/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 12:36:19,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 12:36:19,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 12:36:19,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 12:36:19,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 12:36:19,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 12:36:19,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 12:36:19,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 12:36:19,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 12:36:19,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 12:36:19,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 12:36:19,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 12:36:19,330 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 12:36:19,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 12:36:19,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 12:36:19,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 12:36:19,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 12:36:19,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 12:36:19,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 12:36:19,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 12:36:19,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 12:36:19,345 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 [2022-03-17 12:36:19,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 12:36:19,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 12:36:19,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 12:36:19,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 12:36:19,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 12:36:19,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 12:36:19,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 12:36:19,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 12:36:19,371 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 12:36:19,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 12:36:19,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 12:36:19,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 12:36:19,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 12:36:19,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 12:36:19,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 12:36:19,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 12:36:19,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 12:36:19,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 12:36:19,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 12:36:19,565 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 12:36:19,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-03-17 12:36:19,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229d4115c/b05ef263a9df4f738d833f1b7d265f08/FLAGc616d7c74 [2022-03-17 12:36:19,927 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 12:36:19,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-03-17 12:36:19,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229d4115c/b05ef263a9df4f738d833f1b7d265f08/FLAGc616d7c74 [2022-03-17 12:36:20,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229d4115c/b05ef263a9df4f738d833f1b7d265f08 [2022-03-17 12:36:20,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 12:36:20,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 12:36:20,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 12:36:20,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 12:36:20,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 12:36:20,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6839f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20, skipping insertion in model container [2022-03-17 12:36:20,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 12:36:20,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 12:36:20,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[537,550] [2022-03-17 12:36:20,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 12:36:20,504 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 12:36:20,515 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[537,550] [2022-03-17 12:36:20,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 12:36:20,528 INFO L208 MainTranslator]: Completed translation [2022-03-17 12:36:20,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20 WrapperNode [2022-03-17 12:36:20,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 12:36:20,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 12:36:20,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 12:36:20,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 12:36:20,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 12:36:20,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 12:36:20,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 12:36:20,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 12:36:20,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (1/1) ... [2022-03-17 12:36:20,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 12:36:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:36:20,582 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) [2022-03-17 12:36:20,587 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 [2022-03-17 12:36:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 12:36:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 12:36:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 12:36:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 12:36:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 12:36:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 12:36:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 12:36:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 12:36:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 12:36:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 12:36:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 12:36:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 12:36:20,655 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 12:36:20,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 12:36:20,781 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 12:36:20,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 12:36:20,785 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 12:36:20,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 12:36:20 BoogieIcfgContainer [2022-03-17 12:36:20,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 12:36:20,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 12:36:20,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 12:36:20,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 12:36:20,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 12:36:20" (1/3) ... [2022-03-17 12:36:20,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f623e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:36:20, skipping insertion in model container [2022-03-17 12:36:20,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:36:20" (2/3) ... [2022-03-17 12:36:20,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f623e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:36:20, skipping insertion in model container [2022-03-17 12:36:20,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 12:36:20" (3/3) ... [2022-03-17 12:36:20,806 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2022-03-17 12:36:20,810 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 12:36:20,810 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 12:36:20,842 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 12:36:20,849 INFO L340 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 [2022-03-17 12:36:20,849 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 12:36:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 12:36:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 12:36:20,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:20,873 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:20,873 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-17 12:36:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:20,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197096244] [2022-03-17 12:36:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 12:36:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 12:36:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 12:36:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 12:36:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 12:36:21,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:21,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197096244] [2022-03-17 12:36:21,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197096244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:36:21,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:36:21,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 12:36:21,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512113728] [2022-03-17 12:36:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:36:21,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 12:36:21,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 12:36:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 12:36:21,124 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 12:36:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:21,219 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-17 12:36:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 12:36:21,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 12:36:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:21,227 INFO L225 Difference]: With dead ends: 69 [2022-03-17 12:36:21,227 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 12:36:21,230 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 12:36:21,232 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:21,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:36:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 12:36:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-17 12:36:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 12:36:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-17 12:36:21,268 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-17 12:36:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:21,269 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-17 12:36:21,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 12:36:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-17 12:36:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 12:36:21,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:21,271 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:21,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 12:36:21,271 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-17 12:36:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:21,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469003579] [2022-03-17 12:36:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 12:36:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 12:36:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 12:36:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 12:36:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 12:36:21,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469003579] [2022-03-17 12:36:21,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469003579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:36:21,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:36:21,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 12:36:21,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853161031] [2022-03-17 12:36:21,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:36:21,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:36:21,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:36:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 12:36:21,372 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 12:36:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:21,569 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-17 12:36:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 12:36:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-17 12:36:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:21,571 INFO L225 Difference]: With dead ends: 46 [2022-03-17 12:36:21,571 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 12:36:21,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 12:36:21,573 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:21,573 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:36:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 12:36:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-17 12:36:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 12:36:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 12:36:21,601 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-17 12:36:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:21,602 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 12:36:21,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 12:36:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 12:36:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 12:36:21,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:21,603 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:21,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 12:36:21,603 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-17 12:36:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610975441] [2022-03-17 12:36:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 12:36:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 12:36:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 12:36:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 12:36:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-17 12:36:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 12:36:21,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:21,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610975441] [2022-03-17 12:36:21,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610975441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:36:21,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:36:21,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 12:36:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559090744] [2022-03-17 12:36:21,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:36:21,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:36:21,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:36:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 12:36:21,734 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 12:36:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:21,869 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-17 12:36:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 12:36:21,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 12:36:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:21,870 INFO L225 Difference]: With dead ends: 50 [2022-03-17 12:36:21,870 INFO L226 Difference]: Without dead ends: 48 [2022-03-17 12:36:21,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 12:36:21,871 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:21,872 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 12:36:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-17 12:36:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-17 12:36:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 12:36:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-17 12:36:21,879 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-17 12:36:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:21,879 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-17 12:36:21,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 12:36:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-17 12:36:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 12:36:21,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:21,880 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:21,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 12:36:21,881 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-17 12:36:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:21,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924336139] [2022-03-17 12:36:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:21,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:21,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:36:21,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755865988] [2022-03-17 12:36:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:21,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:21,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:36:21,894 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) [2022-03-17 12:36:21,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 12:36:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 12:36:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:36:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 12:36:22,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 12:36:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:22,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924336139] [2022-03-17 12:36:22,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:36:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755865988] [2022-03-17 12:36:22,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755865988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 12:36:22,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 12:36:22,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 12:36:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312260134] [2022-03-17 12:36:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:36:22,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 12:36:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 12:36:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 12:36:22,106 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 12:36:24,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 12:36:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:24,332 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-03-17 12:36:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:36:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-17 12:36:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:24,334 INFO L225 Difference]: With dead ends: 58 [2022-03-17 12:36:24,334 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 12:36:24,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 12:36:24,335 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:24,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 12:36:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 12:36:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 12:36:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 12:36:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-03-17 12:36:24,342 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-03-17 12:36:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:24,343 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-03-17 12:36:24,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 12:36:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-03-17 12:36:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 12:36:24,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:24,344 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:24,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 12:36:24,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:24,577 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-17 12:36:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:24,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258380643] [2022-03-17 12:36:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:24,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:36:24,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146218172] [2022-03-17 12:36:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:24,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:24,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:36:24,602 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) [2022-03-17 12:36:24,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 12:36:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 12:36:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:36:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 12:36:25,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:36:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 12:36:25,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258380643] [2022-03-17 12:36:25,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:36:25,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146218172] [2022-03-17 12:36:25,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146218172] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 12:36:25,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 12:36:25,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 12:36:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083613402] [2022-03-17 12:36:25,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:36:25,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:36:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:25,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:36:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 12:36:25,207 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 12:36:27,275 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 [] [2022-03-17 12:36:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:27,427 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-03-17 12:36:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:36:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-17 12:36:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:27,429 INFO L225 Difference]: With dead ends: 68 [2022-03-17 12:36:27,429 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 12:36:27,430 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 12:36:27,431 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:27,431 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 146 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 12:36:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 12:36:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-17 12:36:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 12:36:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-03-17 12:36:27,441 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-03-17 12:36:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:27,441 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-03-17 12:36:27,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 12:36:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-03-17 12:36:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 12:36:27,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:27,443 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:27,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 12:36:27,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:27,664 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-17 12:36:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:27,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582490685] [2022-03-17 12:36:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:27,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:36:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492880656] [2022-03-17 12:36:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:27,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:27,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:36:27,700 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) [2022-03-17 12:36:27,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 12:36:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 12:36:27,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:36:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-17 12:36:28,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:36:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 12:36:28,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:28,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582490685] [2022-03-17 12:36:28,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:36:28,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492880656] [2022-03-17 12:36:28,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492880656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 12:36:28,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 12:36:28,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-17 12:36:28,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806486290] [2022-03-17 12:36:28,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 12:36:28,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 12:36:28,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 12:36:28,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-17 12:36:28,438 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 12:36:30,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 12:36:33,189 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 [] [2022-03-17 12:36:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:33,264 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2022-03-17 12:36:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 12:36:33,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2022-03-17 12:36:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:33,267 INFO L225 Difference]: With dead ends: 92 [2022-03-17 12:36:33,267 INFO L226 Difference]: Without dead ends: 84 [2022-03-17 12:36:33,267 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-17 12:36:33,268 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:33,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 244 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 214 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-03-17 12:36:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-17 12:36:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-17 12:36:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 50 states have internal predecessors, (56), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 12:36:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-03-17 12:36:33,289 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 55 [2022-03-17 12:36:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:33,290 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-03-17 12:36:33,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 12:36:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-03-17 12:36:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 12:36:33,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:33,293 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:33,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 12:36:33,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:33,497 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:33,498 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-17 12:36:33,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:33,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894353082] [2022-03-17 12:36:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:33,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:33,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:36:33,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915943071] [2022-03-17 12:36:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:33,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:36:33,507 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) [2022-03-17 12:36:33,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 12:36:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 12:36:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 12:36:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 12:36:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-17 12:36:33,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 12:36:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 12:36:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 12:36:34,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894353082] [2022-03-17 12:36:34,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 12:36:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915943071] [2022-03-17 12:36:34,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915943071] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 12:36:34,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 12:36:34,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 12:36:34,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436925183] [2022-03-17 12:36:34,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 12:36:34,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 12:36:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 12:36:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 12:36:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 12:36:34,410 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 12:36:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 12:36:35,353 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2022-03-17 12:36:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 12:36:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-17 12:36:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 12:36:35,355 INFO L225 Difference]: With dead ends: 90 [2022-03-17 12:36:35,355 INFO L226 Difference]: Without dead ends: 83 [2022-03-17 12:36:35,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 12:36:35,356 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 12:36:35,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 12:36:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-17 12:36:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-17 12:36:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 12:36:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-03-17 12:36:35,364 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-03-17 12:36:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 12:36:35,365 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-03-17 12:36:35,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 12:36:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-03-17 12:36:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 12:36:35,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 12:36:35,366 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 12:36:35,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 12:36:35,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:35,583 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 12:36:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 12:36:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2022-03-17 12:36:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 12:36:35,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818085721] [2022-03-17 12:36:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:35,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 12:36:35,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 12:36:35,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129331384] [2022-03-17 12:36:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 12:36:35,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 12:36:35,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 12:36:35,615 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) [2022-03-17 12:36:35,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process