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 18:08:00,356 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 18:08:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:00,373 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-14 18:08:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 18:08:00,375 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 18:08:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:00,377 INFO L225 Difference]: With dead ends: 34 [2022-02-14 18:08:00,377 INFO L226 Difference]: Without dead ends: 27 [2022-02-14 18:08:00,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 18:08:00,379 INFO L933 BasicCegarLoop]: 27 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, 67 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 [2022-02-14 18:08:00,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 18:08:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-14 18:08:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-14 18:08:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 18:08:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-14 18:08:00,393 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-02-14 18:08:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:00,394 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-14 18:08:00,394 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 18:08:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-14 18:08:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 18:08:00,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:00,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:00,419 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 18:08:00,619 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,SelfDestructingSolverStorable1 [2022-02-14 18:08:00,620 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-02-14 18:08:00,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:00,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990879552] [2022-02-14 18:08:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:00,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:00,638 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:00,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647263551] [2022-02-14 18:08:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:00,640 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 18:08:00,641 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 18:08:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:08:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 18:08:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:01,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 18:08:01,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:01,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990879552] [2022-02-14 18:08:01,079 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:01,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647263551] [2022-02-14 18:08:01,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647263551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 18:08:01,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 18:08:01,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 18:08:01,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131947372] [2022-02-14 18:08:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 18:08:01,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 18:08:01,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 18:08:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 18:08:01,081 INFO L87 Difference]: Start difference. First operand 27 states and 31 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 18:08:03,120 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 18:08:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:03,129 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-02-14 18:08:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 18:08:03,134 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-14 18:08:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:03,142 INFO L225 Difference]: With dead ends: 37 [2022-02-14 18:08:03,142 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 18:08:03,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 18:08:03,143 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:03,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-02-14 18:08:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 18:08:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-02-14 18:08:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 18:08:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-02-14 18:08:03,149 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-02-14 18:08:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:03,150 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-02-14 18:08:03,150 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 18:08:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-02-14 18:08:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 18:08:03,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:03,151 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, 1] [2022-02-14 18:08:03,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 18:08:03,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:03,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-02-14 18:08:03,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:03,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90014669] [2022-02-14 18:08:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:03,375 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:03,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451566685] [2022-02-14 18:08:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:03,395 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 18:08:03,396 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 18:08:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:08:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 18:08:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:08:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:03,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:03,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90014669] [2022-02-14 18:08:03,656 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:03,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451566685] [2022-02-14 18:08:03,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451566685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:08:03,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:08:03,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-14 18:08:03,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820506425] [2022-02-14 18:08:03,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:08:03,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 18:08:03,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 18:08:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-14 18:08:03,658 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 18:08:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:03,733 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-02-14 18:08:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 18:08:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-02-14 18:08:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:03,735 INFO L225 Difference]: With dead ends: 39 [2022-02-14 18:08:03,736 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 18:08:03,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-14 18:08:03,737 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:03,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 18:08:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 18:08:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-02-14 18:08:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 18:08:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-02-14 18:08:03,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-02-14 18:08:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:03,743 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-02-14 18:08:03,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 18:08:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-02-14 18:08:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 18:08:03,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:03,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:03,769 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 18:08:03,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:03,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-02-14 18:08:03,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:03,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462926297] [2022-02-14 18:08:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:03,970 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:03,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914489262] [2022-02-14 18:08:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:03,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:03,972 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 18:08:03,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 18:08:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 18:08:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 18:08:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:04,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:08:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:04,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:04,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462926297] [2022-02-14 18:08:04,162 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:04,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914489262] [2022-02-14 18:08:04,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914489262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:08:04,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:08:04,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 18:08:04,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361925475] [2022-02-14 18:08:04,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:08:04,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 18:08:04,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 18:08:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 18:08:04,164 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-14 18:08:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:04,231 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-02-14 18:08:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 18:08:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-02-14 18:08:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:04,234 INFO L225 Difference]: With dead ends: 61 [2022-02-14 18:08:04,234 INFO L226 Difference]: Without dead ends: 56 [2022-02-14 18:08:04,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 18:08:04,237 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:04,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 18:08:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-14 18:08:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-14 18:08:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 18:08:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-02-14 18:08:04,254 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-02-14 18:08:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-02-14 18:08:04,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-14 18:08:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-02-14 18:08:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-14 18:08:04,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:04,277 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:04,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 18:08:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:04,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 2 times [2022-02-14 18:08:04,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:04,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820788275] [2022-02-14 18:08:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:04,504 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:04,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088125978] [2022-02-14 18:08:04,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 18:08:04,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:04,505 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) [2022-02-14 18:08:04,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 18:08:04,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 18:08:04,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 18:08:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 18:08:04,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:04,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:08:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 18:08:04,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:04,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820788275] [2022-02-14 18:08:04,823 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:04,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088125978] [2022-02-14 18:08:04,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088125978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:08:04,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:08:04,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 18:08:04,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704787083] [2022-02-14 18:08:04,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:08:04,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 18:08:04,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 18:08:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 18:08:04,825 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 18:08:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:04,971 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-02-14 18:08:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 18:08:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-02-14 18:08:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:04,973 INFO L225 Difference]: With dead ends: 115 [2022-02-14 18:08:04,973 INFO L226 Difference]: Without dead ends: 110 [2022-02-14 18:08:04,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-14 18:08:04,974 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:04,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 18:08:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-14 18:08:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-14 18:08:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 18:08:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-02-14 18:08:04,988 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-02-14 18:08:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:04,988 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-02-14 18:08:04,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 18:08:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-02-14 18:08:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-14 18:08:04,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:04,990 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:05,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 18:08:05,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:05,208 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 3 times [2022-02-14 18:08:05,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:05,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292679677] [2022-02-14 18:08:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:05,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:05,219 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:05,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647239936] [2022-02-14 18:08:05,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 18:08:05,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:05,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:05,254 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) [2022-02-14 18:08:05,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 18:08:08,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-14 18:08:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 18:08:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 18:08:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:08,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:08:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-14 18:08:08,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:08,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292679677] [2022-02-14 18:08:08,721 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:08,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647239936] [2022-02-14 18:08:08,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647239936] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:08:08,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:08:08,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-14 18:08:08,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555874037] [2022-02-14 18:08:08,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:08:08,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 18:08:08,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 18:08:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-14 18:08:08,723 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-14 18:08:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:09,201 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-02-14 18:08:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-14 18:08:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-02-14 18:08:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:09,203 INFO L225 Difference]: With dead ends: 223 [2022-02-14 18:08:09,203 INFO L226 Difference]: Without dead ends: 218 [2022-02-14 18:08:09,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 18:08:09,204 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:09,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 256 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 18:08:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-14 18:08:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-02-14 18:08:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-14 18:08:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-02-14 18:08:09,225 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-02-14 18:08:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:09,226 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-02-14 18:08:09,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-14 18:08:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-02-14 18:08:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-14 18:08:09,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:09,228 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:09,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 18:08:09,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:09,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 4 times [2022-02-14 18:08:09,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:09,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319378621] [2022-02-14 18:08:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:09,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:09,458 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:09,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491591566] [2022-02-14 18:08:09,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 18:08:09,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:09,460 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) [2022-02-14 18:08:09,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 18:08:09,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 18:08:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 18:08:09,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-14 18:08:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:10,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:08:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-02-14 18:08:11,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:11,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319378621] [2022-02-14 18:08:11,651 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:11,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491591566] [2022-02-14 18:08:11,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491591566] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:08:11,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:08:11,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-14 18:08:11,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551980952] [2022-02-14 18:08:11,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:08:11,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 18:08:11,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 18:08:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 18:08:11,655 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-14 18:08:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:13,136 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2022-02-14 18:08:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-14 18:08:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-02-14 18:08:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:13,141 INFO L225 Difference]: With dead ends: 439 [2022-02-14 18:08:13,142 INFO L226 Difference]: Without dead ends: 434 [2022-02-14 18:08:13,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-02-14 18:08:13,145 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 725 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:13,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 518 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 18:08:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-14 18:08:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-02-14 18:08:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-14 18:08:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-02-14 18:08:13,226 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-02-14 18:08:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:13,227 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-02-14 18:08:13,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-14 18:08:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-02-14 18:08:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-02-14 18:08:13,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:13,248 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:13,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 18:08:13,449 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,SelfDestructingSolverStorable7 [2022-02-14 18:08:13,449 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 5 times [2022-02-14 18:08:13,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:13,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873018566] [2022-02-14 18:08:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:13,469 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:13,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278350814] [2022-02-14 18:08:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 18:08:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:13,488 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) [2022-02-14 18:08:13,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 18:08:16,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-02-14 18:08:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 18:08:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-02-14 18:08:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 18:08:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 18:08:18,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 18:08:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-02-14 18:08:21,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 18:08:21,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873018566] [2022-02-14 18:08:21,452 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 18:08:21,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278350814] [2022-02-14 18:08:21,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278350814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 18:08:21,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 18:08:21,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-02-14 18:08:21,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18314201] [2022-02-14 18:08:21,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 18:08:21,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-14 18:08:21,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 18:08:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-14 18:08:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-02-14 18:08:21,460 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-02-14 18:08:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 18:08:26,511 INFO L93 Difference]: Finished difference Result 871 states and 1013 transitions. [2022-02-14 18:08:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-02-14 18:08:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-02-14 18:08:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 18:08:26,517 INFO L225 Difference]: With dead ends: 871 [2022-02-14 18:08:26,517 INFO L226 Difference]: Without dead ends: 866 [2022-02-14 18:08:26,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-02-14 18:08:26,525 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1515 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 18:08:26,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 974 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 18:08:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-02-14 18:08:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-02-14 18:08:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-02-14 18:08:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-02-14 18:08:26,572 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-02-14 18:08:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 18:08:26,573 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-02-14 18:08:26,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-02-14 18:08:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-02-14 18:08:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-02-14 18:08:26,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 18:08:26,592 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 18:08:26,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 18:08:26,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:26,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 18:08:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 18:08:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 6 times [2022-02-14 18:08:26,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 18:08:26,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134000064] [2022-02-14 18:08:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 18:08:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 18:08:26,878 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 18:08:26,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369861211] [2022-02-14 18:08:26,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 18:08:26,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 18:08:26,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 18:08:26,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 18:08:26,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process